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August 2013 New Products Catalog High Performance Analog ICs LTC2057 High Voltage, Low Noise Zero-Drift Operational Amplifier LTC3330 Nanopower Buck-Boost + DC/DC with Energy Harvesting Battery Life Extender LT4320 Ideal Diode Bridge Controller LT3081 1.5A Single Resistor Rugged Linear Regulator with Monitors LTM4637 20A DC/DC µModule Step-Down Regulator LTC3774 Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing NEW!!!! Free Demo Boards Available!!!! Visit www.arrownac.com/ltcnewproducts to register for your free demo board, view data sheets, purchase parts, or contact your local Arrow sales representative at 800.833.3557. www.arrownac.com/Itcnewproducts Power Management Arrow Vision Series >> Power Management 2013 Coming to a city near you. Rochester, 8/22 Baltimore, 8/29 Focused on one of today’s hottest topics — delivering exceptional performance with ever-greater energy efficiency — this is your chance to join the electronic industry’s foremost innovators in an exciting, Seattle, 9/10 single-day power event. Toronto, 9/26 The Power to Succeed > Hone your expertise with hands-on technical classes > Get inspired as industry experts discuss today’s hottest topics Portland, 9/12 Chicago, 9/19* San Jose, 10/3* Minneapolis, 10/10* Phoenix, 10/17 Boston, 10/24* San Diego, 10/30 > Join the discussion during the “Power Expo” Dallas, November 11/12 > Expand your network with peers, suppliers and industry experts Orange County, 11/19 > Connect to the latest power solutions Los Angeles, 11/21 Attend Linear Technology’s seminars! Register now at www.arrownac.com/vision or contact your local Arrow representative for more information. *Arrowfest 2013 – Powered by Vision Series arrow.com Contents Amplifiers LTC2057/LTC2057HV High Voltage, Low Noise Zero-Drift Operational Amplifier .................................................................................................1 LT6015/LT6016/LT6017 3.2MHz, 0.8V/µs Low Power, Over-The-Top® Precision Op Amps .................................................................................2 Battery Management Systems LTC6804-1/LTC6804-2 Multicell Battery Monitors ...............................................................................................................................................3 Data Converters LTC2313-12 12-Bit, 2.5Msps Serial Sampling ADC in TSOT ................................................................................................................................4 LTC2313-14 14-Bit, 2.5Msps Serial Sampling ADC in TSOT ................................................................................................................................5 LTC2376-20 20-Bit, 250ksps, Low Power SAR ADC with 0.5ppm INL.................................................................................................................7 LTC2377-20 20-Bit, 500ksps, Low Power SAR ADC with 0.5ppm INL.................................................................................................................8 Energy Harvesting LTC3330 Nanopower Buck-Boost + DC/DC with Energy Harvesting Battery Life Extender .................................................................................10 High Frequency LTC5510 1MHz to 6GHz Wideband High Linearity Active Mixer .........................................................................................................................11 Hot Swap™ Controller LTC4227 Dual Ideal Diode and Single Hot Swap Controller................................................................................................................................12 Ideal Diode Bridge LT4320/LT4320-1 Ideal Diode Bridge Controller ................................................................................................................................................14 LDO Linear Regulators LT3007 Series 3µA IQ, 20mA, 45V Low Dropout Fault Tolerant Linear Regulators .............................................................................................15 LT3055 500mA, Linear Regulator with Precision Current Limit and Diagnostics ...............................................................................................16 LT3081 1.5A Single Resistor Rugged Linear Regulator with Monitors...............................................................................................................17 LT3090 –36V, 600mA Negative Linear Regulator with Programmable Current Limit .........................................................................................18 LED Driver LT3955 60VIN LED Converter with Internal PWM Generator ..............................................................................................................................19 µModule® Regulators LTM4637 20A DC/DC µModule Step-Down Regulator .......................................................................................................................................20 LTM4649 10A Step-Down DC/DC µModule Regulator .......................................................................................................................................21 LTM8028 36VIN, UltraFast ™, Low Output Noise 5A µModule Regulator .............................................................................................................22 PMIC LTC3676/LTC3676-1 Power Management Solution for Application Processor ...................................................................................................23 Contents Power System Management LTC2978A 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement .........................................................24 Switching Regulators—Monolithic LTC3374 8-Channel Parallelable 1A Buck DC/DCs .............................................................................................................................................25 LT3574 Isolated Flyback Converter without an Opto-Coupler.............................................................................................................................26 LTC3607 Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator ...........................................................................................27 LTC3630A High Efficiency, 76V 500mA Synchronous Step-Down Converter .....................................................................................................28 LT3995 60V, 3A, 2MHz Step-Down Switching Regulator with 2.7µA Quiescent Current ....................................................................................29 LT8697 USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation ............................................................................30 Switching Regulators—Controller LTC3774 Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing...................................................................32 Design Note DN516 1µA IQ Synchronous Boost Converter Extends Battery Life in Portable Devices L, Linear Express, Linear Technology, LT, LTC, LTM, Burst Mode, FilterCAD, LTspice, OPTI-LOOP, Over-The-Top, PolyPhase, SwitcherCAD, TimerBlox, µModule and the Linear logo are registered trademarks of Linear Technology Corporation. Adaptive Power, Bat-Track, BodeCAD, C-Load, Direct Flux Limit, DirectSense, Easy Drive, EZSync, FilterView, Hot Swap, isoSPI, LDO+, Linduino, LinearView, LTBiCMOS, LTCMOS, LTPoE++, LTpowerCAD, LTpowerPlanner, LTpowerPlay, Micropower SwitcherCAD, Multimode Dimming, No Latency ∆Σ, No Latency Delta-Sigma, No RSENSE, Operational Filter, PanelProtect, PLLWizard, PowerPath, PowerSOT, PScope, QuikEval, RH DICE Inside, RH MILDICE Inside, SafeSlot, Silent Switcher, SmartStart, SNEAK-A-BIT, SoftSpan, Stage Shedding, Super Burst, SWITCHER+, ThinSOT, Triple Mode, True Color PWM, UltraFast, Virtual Remote Sense, Virtual Remote Sensing, VLDO and VRS are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Amplifiers LTC2057/LTC2057HV High Voltage, Low Noise Zero-Drift Operational Amplifier n n n n n n n n n n n n FEATURES DESCRIPTION Supply Voltage Range n 4.75V to 36V (LTC2057) n 4.75V to 60V (LTC2057HV) Offset Voltage: 4μV (Maximum) Offset Voltage Drift: 0.015μV/°C (Maximum, –40°C to 125°C) Input Noise Voltage n 200nVP-P, DC to 10Hz (Typ) n 11nV/√Hz, 1kHz (Typ) Input Common Mode Range: V– – 0.1V to V+ – 1.5V Rail-to-Rail Output Unity Gain Stable Gain Bandwidth Product: 1.5MHz (Typ) Slew Rate: 0.45V/μs (Typ) AVOL: 150dB (Typ) PSRR: 160dB (Typ) CMRR: 150dB (Typ) Shutdown Mode The LTC®2057 is a high voltage, low noise, zero-drift operational amplifier that offers precision DC performance over a wide supply range of 4.75V to 36V or 4.75V to 60V for the LTC2057HV. Offset voltage and 1/f noise are suppressed, allowing this amplifier to achieve a maximum offset voltage of 4μV and a DC to 10Hz input noise voltage of 200nVP-P (typ). The LTC2057’s self-calibrating circuitry results in low offset voltage drift with temperature, 0.015μV/°C (max), and zero-drift over time. The amplifier also features an excellent power supply rejection ratio (PSRR) of 160dB and a common mode rejection ratio (CMRR) of 150dB (typ). APPLICATIONS n n n n n n n n High Resolution Data Acquisition Reference Buffering Test and Measurement Electronic Scales Thermocouple Amplifiers Strain Gauges Low Side Current Sense Automotive Monitors and Control The LTC2057 provides rail-to-rail output swing and an input common mode range that includes the V– rail (V– – 0.1V to V+ – 1.5V). In addition to low offset and noise, this amplifier features a 1.5MHz (typ) gain-bandwidth product and a 0.45V/μs (typ) slew rate. Wide supply range, combined with low noise, low offset, and excellent PSRR and CMRR make the LTC2057 and LTC2057HV well suited for high dynamic-range test, measurement and instrumentation systems. Wide Input Range Precision Gain-of-100 Instrumentation Amplifier 30V –IN + LTC2057HV – 18V –30V TOP VIEW 232Ω SD 1 –IN 2 +IN 3 V– 4 – + 9 V– 7 V+ 6 OUT 5 NC TOP VIEW SD –IN +IN V– 1 2 3 4 – + 30V 8 7 6 5 SDCOM V+ OUT NC DD DD PACKAGE PACKAGE 8-LEAD (3mm (3mm ×× 3mm) 3mm) PLASTIC PLASTIC DFN DFN 8-LEAD MS8 MS8 PACKAGE PACKAGE 8-LEAD PLASTIC PLASTIC MSOP MSOP 8-LEAD LTC2057IDD LTC2057HVIDD LTC2057HDD LTC2057HVHDD LTC2057IMS8 LTC2057HVIMS8 LTC2057HMS8 LTC2057HVHMS8 – +IN + –IN 2 +IN 3 – + V– 4 8 SDCOM 7 V+ 6 OUT 5 NC 1 2 3 4 5 – + 6 VOUT 2057 TA01a INPUT CM RANGE = ±28V WITH 4V OF OUTPUT SWING CMRR = 130dB (TYP), INPUT OFFSET VOLTAGE = 1µV (TYP) –30V Input Offset Voltage vs Supply Voltage 5 5 TYPICAL UNITS 4 VCM = VS /2 T = 25°C 3 A TOP VIEW GRD –IN +IN GRD V– 7 8 M9 V CC 9 M3 10 M1 LT1991A OUT 1 P1 REF 2 P3 VEE 5 3 P9 4 –18V LTC2057HV TOP VIEW SD 1 11.5k 11.5k 8 SDCOM 2 10 9 8 7 6 S8 PACKAGE 8-LEAD 8-LEAD PLASTIC PLASTIC SO SO MS PACKAGE 10-LEAD 10-LEAD PLASTIC PLASTIC MSOP MSOP LTC2057IS8 LTC2057HVIS8 LTC2057HS8 LTC2057HVHS8 LTC2057IMS LTC2057HVIMS LTC2057HMS LTC2057HVHMS SD SDCOM V+ NC OUT VOS (µV) n 1 0 –1 –2 –3 –4 –5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 VS (V) 2057 TA01b 1 Amplifiers LT6015/LT6016/LT6017 3.2MHz, 0.8V/µs Low Power, Over-The-Top Precision Op Amps n n n n n n n n n n n n n n FEATURES DESCRIPTION Input Common Mode Range: V– to V– + 76V Rail-to-Rail Input and Output Low Power: 315μA/Amplifier Operating Temperature Range: –55°C to 150°C VOS: ±50μV (Maximum) CMRR, PSRR: 126dB Reverse Battery Protection to 50V Gain Bandwidth Product: 3.2MHz Specified on 5V and ±15V Supplies High Voltage Gain: 1000V/mV No Phase Reversal No Supply Sequencing Problems Single 5-Lead SOT-23 (ThinSOT™) Package Dual 8-Lead MSOP Quad 22-Lead DFN (6mm × 3mm) The LT®6015/LT6016/LT6017 are single/dual/quad rail-to-rail input operational amplifiers with input offset voltage trimmed to less than 50µV. These amplifiers operate on single and split supplies with a total voltage of 3V to 50V and draw only 315µA per amplifier. They are reverse battery protected, drawing very little current for reverse supplies up to 50V. The Over-The-Top® input stage of the LT6015/LT6016/LT6017 is designed to provide added protection in tough environments. The input common mode range extends from V– to V+ and beyond: these amplifiers operate with inputs up to 76V above V– independent of V+. Internal resistors protect the inputs against transient faults up to 25V below the negative supply. The LT6015/LT6016/LT6017 can drive loads up to 25mA and are unity-gain stable with capacitive loads as large as 200pF. Optional external compensation can be added to extend the capacitive drive capability beyond 200pF. The LT6015 is offered in a 5-lead SOT package. The LT6016 dual op amp is available in an 8-lead MSOP package. The LT6017 is offered in a 22-pin leadless DFN package. APPLICATIONS n n n n n High Side or Low Side Current Sensing Battery/Power Supply Monitoring 4mA to 20mA Transmitters High Voltage Data Acquisition Battery/Portable Instrumentation Precision High Voltage High Side Load Current Monitor TOP VIEW TOP VIEW OUTA 1 22 OUTD –INA 2 21 –IND +INA 3 N/C 4 19 N/C V– 5 18 V + N/C 6 A D 23 20 +IND 7 16 V N/C 8 15 N/C +INB 9 –INB 10 B 1 2 3 4 C OUTB 11 DJC DJC PACKAGE PACKAGE 22-LEAD (6mm (6mm ×× 3mm) 3mm) PLASTIC PLASTIC DFN DFN 22-LEAD LT6017IDJC LT6017HDJC LT6017MPDJC 5V VBAT = 1.5V TO 76V 200Ω 0.1Ω 10W 200Ω 0.1µF + LT6015 100Ω 1% – 1V/A 0V TO 1V OUT LOAD 2k TOP VIEW Output Error vs Load Current 5 V+ OUT 1 0.2 V– 2 4 –IN +IN 3 S5 PACKAGE 5-LEAD 5-LEAD PLASTIC PLASTIC TSOT-23 TSOT-23 LT6015IS5 LT6015HS5 LT6015MPS5 0 –0.2 –0.4 –0.6 VBAT = 1.5V VBAT = 5V VBAT = 20V VBAT = 75V –0.8 –1.0 0.01 2 BSP89 601567 TA01a 14 +INC 12 OUTC B V+ OUTB –INB +INB LT6016IMS8 LT6016HMS8 LT6016MPMS8 + 13 –INC A 8 7 6 5 MS8 PACKAGE 8-LEAD 8-LEAD PLASTIC PLASTIC MSOP MSOP 17 N/C – V OUTA –INA +INA V– OUTPUT ERROR (%) n 0.1 LOAD CURRENT (A) 1 601567 TA01b Battery Management Systems LTC6804-1/LTC6804-2 Multicell Battery Monitors n n n n n n n n n n n n FEATURES DESCRIPTION Measures Up to 12 Battery Cells in Series Stackable Architecture Supports 100s of Cells Built-In isoSPI™ Interface: 1Mbps Isolated Serial Communications Uses a Single Twisted Pair, Up to 100 Meters Low EMI Susceptibility and Emissions 1.2mV Maximum Total Measurement Error 290µs to Measure All Cells in a System Synchronized Voltage and Current Measurement 16-Bit Delta-Sigma ADC with Frequency Programmable 3rd Order Noise Filter Engineered for ISO26262 Compliant Systems Passive Cell Balancing with Programmable Timer 5 General Purpose Digital I/O or Analog Inputs: Temperature or other Sensor Inputs Configurable as an I2C or SPI Master 4μA Sleep Mode Supply Current 48-Lead SSOP Package The LTC®6804 is a 3rd generation multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1.2mV. The cell measurement range of 0V to 5V makes the LTC6804 suitable for most battery chemistries. All 12 cell voltages can be captured in 290µs, and lower data acquisition rates can be selected for high noise reduction. Multiple LTC6804 devices can be connected in series, permitting simultaneous cell monitoring of long, high voltage battery strings. Each LTC6804 has an isoSPI interface for high speed, RF-immune, local area communications. Using the LTC6804-1, multiple devices are connected in a daisy-chain with one host processor connection for all devices. Using the LTC6804-2, multiple devices are connected in parallel to the host processor, with each device individually addressed. Additional features include passive balancing for each cell, an onboard 5V regulator, and 5 general purpose I/O lines. In sleep mode, current consumption is reduced to 4µA. The LTC6804 can be powered directly from the battery, or from an isolated supply. APPLICATIONS n Total Measurement Error vs Temperature of 5 Typical Units 2.0 1.5 TOP VIEW TOP VIEW V+ 1 48 IPB V+ 1 48 A3 C12 2 47 IMB C12 2 47 A2 S12 3 46 ICMP S12 3 46 A1 C11 4 45 IBIAS C11 4 45 A0 S11 5 44 SDO (NC)* S11 5 44 SDO (IBIAS)* C10 6 43 SDI (NC)* C10 6 43 SDI (ICMP)* S10 7 42 SCK (IPA)* S10 7 42 SCK (IPA)* C9 8 41 CSB (IMA)* C9 8 41 CSB (IMA)* S9 9 40 ISOMD S9 9 40 ISOMD C8 10 39 WDT C8 10 39 WDT S8 11 38 DRIVE S8 11 38 DRIVE C7 12 37 VREG C7 12 37 VREG S7 13 36 SWTEN S7 13 36 SWTEN C6 14 35 VREF1 C6 14 35 VREF1 S6 15 34 VREF2 S6 15 34 VREF2 C5 16 33 GPIO5 C5 16 33 GPIO5 S5 17 32 GPIO4 S5 17 32 GPIO4 C4 18 31 V– C4 18 31 V– S4 19 30 V–** S4 19 30 V–** C3 20 29 GPIO3 C3 20 29 GPIO3 S3 21 28 GPIO2 S3 21 28 GPIO2 C2 22 27 GPIO1 C2 22 27 GPIO1 S2 23 26 C0 S2 23 26 C0 C1 24 25 S1 C1 24 25 S1 G PACKAGE 48-LEAD PLASTIC SSOP G PACKAGE 48-LEAD PLASTIC SSOP G PACKAGE 48-LEAD PLASTIC SSOP G PACKAGE 48-LEAD PLASTIC SSOP LTC6804IG-1 LTC6804HG-1 LTC6804IG-2 LTC6804HG-2 + 12S1P + IPB + + 0.5 0 –0.5 –1.0 –2.0 –50 –25 IMB ILP IPA 75 50 25 TEMPERATURE (°C) 0 100 125 680412 TA01b • • IPB LTC6804-1 IMB IPA IMA + 1.0 –1.5 LTC6804-1 IMA + CELL VOLTAGE = 3.3V 5 TYPICAL UNITS • • IPB MPU LTC6804-1 IMB IPA SPI • • n Electric and Hybrid Electric Vehicles Backup Battery Systems Grid Energy Storage High Power Portable Equipment MEASUREMENT ERROR (mV) n • • n IP LTC6820 IMA IM 680412 TA01a 3 Data Converters LTC2313-12 12-Bit, 2.5Msps Serial Sampling ADC in TSOT n n n n n n n n n n n n n FEATURES DESCRIPTION 2.5Msps Throughput Rate No Cycle Latency Guaranteed 12-Bit No Missing Codes Single 3V or 5V Supply Low Noise: 73dB SNR Low Power: 14mW at 2.5Msps and 3V Supply Low Drift (20ppm/°C Maximum) 2.048V or 4.096V Internal Reference Sleep Mode with < 1µA Typical Supply Current Nap Mode with Quick Wake-Up < 1 Conversion Separate 1.8V to 5V Digital I/O Supply High Speed SPI-Compatible Serial I/O Guaranteed Operation from –40°C to 125°C 8-Lead TSOT-23 Package The LTC®2313-12 is a 12-bit, 2.5Msps, serial sampling A/D converter that draws only 5mA from a single 3V or 5V supply. The LTC2313-12 contains an integrated low drift reference and reference buffer providing a low cost, high performance (20ppm/°C maximum) and space saving solution. The LTC2313-12 achieves outstanding AC performance of 72.6dB SINAD and –84dB THD while sampling at 2.5Msps. The extremely high sample rate-to-power ratio makes the LTC2313-12 ideal for compact, low power, high speed systems. The supply current decreases at lower sampling rates as the device automatically enters nap mode after conversions. The LTC2313-12 has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3V and 5V logic. The fast 2.5Msps throughput with no cycle latency makes the LTC2313-12 ideally suited for a wide variety of high speed applications. APPLICATIONS n n n n n n Communication Systems High Speed Data Acquisition Handheld Terminal Interface Medical Imaging Uninterrupted Power Supplies Battery Operated Systems Automotive 5V Supply, Internal Reference, 2.5Msps, 12-Bit Sampling ADC 5V LTC2313-12 2.2µF VDD CONV REF SCK GND SDO 2.2µF TOP VIEW VDD REF GND AIN 8 7 6 5 1 2 3 4 CONV SCK SDO OVDD ANALOG INPUT 0V TO 4.096V AIN SERIAL DATA LINK TO ASIC, PLD, MPU, DSP OR SHIFT REGISTERS OVDD 2.2µF TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 DIGITAL OUTPUT SUPPLY 1.8V TO 5V 231312 TA01a LTC2313CTS8-12 LTC2313ITS8-12 LTC2313HTS8-12 fS = 2.5Msps, fIN = 497kHz 16k-pt FFT 0 VDD = 5V SNR = 73dBFS SINAD = 72.6dBFS THD = –84dB SFDR = 87dB –20 –40 AMPLITUDE (dBFS) n –60 –80 –100 –120 –140 –160 4 0 250 500 750 INPUT FREQUENCY (kHz) 1000 231312 TA01b Data Converters LTC2313-14 14-Bit, 2.5Msps Serial Sampling ADC in TSOT n n n n n n n n n n n n n FEATURES DESCRIPTION 2.5Msps Throughput Rate No Cycle Latency Guaranteed 14-Bit No Missing Codes Single 3V or 5V Supply Low Noise: 77.5dB SNR Low Power: 14mW at 2.5Msps and 3V Supply Low Drift (20ppm/°C Maximum) 2.048V or 4.096V Internal Reference Sleep Mode with < 1µA Typical Supply Current Nap Mode with Quick Wake-Up < 1 Conversion Separate 1.8V to 5V Digital I/O Supply High Speed SPI-Compatible Serial I/O Guaranteed Operation from –40°C to 125°C 8-Lead TSOT-23 Package The LTC®2313-14 is a 14-bit, 2.5Msps, serial sampling A/D converter that draws only 5mA from a single 3V or 5V supply. The LTC2313-14 contains an integrated low drift reference and reference buffer providing a low cost, high performance (20ppm/°C maximum) and space saving solution. The LTC2313-14 achieves outstanding AC performance of 77dB SINAD and –85dB THD while sampling at 2.5Msps. The extremely high sample rate-to-power ratio makes the LTC2313-14 ideal for compact, low power, high speed systems. The supply current decreases at lower sampling rates as the device automatically enters nap mode after conversions. The LTC2313-14 has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3V and 5V logic. The fast 2.5Msps throughput with no cycle latency makes the LTC2313-14 ideally suited for a wide variety of high speed applications. APPLICATIONS n n n n n n Communication Systems High Speed Data Acquisition Handheld Terminal Interface Medical Imaging Uninterrupted Power Supplies Battery Operated Systems Automotive 5V Supply, Internal Reference, 2.5Msps, 14-Bit Sampling ADC 5V LTC2313-14 2.2µF VDD CONV REF SCK GND SDO 2.2µF TOP VIEW VDD REF GND AIN 8 7 6 5 1 2 3 4 CONV SCK SDO OVDD ANALOG INPUT 0V TO 4.096V AIN SERIAL DATA LINK TO ASIC, PLD, MPU, DSP OR SHIFT REGISTERS OVDD 2.2µF DIGITAL OUTPUT SUPPLY 1.8V TO 5V TS8 PACKAGE PACKAGE TS8 8-LEAD 8-LEAD PLASTIC PLASTIC TSOT-23 TSOT-23 231314 TA01 LTC2313CTS8-14 LTC2313ITS8-14 LTC2313HTS8-14 16k Point FFT, fS = 2.5Msps, fIN = 497kHz 0 VDD = 5V SNR = 77.5dBFS SINAD = 77dBFS THD = –85dB SFDR = 87dB –20 –40 AMPLITUDE (dBFS) n –60 –80 –100 –120 –140 –160 0 250 500 750 INPUT FREQUENCY (kHz) 1000 231314 TA01b 5 Tiny All-in-One 14-Bit 4.5Msps SAR ADC 20ppm/°C Max Integrated Reference in 8mm2 TSOT ® The LTC 2314-14 leads a family of highly integrated 14-/12-bit Successive Approximation Register (SAR) ADCs from 500ksps to 5Msps, available in tiny 8-lead TSOT-23 packages. These ADCs integrate a precision bandgap reference with guaranteed 20ppm/ºC maximum temperature coefficient and an internal reference buffer in an 8mm2 footprint, saving space in high density designs. They offer the flexibility of 3V or 5V supply operation and low power consumption, including nap and sleep modes. Features Complete 14-Bit/12-Bit Pin-Compatible SAR ADC Family • 4.5Msps Throughput Rate • Low Noise: 77.5dB SNR, -85dB THD (5V Supply) 500ksps 2.5Msps 4.5Msps 14-Bit 2312-14 2313-14 2314-14 12-Bit 2312-12 2313-12 Power Consumption 3V/5V 8mW/14mW 14mW/26mW 5Msps • ±3.75LSB INL, ±0.99LSB DNL Max (5V Supply) • Low Power: 31mW at 4.5Msps (5V Supply) • Flexible 3V or 5V Supply Operation • Internal Reference: 2.048V or 4.096V Span • Guaranteed Operation –40°C to 125°C • 8-Lead TSOT-23 Package , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 2315-12 18mW/ 31mW 19mW/ 32mW Info & Free Samples 1-800-4-LINEAR www.linear.com/LTC2314-14 Data Converters LTC2376-20 20-Bit, 250ksps, Low Power SAR ADC with 0.5ppm INL n n n n n n n n n n n n n n n FEATURES DESCRIPTION 250ksps Throughput Rate ±0.5ppm INL (Typ) Guaranteed 20-Bit No Missing Codes Low Power: 5.3mW at 250ksps, 5.3µW at 250sps 104dB SNR (Typ) at fIN = 2kHz –125dB THD (Typ) at fIN = 2kHz Digital Gain Compression (DGC) Guaranteed Operation to 85°C 2.5V Supply Fully Differential Input Range ±VREF VREF Input Range from 2.5V to 5.1V No Pipeline Delay, No Cycle Latency 1.8V to 5V I/O Voltages SPI-Compatible Serial I/O with Daisy-Chain Mode Internal Conversion Clock 16-Lead MSOP and 4mm × 3mm DFN Packages The LTC®2376-20 is a low noise, low power, high speed 20-bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the LTC2376-20 has a ±VREF fully differential input range with VREF ranging from 2.5V to 5.1V. The LTC2376-20 consumes only 5.3mW and achieves ±2ppm INL maximum, no missing codes at 20 bits with 104dB SNR. The LTC2376-20 has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisy-chain mode. The fast 250ksps throughput with no cycle latency makes the LTC2376-20 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2376-20 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate. The LTC2376-20 features a unique digital gain compression (DGC) function, which eliminates the driver amplifier’s negative supply while preserving the full resolution of the ADC. When enabled, the ADC performs a digital scaling function that maps zero-scale code from 0V to 0.1 • VREF and full-scale code from VREF to 0.9 • VREF. For a typical reference voltage of 5V, the full-scale input range is now 0.5V to 4.5V, which provides adequate headroom for powering the driving amplifier from a single 5.5V supply. APPLICATIONS n n n n n n Medical Imaging High Speed Data Acquisition Portable or Compact Instrumentation Industrial Process Control Low Power Battery-Operated Instrumentation Automatic Test Equipment 2.5V 1.8V TO 5V 10µF VREF 0V VREF 0V 10Ω + 6800pF 10Ω OVDD VDD IN+ LTC2376-20 3300pF – 0.1µF IN– 6800pF REF GND CHAIN RDL/SDI SDO SCK BUSY CNV REF/DGC 2.5V TO 5.1V 47µF (X7R, 1210 SIZE) TOP VIEW CHAIN 1 VDD 2 GND 3 IN+ 4 IN– 5 GND 6 REF 7 REF/DGC 8 16 GND 15 OVDD 17 GND 14 SDO 13 SCK 12 RDL/SDI 11 BUSY 10 GND 9 CNV DE DE PACKAGE PACKAGE 16-LEAD (4mm (4mm ×× 3mm) 3mm) PLASTIC PLASTIC DFN DFN 16-LEAD LTC2376CDE-20 LTC2376IDE-20 SAMPLE CLOCK VREF 237620 TA01 Integral Nonlinearity vs Output Code TOP VIEW CHAIN VDD GND IN+ IN– GND REF REF/DGC 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 MS MS PACKAGE PACKAGE 16-LEAD PLASTIC PLASTIC MSOP MSOP 16-LEAD LTC2376CMS-20 LTC2376IMS-20 GND OVDD SDO SCK RDL/SDI BUSY GND CNV 2.0 1.5 1.0 INL ERROR (ppm) n 0.5 0 –0.5 –1.0 –1.5 –2.0 Patents Pending. Protected by U.S. Patents, including 7705765, 7961132, 8319673. 0 262144 524288 786432 OUTPUT CODE 1048576 237620 TA02 7 Data Converters LTC2377-20 20-Bit, 500ksps, Low Power SAR ADC with 0.5ppm INL n n n n n n n n n n n n n n n FEATURES DESCRIPTION 500ksps Throughput Rate ±0.5ppm INL (Typ) Guaranteed 20-Bit No Missing Codes Low Power: 10.5mW at 500ksps, 10.5µW at 500sps 104dB SNR (Typ) at fIN = 2kHz –125dB THD (Typ) at fIN = 2kHz Digital Gain Compression (DGC) Guaranteed Operation to 85°C 2.5V Supply Fully Differential Input Range ±VREF VREF Input Range from 2.5V to 5.1V No Pipeline Delay, No Cycle Latency 1.8V to 5V I/O Voltages SPI-Compatible Serial I/O with Daisy-Chain Mode Internal Conversion Clock 16-Lead MSOP and 4mm × 3mm DFN Packages The LTC®2377-20 is a low noise, low power, high speed 20-bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the LTC2377-20 has a ±VREF fully differential input range with VREF ranging from 2.5V to 5.1V. The LTC2377-20 consumes only 10.5mW and achieves ±2ppm INL maximum, no missing codes at 20 bits with 104dB SNR. The LTC2377-20 has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisy-chain mode. The fast 500ksps throughput with no cycle latency makes the LTC2377-20 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2377-20 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate. The LTC2377-20 features a unique digital gain compression (DGC) function, which eliminates the driver amplifier’s negative supply while preserving the full resolution of the ADC. When enabled, the ADC performs a digital scaling function that maps zero-scale code from 0V to 0.1 • VREF and full-scale code from VREF to 0.9 • VREF. For a typical reference voltage of 5V, the full-scale input range is now 0.5V to 4.5V, which provides adequate headroom for powering the driving amplifier from a single 5.5V supply. APPLICATIONS n n n n n n Medical Imaging High Speed Data Acquisition Portable or Compact Instrumentation Industrial Process Control Low Power Battery-Operated Instrumentation Automatic Test Equipment 2.5V 1.8V TO 5V 10µF VREF 0V VREF 0V 10Ω + 10Ω OVDD VDD 6800pF IN+ LTC2377-20 3300pF – 0.1µF IN– 6800pF REF GND CHAIN RDL/SDI SDO SCK BUSY CNV REF/DGC 2.5V TO 5.1V SAMPLE CLOCK VREF 237720 TA01 47µF (X7R, 1210 SIZE) Integral Nonlinearity vs Output Code TOP VIEW CHAIN 1 VDD 2 GND 3 IN+ 4 IN– 5 GND 6 REF 7 REF/DGC 8 8 2.0 16 GND 15 OVDD 17 GND 14 SDO 13 SCK 12 RDL/SDI 11 BUSY 10 GND 9 CNV TOP VIEW CHAIN VDD GND IN+ IN– GND REF REF/DGC 1 2 3 4 5 6 7 8 1.5 16 15 14 13 12 11 10 9 DE PACKAGE PACKAGE DE 16-LEAD (4mm (4mm ××3mm) 3mm)PLASTIC PLASTICDFN DFN 16-LEAD MS MS PACKAGE PACKAGE 16-LEAD PLASTIC MSOP 16-LEAD PLASTIC MSOP LTC2377CDE-20 LTC2377IDE-20 LTC2377CMS-20 LTC2377IMS-20 GND OVDD SDO SCK RDL/SDI BUSY GND CNV 1.0 INL ERROR (ppm) n 0.5 0 –0.5 –1.0 –1.5 –2.0 0 262144 524288 786432 OUTPUT CODE 1048576 237720 TA02 Patents Pending. Protected by U.S. Patents, including 7705765, 7961132, 8319673. 20-Bit 1Msps SAR ADC 0.5ppm INL IN+ 0V 2.5V Integral Nonlinearity vs Output Code OVDD 1.8V to 5V VDD VREF SPI I/O Up to 5V IN– 2.0 1.5 1.0 INL Error (PPM) 2.5V to 5V Up to 5V 0.5 0.0 –0.5 –1.0 GND –1.5 –2.0 0V 0 262144 524288 786432 1048576 Output Code No Latency SAR ADC Achieves 104dB SNR ® The LTC 2378-20 SAR ADC achieves 20 bits of resolution with outstanding 0.5ppm INL and 104dB SNR performance with no cycle latency and sample rates up to 1Msps. It offers uncompromised performance, low power dissipation and excellent temperature stability for high precision signal chains. The LTC2378-20 family includes pin-compatible 20-/18-/16-bit SAR ADCs from 250ksps up to 2Msps with serial SPI interface and explicit Busy and Chain pins that simplify digital timing. Features Complete 20-/18-/16-Bit Pin-Compatible SAR ADC Family • 1Msps Throughput Rate 250ksps 500ksps 1Msps 20-Bit 104dB SNR 2376-20 2377-20 2378-20 18-Bit 101dB SNR 2376-18 2377-18 2378-18 16-Bit 96dB SNR 2376-16 2377-16 2378-16 • ±0.5ppm INL (Typ), ±2ppm INL (Max) • 104dB SNR (Typ) at fIN = 2kHz • –125dB THD (Typ) at fIN = 2kHz • Low Power: 21mW at 1Msps, 21μW at 1ksps • Fully Differential Input Range ±VREF • VREF Input Range from 2.5V to 5.1V • Digital Gain Compression Eliminates Need for Negative Rails • –40°C to +85°C Guaranteed Temperature Range • 16-pin MSOP and 4mm x 3mm DFN Packages , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 1.6Msps 2Msps 2379-18 2380-16 Info & Free Samples 1-800-4-LINEAR www.linear.com/LTC2378-20 Energy Harvesting LTC3330 Nanopower Buck-Boost + DC/DC with Energy Harvesting Battery Life Extender n n n n n n n n n n FEATURES DESCRIPTION Dual Input, Single Output DC/DCs with Input Prioritizer Energy Harvesting Input: 3.0V to 20V Buck DC/DC Primary Cell Input: 1.8V to 5.5V Buck-Boost DC/DC Zero Battery IQ When Powering Load from Harvested Energy Ultralow Quiescent Current: 750nA at No-Load Low Noise LDO Post Regulator Integrated Supercapacitor Balancer Up to 50mA of Output Current Programmable DC/DC and LDO Output Voltages, Buck UVLO, and Buck-Boost Peak Input Current Integrated Low Loss Full-Wave Bridge Rectifier Input Protective Shunt Up to 25mA at VIN ≥ 20V 5mm × 5mm QFN-32 Package The LTC®3330 integrates a high voltage energy harvesting power supply plus a DC/DC converter powered by a primary cell battery to create a single output supply for alternative energy applications. The energy harvesting power supply, consisting of an integrated full-wave bridge rectifier and a high voltage buck converter, harvests energy from piezoelectric, solar, or magnetic sources. The primary cell input powers a buck-boost converter capable of operation down to 1.8V at its input. Either DC/DC converter can deliver energy to a single output. The buck operates when harvested energy is available, reducing the quiescent current draw on the battery to essentially zero. The buck-boost takes over when harvested energy goes away. APPLICATIONS Voltage and current settings for both inputs and outputs are programmable via pin-strapped logic inputs. The LTC3330 is available in a 5mm × 5mm QFN-32 package. 4V TO 18V LDO_EN VIN3 PGLDO PGVOUT EH_ON OUT0 OUT1 TOP VIEW + BAL 1 24 LDO0 SCAP 2 23 LDO1 VIN2 3 3V TO 18V SOLAR PANEL 32 31 30 29 28 27 26 25 – UV3 4 4.7µF, 6V 19 IPK2 UV0 7 18 IPK1 AC1 8 17 IPK0 BAT SWA SWB 9 10 11 12 13 14 15 16 VOUT VIN SW LTC3330 UH PACKAGE UH PACKAGE 32-LEAD (5mm (5mm × × 5mm) 32-LEAD 5mm) PLASTIC PLASTIC QFN QFN LTC3330EUH LTC3330IUH SWA CAP SWB VIN2 VOUT PIEZO MIDE V25W 22µH 22µH 1.2V TO 5V 50mA LDO_IN 20 LDO_OUT UV1 6 SW AC2 21 LDO_IN 33 GND UV2 5 AC1 1µF 6V 10µF 25V 22 LDO2 CAP n OUT2 n VIN n Energy Harvesting Solar Powered Systems with Primary Cell Backup Wireless HVAC Sensors and Security Devices Mobile Asset Tracking AC2 n A low noise LDO post regulator and a supercapacitor balancer are also integrated, accommodating a wide range of output storage configurations. + PRIMARY CELL 1.8V TO 5.5V 1µF 6V 10mF 2.5V SCAP BAT BAL 3 3 3 4 OUT[2:0] LDO_EN LDO[2:0] EH_ON 10mF 2.5V OPTIONAL PGVOUT IPK[2:0] 22µF 6V PGLDO UV[3:0] 1.2V TO 3.6V 50mA LDO_OUT GND VIN3 1µF 6V 2.2µF 6V 3330 TA01a 10 High Frequency LTC5510 1MHz to 6GHz Wideband High Linearity Active Mixer n n n n n n n n n n n n n FEATURES DESCRIPTION Input/LO Frequency Range to 6GHz 50Ω Matched Input from 30MHz to >3GHz Capable of Upconversion or Downconversion OIP3: 27dBm at fOUT = 1575MHz 1.5dB Conversion Gain Noise Figure: 11.6dB at fOUT = 1575MHz High Input P1dB: 11dBm at 5V 5V or 3.3V Supply at 105mA Shutdown Control LO Input Impedance Always Matched 0dBm LO Drive Level 0n-Chip Temperature Monitor –40°C to 105°C Operation (TC) 16-Lead (4mm × 4mm) QFN Package The LTC®5510 is a high linearity mixer optimized for applications requiring very wide input bandwidth, low distortion, and low LO leakage. The chip includes a double-balanced active mixer with an input buffer and a high speed LO amplifier. The input is optimized for use with 1:1 transmission-line baluns, allowing very wideband impedance matching. The mixer can be used for both upconversion and downconversion and can be used in wideband systems. The LO can be driven differentially or single-ended and requires only 0dBm of LO power to achieve excellent distortion and noise performance, while also reducing external drive circuit requirements. The LTC5510 offers low LO leakage, greatly reducing the need for output filtering to meet LO suppression requirements. The LTC5510 is optimized for 5V but can also be used with a 3.3V supply with slightly reduced performance. The shutdown function allows the part to be disabled for further power savings. APPLICATIONS 30MHz to 4GHz Up/Down Mixer for Wideband Receiver LO 50Ω TEMPERATURE MONITOR TCM1-43X+ 1:1 IN 30MHz TO 4GHz 50Ω 0.1µF 0.6pF 0.1µF 0.1µF TEMP 0.1µF LO+ BD1222J50200AHF 4:1 LO– LTC5510 OUT– OUT 1575MHz 50Ω 6.8nH BIAS LGND EN VCC1 6.8pF 6.8nH OUT+ IN+ IN– VCC2 IADJ 4.75kΩ 10nF EN 5V 10nF 1µF 5510 TA01 Conversion Gain, IIP3 and NF vs Input Frequency GND LO– LO+ TOP VIEW 30 16 15 14 13 12 GND TEMP 1 IN+ 2 11 OUT+ 17 IN– 3 10 OUT – LGND 4 9 6 7 GND 8 IADJ 5 VCC2 n TP n Wideband Receivers/Transmitters Cable Downlink Infrastructure HF/VHF/UHF Mixer Wireless Infrastructure EN n VCC1 n UF UFPACKAGE PACKAGE 16-LEAD(4mm (4mm××4mm) 4mm)PLASTIC PLASTICQFN QFN 16-LEAD LTC5510IUF GAIN (dB), IIP3 (dBm), NF (dB) n 25 IIP3 20 HS LO 15 LS LO NF 10 fOUT = 1575MHz PIN = –10dBm PLO = 0dBm TC = 25°C 5 GC 0 0 1000 2000 3000 INPUT FREQUENCY (MHz) 4000 5510 TA01a 11 Hot Swap Controller LTC4227 Dual Ideal Diode and Single Hot Swap Controller n n n n n n n n n n n n FEATURES DESCRIPTION Power Path and Inrush Current Control for Redundant Supplies Low Loss Replacement for Power Schottky Diodes Allows Safe Hot Swapping from a Live Backplane 2.9V to 18V Operating Range Controls N-Channel MOSFETs Limits Peak Fault Current in ≤1µs 0.5µs Ideal Diode Turn-On and Reverse Turn-Off Time Adjustable Current Limit with Circuit Breaker Smooth Switchover without Oscillation Adjustable Current Limit Fault Delay Fault and Power Status Output 20-Lead 4mm × 5mm QFN and 16-Lead SSOP Packages The LTC®4227 offers ideal diode-OR and Hot Swap™ functions for two power rails by controlling external N-channel MOSFETs. MOSFETs acting as ideal diodes replace two high power Schottky diodes and the associated heat sinks, saving power and board area. A Hot Swap control MOSFET allows a board to be safely inserted and removed from a live backplane by limiting inrush current. The supply output is also protected against short-circuit faults with a fast acting current limit and internal timed circuit breaker. The LTC4227 regulates the forward voltage drop across the MOSFETs to ensure smooth current transfer from one supply to the other without oscillation. The ideal diodes turn on quickly to reduce the load voltage droop during supply switchover. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients. The LTC4227 allows turn-on/off control, and reports fault and power good status for the supply. APPLICATIONS PART OVERCURRENT FAULT START-UP DELAY LTC4227-1 LATCH OFF 100ms LTC4227-2 RETRY 100ms LTC4227-3 LATCH OFF 1.6ms LTC4227-4 RETRY 1.6ms Diode-OR with Hot Swap Application SiR462DP 12V 0.1µF SiR462DP 12V 0.006Ω Si7336ADP + 0.1µF 137k CPO1 IN1 DGATE1 CPO2 IN2 DGATE2 SENSE+ 12V 7.6A 100µF SENSE– HGATE OUT ON 20k FAULT LTC4227 PWRGD EN BACKPLANE CONNECTOR INTVCC D2ON GND 0.1µF CARD CONNECTOR TMR 4227 TA01a 0.1µF OUT HGATE CPO1 TOP VIEW DGATE1 20 19 18 17 SENSE– 1 16 NC SENSE+ 2 15 ON IN1 3 14 EN 21 INTVCC 4 13 TMR GND 5 12 D2ON IN2 6 11 FAULT 8 9 10 PWRGD 7 NC n Redundant Power Supplies and Supply Holdup Computer Systems and Servers Telecom Networks CPO2 n DGATE2 n UFD PACKAGE PACKAGE UFD 20-LEAD (4mm × 5mm) PLASTIC QFN 20-LEAD (4mm × 5mm) PLASTIC QFN LTC4227CUFD-1 LTC4227CUFD-2 LTC4227CUFD-3 LTC4227CUFD-4 12 LTC4227IUFD-1 LTC4227IUFD-2 LTC4227IUFD-3 LTC4227IUFD-4 Smooth Supply Switchover TOP VIEW DGATE1 1 16 CPO1 SENSE– 2 15 HGATE SENSE+ 3 14 OUT IN1 4 13 ON INTVCC 5 12 TMR GND 6 11 D2ON IN2 7 10 PWRGD DGATE2 8 9 IN2 1V/DIV IIN1 2A/DIV CPO2 GN PACKAGE PACKAGE GN 16-LEAD PLASTIC SSOP NARROW 16-LEAD PLASTIC SSOP NARROW LTC4227CGN-1 LTC4227CGN-2 IN1 1V/DIV LTC4227IGN-1 LTC4227IGN-2 IIN2 2A/DIV 200ns/DIV 4227 TA01b Ideal Diode Bridge Output 9V to 72V Input DC to 600Hz Active Diode Bridge Controller Minimizes Voltage Drop & Heat Sinking Requirements ® The workhorse of AC to DC rectification, the classic four-diode bridge, just got a makeover. The LT 4320 simulates an ideal diode bridge by controlling four N-channel MOSFETs, significantly reducing heat dissipation and maximizing voltage to the application. Heat sinks can be eliminated, reducing solution size and cost. More power is available to the end application instead of being wasted as heat. Low voltage applications also benefit with the increased headroom provided by the MOSFET bridge. Features Temperature Rise vs Load Current • Low Loss Replacement for Diode Bridge • Maximizes Power Efficiency • Eliminates Thermal Design Problems • Maximizes Available Voltage • 9V to 72V Operating Voltage Range • DC to 600Hz Operation • IQ = 1.5mA (Typical) • –55°C to +125°C Guaranteed Temperature Range • 8-Pin 3mm x 3mm DFN and 12-Lead MSOP Packages www.linear.com/product/LT4320 90 1-800-4-LINEAR MOSFET FDMS86500 80 Temperature Rise (°C) • Controls N-Channel MOSFETs Info & Free Samples Diode SMB1040 70 60 50 40 30 20 10 0 video.linear.com/136 0 2 4 6 Current (A) 8 10 , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Ideal Diode Bridge LT4320/LT4320-1 Ideal Diode Bridge Controller n n n n n n n FEATURES DESCRIPTION Maximizes Power Efficiency Eliminates Thermal Design Problems DC to 600Hz 9V to 72V Operating Voltage Range IQ = 1.5mA (Typical) Maximizes Available Voltage Available in 8-Lead (3mm × 3mm) DFN and 12-Lead MSOP Packages The LT®4320/LT4320-1 are ideal diode bridge controllers that drive four N-channel MOSFETs, supporting voltage rectification from DC to 600Hz. By maximizing available voltage and reducing power dissipation (see thermograph comparison below), the ideal diode bridge simplifies power supply design and reduces power supply cost, especially in low voltage applications. An ideal diode bridge also eliminates thermal design problems, costly heat sinks, and greatly reduces PC board area. The LT4320’s internal charge pump supports an all-NMOS design, which eliminates larger and more costly PMOS switches. If the power source fails or is shorted, a fast turn-off minimizes reverse current transients. APPLICATIONS n n n n n Security Cameras Terrestrial or Airborne Power Distribution Systems Power-over-Ethernet Powered Device with a Secondary Input Polarity-Agnostic Power Input Diode Bridge Replacement The LT4320 is designed for DC to 60Hz voltage rectification, while the LT4320-1 is designed for DC to 600Hz voltage rectification. Higher frequencies of operation are possible depending on MOSFET size and operating load current. TOP VIEW IN2 1 TG2 2 BG2 3 9 BG1 4 + 8 IN1 7 TG1 6 OUTP 5 OUTN TG1 DD DD PACKAGE PACKAGE 8-LEAD (3mm (3mm ×× 3mm) 3mm) PLASTIC PLASTIC DFN DFN 8-LEAD ~ LT4320IDD LT4320IDD-1 TOP VIEW IN2 TG2 NC NC BG2 BG1 1 2 3 4 5 6 13 IN1 TG1 NC OUTP NC OUTN MSE MSE PACKAGE PACKAGE 12-LEAD 12-LEAD PLASTIC PLASTIC MSOP MSOP TG2 LT4320 OUTPUT 9V TO 72V IN2 IN1 BG2 12 11 10 9 8 7 OUTP OUTN BG1 INPUT DC TO 600Hz – ~ 4320 TA01a LT4320IMSE LT4320IMSE-1 Thermograph of Passive Diode Bridge Thermograph of LT4320 Driving Four MOSFETs Temperature Rise (°C) CURRENT (A) MOSFET 2.5mΩ DIODE SBM 1040 2 0.6 15 4 3.5 32 6 6.7 49 8 11 66 10 16 84 DC Input, on Same PCB SBM1040 (×4) 14 4320 TA01b 4320 TA01c LT4320+2.5mΩ FET (×4) CONDITIONS: 24V ACIN, 9.75A DC LOAD ON SAME PCB Patent Pending. LDO Linear Regulators LT3007 Series 3µA IQ, 20mA, 45V Low Dropout Fault Tolerant Linear Regulators n n n n n n n n n n n n n n FEATURES DESCRIPTION FMEA Fault Tolerant: Output Stays at or Below Regulation Voltage During Adjacent Pin Short or if a Pin Is Left Floating Ultralow Quiescent Current: 3µA Input Voltage Range: 2.0V to 45V Output Current: 20mA Dropout Voltage: 300mV Adjustable Output (VADJ = VOUT(MIN) = 600mV) Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V Output Tolerance: ±2% Over Load, Line and Temperature Stable with Low ESR, Ceramic Output Capacitors (2.2µF Minimum) Shutdown Current: <1µA Current Limit Protection Reverse-Battery Protection Thermal Limit Protection TSOT-23 Package The LT®3007 series are micropower, low dropout voltage (LDO) linear regulators. The devices supply 20mA output current with a dropout voltage of 300mV. No-load quiescent current is 3µA. Ground pin current remains at less than 5% of output current as load increases. In shutdown, quiescent current is less than 1µA. The LT3007 regulators optimize stability and transient response with low ESR ceramic capacitors, requiring a minimum of only 2.2µF. The regulators do not require the addition of ESR as is common with other regulators. Internal protection circuitry includes current limiting, thermal limiting, reverse-battery protection and reversecurrent protection. The LT3007 series are ideal for applications that require moderate output drive capability coupled with ultralow standby power consumption. The device is available in fixed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V, and an adjustable version with an output voltage range of 0.6V to 44.5V. The LT3007 is available in the thermally enhanced 8-lead TSOT-23 package. APPLICATIONS n n n n n Automotive Low Current Battery-Powered Systems Keep-Alive Power Supplies Remote Monitoring Utility Meters Low Power Industrial Applications 3.3V, 20mA Supply with Shutdown IN VIN 3.8V TO 45V 1µF SHDN GND GND GND 1 2 3 4 OUT SHDN 8 7 6 5 VOUT 3.3V 20mA SENSE GND ADJ/SENSE** OUT NC IN 3007 TA01a Dropout Voltage/Quiescent Current 500 450 6 ILOAD = 20mA DROPOUT VOLTAGE 400 350 5 4 300 250 IQ 200 3 2 150 100 QUIESCENT CURRENT (µA) TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 8-LEAD PLASTIC TSOT-23 LT3007ETS8 LT3007ITS8-1.8 LT3007ITS8 LT3007ETS8-2.5 LT3007ETS8-1.2 LT3007ITS8-2.5 LT3007ITS8-1.2 LT3007ETS8-3.3 LT3007ETS8-1.5 LT3007ITS8-3.3 T3007ITS8-1.5 LT3007ETS8-5 LT3007ETS8-1.8 LT3007ITS8-5 2.2µF LT3007-3.3 TOP VIEW DROPOUT VOLTAGE (mV) n 1 50 0 –50 –25 0 0 25 50 75 100 125 150 TEMPERATURE (°C) 3007 TA01b 15 LDO Linear Regulators LT3055 500mA, Linear Regulator with Precision Current Limit and Diagnostics n n n n n n n n n n n n n n FEATURES DESCRIPTION Output Current: 500mA Dropout Voltage: 350mV Input Voltage Range: 2V to 45V Programmable Precision Current Limit: ±10% Output Current Monitor: 1/500th of IOUT Programmable Minimum IOUT Monitor Temperature Monitor: 10mV/°C FAULT Indicator: Current Limit, Thermal Limit or Minimum IOUT Low Noise: 25μVRMS (10Hz to 100kHz) Adjustable Output (VREF = VOUT(MIN) = 0.6V) Output Tolerance: ±2% Over Load, Line and Temperature Stable with Low ESR, Ceramic Output Capacitors (3.3μF Minimum) Shutdown Current: <1μA Reverse Battery and Thermal Limit Protection 16-Lead 4mm × 3mm DFN and MSOP Packages The LT®3055 is a micropower, low noise, low dropout voltage (LDO) linear regulator. The device supplies 500mA of output current with a dropout voltage of 350mV. A 10nF bypass capacitor reduces output noise to 25μVRMS in a 10Hz to 100kHz bandwidth and soft starts the reference. The LT3055’s ±45V input voltage rating combined with its precision current limit and diagnostic functions make the IC an ideal choice for robust, high reliability applications. A single resistor programs the LT3055’s current limit, accurate to ±10% over a wide input voltage and temperature range. Another resistor programs the LT3055’s minimum output current monitor, useful for detecting open-circuit conditions. The current monitor function sources a current equal to 1/500th of output current. Logic fault pins assert low if the LT3055 is in current limit (FAULT2), operating below its minimum output current (FAULT1) or is in thermal limit (both FAULT1 and FAULT2). PWRGD indicates output regulation. The TEMP pin indicates average die temperature. APPLICATIONS n n n n n The LT3055 optimizes stability and transient response with low ESR ceramic capacitors, requiring a minimum of 3.3μF. Internal protection circuitry includes current limiting, thermal limiting, reverse battery protection, reverse current protection and reverse output protection. Protected Antenna Supplies Automotive Telematics Industrial Applications (Trucks, Forklifts, etc.) High Reliability Applications Noise-Sensitive RF or DSP Supplies The LT3055 is available as an adjustable device with an output voltage range from 0.6V to 40V. 5V Supply with 497mA Precision Current Limit, 10mA IMIN VIN 12V + IN 10µF 22nF 0.1µF 200k 200k 200k 604Ω (THRESHOLD = 497mA) 120k (THRESHOLD = 10mA) LT3055 OUT SHDN FAULT1 FAULT2 PWRGD IMAX ADJ IMON TEMP IMIN REF/BYP GND 442k 1% 60.4k 1% 1k (ADC FULL-SCALE = 1V) IN 1 IN 2 SHDN 3 FAULT1 4 FAULT2 5 PWRGD 6 TEMP 7 IMON 8 17 GND 12 GND 11 REF/BYP 10 IMAX 9 IMIN DE PACKAGE 16-LEAD (4mm (4mm ×× 3mm) 3mm) PLASTIC PLASTIC DFN DFN 16-LEAD LT3055EDE LT3055IDE 16 TO µP ADC Precision Current Limit, RIMAX = 604Ω 550 16 OUT 15 OUT 14 ADJ 13 GND 0.1µF TOP VIEW IN IN SHDN FAULT1 FAULT2 PWRGD TEMP IMON 1 2 3 4 5 6 7 8 17 GND 16 15 14 13 12 11 10 9 MSE PACKAGE 16-LEAD 16-LEAD PLASTIC PLASTIC MSOP MSOP LLT3055EMSE LT3055IMSE LT3055MPMSE LT3055HMSE OUT OUT ADJ GND GND REF/BYP IMAX IMIN TO µP ADC 10nF 3055 TA01a TOP VIEW 5V 10µF 10nF CURRENT LIMIT FAULT THRESHOLD (mA) n 540 VOUT(NOMINAL) = 5V 530 520 510 500 490 VIN = 7V VIN = 5.6V 480 470 460 450 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3055 TA01b LDO Linear Regulators LT3081 1.5A Single Resistor Rugged Linear Regulator with Monitors n n n n n n n n n n n n n n n FEATURES DESCRIPTION Extended Safe Operating Area Maximum Output Current: 1.5A Stable with or without Input/Output Capacitors Wide Input Voltage Range: 1.2V to 36V Single Resistor Sets Output Voltage Output Current Monitor: IMON = IOUT/5000 Junction Temperature Monitor: 1µA/°C Output Adjustable to 0V 50µA SET Pin Current: 1% Initial Accuracy Output Voltage Noise: 27µVRMS Parallel Multiple Devices for Higher Current or Heat Spreading Programmable Current Limit Reverse-Battery and Reverse-Current Protection <1mV Load Regulation Typical Independent of VOUT <0.001%/V Line Regulation Typical Available in Thermally Enhanced 12-Lead 4mm × 4mm DFN and 16-Lead TSSOP, 7-Lead DD-Pak and 7-Lead TO-220 The LT®3081 is a 1.5A low dropout linear regulator designed for rugged industrial applications. Key features of the IC are the extended safe operating area (SOA), output current monitor, temperature monitor and programmable current limit. The LT3081 can be paralleled for higher output current or heat spreading. The device withstands reverse input and reverse output-to-input voltages without reverse current flow. APPLICATIONS n n n n n All Surface Mount Power Supply Rugged Industrial Power Supply Post Regulator for Switching Supplies Low Output Voltage Supply Intrinsic Safety Applications The LT3081’s precision 50µA reference current source allows a single resistor to program output voltage to any level between zero and 34.5V. The current reference architecture makes load regulation independent of output voltage. The LT3081 is stable with or without input and output capacitors. The output current monitor (IOUT/5000) and die junction temperature output (1µA/°C) provide system monitoring and debug capability. In addition, a single resistor pro-grams current limit. Internal protection circuitry includes reverse-battery and reversecurrent protection, current limiting and thermal limiting. The LT3081 is offered in the 16-lead TSSOP (with exposed pad for improved thermal performance), 7-lead TO-220, 7-lead DD-Pak, and an 12-lead 4mm × 4mm DFN. Wide Safe Operating Area Supply VIN IN LT3081 TOP VIEW TOP VIEW OUT 1 12 IN OUT 2 11 IN OUT 3 OUT 4 ILIM 5 SET 6 10 IN 13 OUT 9 IN 8 TEMP 7 IMON OUT 1 16 OUT OUT 2 15 IN OUT 3 14 IN OUT 4 17 OUT ISET 50µA + – OUT 13 IN OUT 5 ILIM 6 11 TEMP SET 7 10 IMON OUT 8 9 12 IN TEMP RTEMP 1k SET IMON RSET 30.1k COUT* 10µF ILIM RIMON 1k RILIM 6.04k OUT DF PACKAGE PACKAGE DF 12-LEAD (4mm × 4mm) PLASTIC DFN 12-LEAD (4mm × 4mm) PLASTIC DFN FE FE PACKAGE PACKAGE 16-LEAD PLASTIC PLASTIC TSSOP 16-LEAD TSSOP LT3081EDF LT3081IDF LT3081EFE LT3081IFE IOUT 1.5V RLOAD* 1.5A 5mA MIN 3081 TA01a *OPTIONAL SET Pin Current 50.5 50.4 IL = 5mA 50.3 FRONT VIEW TAB IS OUT 7 6 5 4 3 2 1 PACKAGE RRPACKAGE 7-LEADPLASTIC PLASTIC DD 7-LEAD DD LT3081ER LT3081IR FRONT VIEW NC IN TEMP OUT IMON SET ILIM TAB IS OUT 7 6 5 4 3 2 1 T7 PACKAGE T7 PACKAGE 7-LEAD PLASTIC TO-220 7-LEAD PLASTIC TO-220 LT3081ET7 LT3081IT7 NC IN TEMP OUT IMON SET ILIM SET PIN CURRENT (µA) n 50.2 50.1 50.0 49.9 49.8 49.7 49.6 49.5 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 3081 TA01b 17 LDO Linear Regulators LT3090 –36V, 600mA Negative Linear Regulator with Programmable Current Limit n n n n n n n n n n n n n n n n n n n FEATURES DESCRIPTION Output Current: 600mA Single Resistor Sets Output Voltage 50µA SET Pin Current: ±1% Initial Accuracy Programmable Current Limit Bipolar Output Current Monitor Parallelable for Higher Current and Heat Spreading Low Dropout Voltage: 300mV Low Output Noise: 20µVRMS (10Hz to 100kHz) Configurable as 3-Terminal Floating Regulator Wide Input Voltage Range: –1.5V to –36V Rail-to-Rail Output Voltage Range: 0V to –35.5V Positive/Negative Shutdown Logic or UVLO Internal Back-Up Current Limit with Foldback Load Regulation: 100µV (1mA to 600mA) Line Regulation: 20ppm/V Stable with 4.7µF Minimum Output Capacitor Stable with Ceramic or Tantalum Capacitors Reverse Output Protection Thermally Enhanced 10-Lead MSOP and 10-Lead 0.75mm × 3mm × 3mm DFN Packages The LT®3090 is a 600mA, low dropout negative linear regulator that is easily parallelable to increase output current or spread heat on surface mounted boards. Designed with a precision current reference followed by a high performance rail-to-rail voltage buffer, this regulator finds use in applications requiring precision output, high current with no heat sink, output adjustability to zero and low dropout voltage. This new architecture can also be configured as a 3-terminal floating regulator. The LT3090 features fast transient response, high PSRR and output noise as low as 20µVRMS, making it ideal for noise sensitive RF applications. The LT3090’s architecture allows it to generate a wide output voltage range (0V to –35.5V) while maintaining unity gain operation. This yields virtually constant bandwidth, load regulation, PSRR and noise, regardless of the programmed output voltage. The LT3090 supplies 600mA at a typical dropout voltage of 300mV. Operating quiescent current is nominally 1mA and drops to << 1µA in shutdown. A single resistor adjusts the LT3090’s precision programmable current limit. The LT3090’s bipolar current monitor either sinks a current (0.5mA/A) or sources a current (1mA/A) proportional to output current. Built-in protection includes reverse output protection, internal current limit with foldback and thermal shutdown with hysteresis. APPLICATIONS n n n n Post Regulator for Switching Supplies Low Noise Instrumentation and RF Supplies Rugged Industrial Supplies Precision Power Supplies TOP VIEW IN 1 IN 2 ILIM 3 IMONP 4 IMONN 5 10 OUT 11 IN 9 OUT TO ADC 49.9k 3.32k 8 GND 6 SHDN LT3090 SET GND DD PACKAGE 10-LEAD 10-LEAD (3mm (3mm ×× 3mm) 3mm) PLASTIC PLASTIC DFN DFN + LT3090EDD LT3090IDD LT3090HDD LT3090MPDD – IN IN IN ILIM IMONP IMONN 1 2 3 4 5 6 13 IN 4.7µF VIN –3.3V 12 11 10 9 8 7 MSE PACKAGE 12-LEAD 12-LEAD PLASTIC PLASTIC MSOP MSOP LT3090EMSE LT3090IMSE LT3090HMSE LT3090MPMSE 4.7µF 7 SET TOP VIEW 18 0.1µF OUT OUT OUT GND SET SHDN 50µA IMONP OUT VOUT –2.5V MAX IOUT 600mA IMONN IN 3.3V SHDN ILIM 0.1µF 10k 3090 TA01 LED Driver LT3955 60VIN LED Converter with Internal PWM Generator n n n n n n n n n n n n n n n FEATURES DESCRIPTION 3000:1 True Color PWM™ Dimming for LEDs Wide VIN Range: 4.5V to 60V Rail-to-Rail Current Sense Range: 0V to 80V Internal 80V/3.5A Switch Programmable PWM Dimming Signal Generator Constant Current (±3%) and Constant-Voltage (±2%) Regulation Accurate Analog Dimming Drives LEDs in Boost, SEPIC, CUK, Buck Mode, Buck-Boost Mode, or Flyback Configuration Output Short-Circuit Protected Boost Open LED Protection and Reporting Adjustable Switching Frequency: 100kHz to 1MHz Programmable VIN UVLO with Hysteresis C/10 Indication for Battery Chargers Low Shutdown Current: <1µA Thermally Enhanced 5mm × 6mm QFN Package The LT®3955 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator. It features an internal low side N-channel MOSFET rated for 80V/3.5A. The LT3955 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A voltage feedback pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size. The LT3955 senses output current at the high side or at the low side of the load. The PWM input can be configured to self-oscillate at fixed frequency with duty ratio programmable from 4% to 96%. When driven by an external signal, the PWM input provides LED dimming ratios of up to 3000:1. The CTRL input provides additional analog dimming capability. APPLICATIONS 94% Efficiency 20W Boost LED Driver with Internal PWM Dimming VIN 5V TO 60V 22µH 4.7µF ×2 499k VIN 36 35 34 33 32 31 30 SYNC 1 28 ISP EN/UVLO 2 27 ISN INTVCC 3 37 GND GND 4 25 FB 165k INTVCC DIM 124k 23 PWMOUT 10nF 38 SW SW 8 SW 9 LT3955 28.7k 350kHz 20 SW 300mA ISN 20W LED STRING (CURRENT DERATED FOR VIN < 9V) FB VMODE DIM/SS SYNC PWM RT PWMOUT VC GND GNDK INTVCC 5.1k 47nF 4.7nF 300Hz 21 SW 0.82Ω 1M 100k 24 GND VIN 6 CTRL PGND ISP VREF 1M 2.2µF ×5 SW EN/UVLO 147k VC CTRL VREF PWM VMODE TOP VIEW DIM/SS 16.9k INTVCC 1µF NC 10 3955 TA01a PGND PGND PGND 12 13 14 15 16 17 PGND n PGND n High Power LEDs Output Short-Circuit Protected Boost Battery and Supercap Chargers Accurate Current Limited Voltage Regulators RT n GNDK n UHE PACKAGE PACKAGE UHE 36-LEAD (5mm × 6mm) PLASTIC QFN 36-LEAD (5mm × 6mm) PLASTIC QFN LT3955EUHE LT3955IUHE NOTE: GND, GNDK AND SIGNAL LEVEL COMPONENTS MUST BE CONNECTED EXTERNALLY AS SHOWN. AN INTERNAL CONNECTION BETWEEN GNDK AND PGND PINS PROVIDES GROUNDING TO THE SUPPLY. PWM Dimming Waveforms at Various DIM Voltage Settings VDIM = 8V DCPWM = 97.2% VDIM = 3.87V DCPWM = 50% ILED 0.3A/ DIV VDIM = 1.47V DCPWM = 10% 0.5ms/DIV VIN = 24V, VLED = 65V Protected by U.S. Patents, including 7199560, 7321203. 3955 TA01b VDIM = 0V DCPWM = 2.8% 19 µModule Regulators LTM4637 20A DC/DC µModule Step-Down Regulator n n n n n n n n n n n n n n n n FEATURES DESCRIPTION Complete 20A Switch Mode Power Supply 4.5V to 20V Input Voltage Range 0.6V to 5.5V Output Voltage Range ±1.5% Total DC Output Voltage Error (–40°C to 125°C) Differential Remote Sense Amplifier for Precision Regulation for (VOUT ≤ 3.3V) Current Mode Control/Fast Transient Response Parallel Current Sharing (Up to 80A) Frequency Synchronization Selectable Pulse-Skipping or Burst Mode® Operation Soft-Start / Voltage Tracking Up to 88% Efficiency (12VIN, 1.8VOUT) Overcurrent Foldback Protection Output Overvoltage Protection Internal Temperature Monitor Overtemperature Protection 15mm × 15mm × 4.32mm LGA Package The LTM®4637 is a complete 20A output high efficiency switch mode step-down DC/DC µModule (micromodule) regulator. Included in the package are the switching controller, power FETs, inductor and compensation components. Operating over an input voltage range from 4.5V to 20V, the LTM4637 supports an output voltage range of 0.6V to 5.5V, set by a single external resistor. Only a few input and output capacitors are needed. Current mode operation allows precision current sharing of up to four LTM4637 regulators to obtain up to 80A output. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, multiphase/current sharing, Burst Mode operation and output voltage tracking for supply rail sequencing. A diode-connected PNP transistor is available for use as an internal temperature monitor. The LTM4637 is offered in a 15mm × 15mm × 4.32mm LGA package. The LTM4637 is RoHS compliant. The LTM4637 is pin compatible with the LTM4627, a 15A DC/DC µModule regulator. APPLICATIONS n n n Telecom Servers and Networking Equipment Industrial Equipment Medical Systems High Ambient Temperature Systems 1 2 3 VIN TOP VIEW MODE_PLLIN INTVCC TRACK/SS 4 5 6 7 8 9 10 2.2µF VIN 12V 22µF 16V ×4 COMP 11 12 10k 0.1µF VIN EXTVCC INTVCC PGOOD COMP VOUT TRACK/SS VOUT_LCL RUN DIFF_OUT LTM4637 fSET VOSNS+ MODE_PLLIN VOSNS– TEMP A VIN 12VIN, 1.2VOUT, 20A DC/DC µModule® Regulator SGND RUN fSET B GND VFB VOUT 1.2V 20A 330pF 100µF 6.3V ×2 + 470µF 6.3V ×2 RFB 60.4k 4637 TA01a C INTVCC D F TEMP EXTVCC PGOOD VFB G PGOOD E GND 100 J VOSNS+ K DIFF_OUT L VOUT_LCL M VOSNS– LGA PACKAGE LGA PACKAGE 133-LEAD (15mm × 15mm × 4.32mm) 1.2VOUT 250kHz CCM 95 SGND H VOUT 12VIN Efficiency vs Load Current 90 EFFICIENCY (%) n 85 80 75 133-LEAD (15mm × 15mm × 4.32mm) LTM4637EV LTM4637IV 20 70 65 0 2 4 6 8 10 12 14 16 18 20 OUTPUT CURRENT (A) 4637 TA01b Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210. µModule Regulators LTM4649 10A Step-Down DC/DC µModule Regulator n n n n n n n n n n n FEATURES DESCRIPTION 10A DC Output Current Input Voltage Range: 4.5V to 16V Output Voltage Range: 0.6V Up to 3.3V No Heat Sink or Current Derating Up to 85°C Ambient Temperature ±1.5% Total DC Voltage Output Error Multiphase Operation with Current Sharing Remote Sense Amplifier Built-In General Use Temperature Monitor Selectable Pulse-Skipping Mode/Burst Mode® Operation for High Efficiency at Light Load Soft-Start/Voltage Tracking Protection: Output Overvoltage and Overcurrent Foldback 9mm × 15mm × 4.92mm BGA Package The LTM®4649 is a complete 10A high efficiency switching mode step-down DC/DC µModule® regulator in a 9mm × 15mm × 4.92 BGA package. Included in the package are the switching controller, power FETs, inductor, and all support components. Operating over an input voltage range of 4.5V to 16V, the LTM4649 supports an output voltage range of 0.6V to 3.3V, set by a single external resistor. This high efficiency design delivers 10A continuous current. Only bulk input and output capacitors are needed. High switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, programmable multiphase operation, spread spectrum, output voltage tracking for supply rail sequencing. Fault protection features include overvoltage protection, overcurrent protection. The LTM4649 is offered in a small thermally enhanced 9mm × 15mm × 4.92mm BGA package. The LTM4649 is RoHS compliant. APPLICATIONS n Telecom, Networking and Industrial Equipment Point-of-Load Regulation A B GND 1 CLKIN PHMODE MODE VIN F 4.5V to 16V Input, 1.5V Output DC/DC µModule Regulator G GND RUN VIN 4.5V TO 16V CLKOUT 2 NC FREQ 3 INTVCC 4 CLKIN VIN 22µF 16V ×2 NC 7 SW COMP FB FREQ VOUT INTVCC VOUT_LCL SW DIFFOUT RUN TRACK/SS 5 TEMP 6 PGOOD TOP VIEW C D E MODE LTM4649 TRACK/SS DIFFN 8 DIFFP DIFFOUT 9 VOUT_LCL 0.1µF TEMP GND 100µF 6.3V ×2 DIFFP VOUT 1.5V 10A DIFFN PHMODE VFB COMP 6.65k PGOOD CLKOUT 4649 TA01a 10 11 GND Efficiency and Power Loss at 12V and 5V Input VOUT BGA PACKAGE 68-LEAD 15mm ×× 4.92mm) 4.92mm) 68-LEAD (9mm (9mm × × 15mm LTM4649EY LTM4649IY Current Derating: 12V Input, 1.5VOUT, No Heat Sink 95 3.0 12 90 2.5 10 85 2.0 80 1.5 75 1.0 70 65 VIN = 12V VIN = 5V 0 2 4 6 LOAD CURRENT (A) 8 10 POWER LOSS (W) EFFICIENCY (%) n LOAD CURRENT (A) n 8 6 4 0.5 2 0 0 4649 TA01b Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending. 400LFM 200LFM 0LFM 0 40 60 80 100 20 AMBIENT TEMPERATURE (°C) 120 4649 TA01c 21 µModule Regulators LTM8028 36VIN, UltraFast, Low Output Noise 5A µModule Regulator FEATURES DESCRIPTION High Performance 5A Linear Regulator with Switching Step-Down Converter for High Efficiency n Digitally Programmable V OUT: 0.8V to 1.8V n Input Voltage Range: 6V to 36V n Very Tight Tolerance Over Temperature, Line, Load and Transient Response n Low Output Noise: 40μV RMS (10Hz to 100kHz) n Parallel Multiple Devices for 10A or More n Accurate Programmable Current Limit to Allow Asymmetric Power Sharing n Analog Output Margining: ±10% Range n Synchronization Input n Stable with Low ESR Ceramic Output Capacitors n 15mm × 15mm × 4.92mm Surface Mount BGA Package The LTM®8028 is a 36VIN, 5A µModule® regulator, consisting of an UltraFast™ 5A linear regulator preceded by a high efficiency switching regulator. In addition to providing tight output regulation, the linear regulator automatically controls the output voltage of the switcher to provide optimal efficiency and headroom for dynamic response. n The output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. An analog margining function allows the user to adjust system output voltage over a continuous ±10% range, and a single-ended feedback sense line may be used to mitigate IR drops due to parasitic resistance. The LTM8028 is packaged in a compact (15mm × 15mm × 4.92mm) overmolded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8028 is RoHS compliant. APPLICATIONS FPGA and DSP Supplies n High Speed I/O n ASIC and Microprocessor Supplies n Servers and Storage Devices n Low Output Noise, 1.2V, 5A µModule Regulator LTM8028 VIN VIN 9V TO 15V 150k RUN MARGA IMAX 10µF 0.01µF BKV SS 82.5k VOUT 1.2V 5A VOUT LINEAR REGULATOR SENSEP PGOOD RT SYNC GND VOB VO0 VO1 VO2 137µF + f = 500kHz 100µF 470µF 8028 TA01a TOP VIEW 11 BANK 1 10 SENSEP TEST PGOOD VO1 VOB MARGA VO0 VO2 BANK 2 VOUT VOUT 20mV/DIV BKV 9 8 7 BANK 3 6 IOUT 2A/DIV ∆IOUT = 0.5A TO 5A 1µs RISE/FALL TIME GND 5 10µs/DIV 4 3 2 SS SYNC 1 BANK 4 VIN IMAX RT RUN A B C D E F G H J K BGA PACKAGE 114 PADS (15mm × 15mm × 4.92mm) LTM8028EY LTM8028IY LTM8028MPY 22 FULL LOAD NOISE AND RIPPLE 500µV/DIV L 1µs/DIV MEASURED PER AN70, 150MHz BW 8028 TA01b PMIC LTC3676/LTC3676-1 Power Management Solution for Application Processor The LTC3676 supports i.MX, PXA and OMAP processors with eight independent rails at appropriate power levels. Other features include interface signals such as the VSTB pin that toggles between programmed run and standby output voltages on up to four rails simultaneously. The device is available in a 40-lead 6mm × 6mm QFN package. APPLICATIONS Start-Up Sequence VIN 2.7V TO 5.5V WAKE LDO2 3676 TA01a TO µPROCESSOR SW2 40 39 38 37 36 35 34 33 32 31 FB_L2 1 30 EN_L2 FB_L2 1 30 EN_L2 VIN_L2 2 29 ON VIN_L2 2 29 ON LDO2 3 28 LDO1 LDO2 3 LDO3 4 27 VIN LDO3 4 VIN_L3 5 28 LDO1 27 VIN 26 FB_L1 VIN_L3 5 25 FB_B2 LDO4 6 VIN_L4 7 24 FB_B1 VIN_L4 7 24 FB_B1 FB_L4 8 23 FB_B4 VDDQIN 8 23 FB_B4 EN_L4 9 22 FB_B3 VTTR 9 EN_L3 10 21 PWR_ON 41 GND LDO4 6 11 12 13 14 15 16 17 18 19 20 UJ PACKAGE UJ PACKAGE 40-LEAD (6mm × 6mm) PLASTIC QFN 40-LEAD (6mm × 6mm) PLASTIC QFN LTC3676EUJ LTC3676IUJ LTC3676HUJ 26 FB_L1 41 GND 25 FB_B2 22 FB_B3 EN_L3 10 21 PWR_ON 11 12 13 14 15 16 17 18 19 20 SW3 2 40 39 38 37 36 35 34 33 32 31 IRQ 1/2 VDDQ TOP VIEW WAKE ENABLES VTTR PWR_ON WAKE ON PGOOD I 2C GND TOP VIEW VSTB 4 EN_B2 SW1 3676 TA01b EN_B3 LDO4 1µF 1ms/DIV PVIN2 VTT 1/2 VDDQ 22µF 1.5A EN_B4 1.5µH 1µF PVIN1 DDR VDDQ 1.5V 22µF 2.5A LDO4 PVIN3 SW4 BUCK4 EN_B1 LDO3 1.5µH LDO3 BUCK3 PVIN4 1µF BUCK1 BUCK2 RSTO VSOC 0.9V TO 1.5V 22µF 1.5A SCL 1.5µH PGOOD SW2 1V/DIV SDA LDO2 VARM 0.9V TO 1.5V 22µF 2.5A SW1 LTC3676-1 1.5µH SW4 3V 300mA SW3 DVDD 1.8V 300mA 1µF VIN SW2 1.2V 300mA LDO1 IRQ VRTC 1.2V 25mA SW3 n WAKE n VSTB n EN_B2 n SW1 n Supports Freescale i.MX6, ARM Cortex, and Other Application Processors Handheld Instruments and Scanners Portable Industrial and Medical Devices Automotive Infotainment High End Consumer Devices Multirail Systems SW4 n EN_B3 n PVIN2 n Regulator start-up is sequenced by connecting outputs to enable pins in the desired order or via the I2C port. System power-on, power-off and reset functions are controlled by pushbutton interface, pin inputs, or I2C. EN_B4 n PVIN1 n PVIN3 n EN_B1 n PVIN4 n RSTO n SCL n The LTC®3676 is a complete power management solution for advanced portable application processor-based systems. The device contains four synchronous step-down DC/DC converters for core, memory, I/O, and system on-chip (SoC) rails and three 300mA LDO regulators for low noise analog supplies. The LTC3676-1 has a ±1.5A buck regulator configured to support DDR termination plus a VTTR reference output. An I2C serial port is used to control regulator enables, power-down sequencing, output voltage levels, dynamic voltage scaling, operating modes and status reporting. PGOOD n DESCRIPTION SDA n FEATURES Quad I2C Adjustable High Efficiency Step Down DC/DC Converters: 2.5A, 2.5A, 1.5A, 1.5A Three 300mA LDO Regulators (Two Adjustable) DDR Power Solution with VTT and VTTR Reference Pushbutton ON/OFF Control with System Reset Independent Enable Pin-Strap or I2C Sequencing Programmable Autonomous Power-Down Control Dynamic Voltage Scaling Power Good and Reset Functions Selectable 2.25MHz or 1.12MHz Switching Frequency Always Alive 25mA LDO Regulator 12µA Standby Current Low Profile 40-Lead 6mm × 6mm × 0.75mm QFN Package DVDD n UJ PACKAGE UJ PACKAGE 40-LEAD (6mm × 6mm) PLASTIC QFN 40-LEAD (6mm × 6mm) PLASTIC QFN LTC3676EUJ-1 LTC3676IUJ-1 LTC3676HUJ-1 23 Power System Management LTC2978A 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement n n n n n n n n n n n n n n n FEATURES DESCRIPTION Sequence, Trim, Margin and Supervise Eight Power Supplies Manage Faults, Monitor Telemetry and Create Fault Logs PMBus Compliant Command Set Supported by LTpowerPlay™ GUI Margin or Trim Supplies to 0.25% Accuracy Fast OV/UV Supervisors per Channel Coordinate Sequencing and Fault Management Across Multiple Chips Automatic Fault Logging to Internal EEPROM Operate Autonomously without Additional Software Internal Temperature and Input Voltage Supervisors Accurate Monitoring of Eight Output Voltages, Input Voltage and Internal Die Temperature I2C/SMBus Serial Interface Can Be Powered from 3.3V, or 4.5V to 15V Programmable Watchdog Timer 100% Compatible with the LTC2978 Available in 64-Pin 9mm × 9mm QFN Package The LTC®2978A is an 8-channel Power System Manager used to sequence, trim (servo), margin, supervise, manage faults, provide telemetry and create fault logs. PMBus commands support power supply sequencing, precision point-of-load voltage adjustment and margining. DACs use a proprietary soft-connect algorithm to minimize supply disturbances. Supervisory functions include overvoltage and undervoltage threshold limits for eight power supply output channels and one power supply input channel, as well as overtemperature and undertemperature limits. Programmable fault responses can disable the power supplies with optional retry after a fault is detected. Faults that disable a power supply can automatically trigger black box EEPROM storage of fault status and associated telemetry. An internal 16-bit ADC monitors eight output voltages, one input voltage, and die temperature. In addition, odd numbered channels can be configured to measure the voltage across a current sense resistor. A programmable watchdog timer monitors microprocessor activity for a stalled condition and resets the microprocessor if necessary. A single wire bus synchronizes power supplies across multiple LTC power system management devices. Configuration EEPROM supports autonomous operation without additional software. APPLICATIONS n n n Computers and Network Servers Industrial Test and Measurement High Reliability Systems Medical Imaging Video 8-Channel PMBus Power System Manager 3.3V** TO INTERMEDIATE BUS CONVERTER ENABLE TOP VIEW VSENSEM6 1 VSENSEP7 2 VSENSEM7 3 VOUT_EN0 4 VOUT_EN1 5 VOUT_EN2 6 VOUT_EN3 7 VOUT_EN4 8 VOUT_EN5 9 VOUT_EN6 10 VOUT_EN7 11 VIN_EN 12 DNC 13 VIN_SNS 14 VPWR 15 VDD33 16 65 GND VIN 4.5V < VIBUS < 15V** VPWR VIN_SNS VDD33 VDACP0 PMBus INTERFACE 48 VSENSEP3 47 VSENSEM2 46 VSENSEP2 45 VDACM2 44 VDACP2 43 VSENSEM1 42 VSENSEP1 41 VDACM1 40 VDACP1 39 VDACP0 38 VDACM0 37 VSENSEM0 36 VSENSEP0 35 REFM 34 REFP 33 ASEL1 WRITE-PROTECT UP PACKAGE 64-LEAD (9mm × 9mm) PLASTIC QFN LTC2978ACUP LTC2978AIUP LTC2978A* SCL R30 R20 VDACM0 DIGITALLY MANAGED POWER SUPPLY VFB LOAD R10 ALERTB VSENSEM0 SGND CONTROL0 VOUT_EN0 RUN/SS GND WP PWRGD WDI/RESETB TO/FROM OTHER LTC2978s VOUT VSENSEP0 VIN_EN SDA 64 VSENSEP6 63 VSENSEM5 62 VSENSEP5 61 VDACM7 60 VDACP7 59 VDACP6 58 VDACM6 57 VDACM5 56 VDACP5 55 VDACP4 54 VDACM4 53 VSENSEM4 52 VSENSEP4 51 VDACM3 50 VDACP3 49 VSENSEM3 n FAULTB00 ASEL0 SHARE_CLK ASEL1 GND 2978a TA01a TO µP RESETB INPUT WATCHDOG TIMER INTERRUPT *SOME DETAILS OMITTED FOR CLARITY ONLY ONE OF EIGHT CHANNELS SHOWN **LTC2978A MAY BE POWERED FROM EITHER AN EXTERNAL 3.3V SUPPLY OR THE INTERMEDIATE BUS Typical ADC Total Unadjusted Error vs Temperature 0.035 VDD33 17 VDD25 18 WP 19 PWRGD 20 SHARE_CLK 21 WDI/RESETB 22 FAULTB00 23 FAULTB01 24 FAULTB10 25 FAULTB11 26 SDA 27 SCL 28 ALERTB 29 CONTROL0 30 CONTROL1 31 ASEL0 32 n ADC VIN = 1.8V 0.030 0.025 ERROR (%) n 0.020 0.015 0.010 0.005 0 –50 –35 –20 –5 10 25 40 55 70 85 100 2978a TA01b TEMPERATURE (°C) 24 Protected by U.S. Patents, including 7382303, 7420359 and 7940091. Switching Regulators—Monolithic LTC3374 8-Channel Parallelable 1A Buck DC/DCs n n n n n n n FEATURES DESCRIPTION 8-Channel Independent Step-Down DC/DCs Master-Slave Configurable for Up to 4A per Output Rail with a Single Inductor Independent VIN Supplies for Each DC/DC (2.25V to 5.5V) All DC/DCs Have 0.8V to VIN Output Range Precision Enable Pin Thresholds for Autonomous Sequencing 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default) Die Temperature Monitor Output Thermally Enhanced 38-Lead QFN (5mm × 7mm) and TSSOP Packages The LTC®3374 is a high efficiency multioutput power supply IC. The DC/DCs consist of eight synchronous buck converters (1A each) all powered from independent 2.25V to 5.5V input supplies. The DC/DCs may be used independently or in parallel to achieve higher currents of up to 4A per output with a shared inductor. The common buck switching frequency may be programmed with an external resistor, synchronized to an external oscillator, or set to a default internal 2MHz clock.The operating mode for all DC/DCs may be programmed via the MODE pin. To reduce input noise the buck converters are phased in 90° steps. Precision enable pin thresholds provide reliable power-up sequencing. The LTC3374 is available in a compact 38-lead 5mm × 7mm QFN package as well as a 38-lead TSSOP package. APPLICATIONS VIN1 BUCK1 VCC 2.7V TO 5.5V LTC3374 TOP VIEW EN8 EN7 MODE VCC TEMP EN2 EN1 TOP VIEW 38 37 36 35 34 33 32 TEMP 1 38 VCC EN2 2 37 MODE EN1 3 36 EN7 FB1 4 35 EN8 VIN1 5 34 FB8 SW1 6 33 VIN8 SW2 7 32 SW8 28 SW7 VIN2 8 31 SW7 27 VIN7 FB2 9 26 FB7 FB3 10 25 FB6 VIN3 11 VIN3 8 24 VIN6 SW3 12 27 VIN6 SW3 9 23 SW6 SW4 13 26 SW6 SW4 10 22 SW5 VIN4 14 25 SW5 VIN4 11 21 VIN5 20 FB5 FB1 1 31 FB8 VIN1 2 30 VIN8 SW1 3 29 SW8 SW2 4 VIN2 5 FB2 6 39 GND FB3 7 FB4 12 EN5 EN6 RT SYNC PGOOD_ALL 13 14 15 16 17 18 19 EN3 n 8-Channel 1A Multioutput Buck Regulator General Purpose Multichannel Power Supplies Industrial/Automotive/Communications EN4 n UHF PACKAGE PACKAGE UHF 38-LEAD (5mm × 7mm) PLASTIC QFN VIN2 BUCK2 30 VIN7 39 GND 29 FB7 28 FB6 FB4 15 24 VIN5 EN4 16 23 FB5 EN3 17 22 EN5 PGOOD_ALL 18 21 EN6 SYNC 19 LTC3374EUHF LTC3374IUHF LTC3374HUHF LTC3374EFE LTC3374IFE LTC3374HFE SLAVE 0.8V TO VIN2 UP TO 1A 0.8V TO VIN7 UP TO 1A 0.8V TO VIN8 UP TO 1A 3374 TA01a Buck Efficiency vs ILOAD 100 90 FE PACKAGE FE PACKAGE 38-LEAD PLASTIC TSSOP 38-LEAD PLASTIC TSSOP MASTER SYNC RT 20 RT 38-LEAD (5mm × 7mm) PLASTIC QFN 0.8V TO VIN1 UP TO 1A EN1 MASTER EN2 • EN3 • EN4 • V SLAVE IN7 EN5 BUCK7 EN6 EN7 EN8 MASTER PGOOD_ALL TEMP MODE VIN8 SLAVE BUCK8 80 EFFICIENCY (%) n 70 60 50 SINGLE BUCK DUAL BUCK TRIPLE BUCK QUAD BUCK FORCED CONTINUOUS MODE VIN = 3.3V, VOUT = 1.8V fOSC = 1MHz, L = 3.3µH 40 30 20 10 0 0 2000 1000 3000 LOAD CURRENT (mA) 4000 3374 TA01b 25 Switching Regulators—Monolithic LT3574 Isolated Flyback Converter without an Opto-Coupler n n n n n n n n n FEATURES DESCRIPTION 3V to 40V Input Voltage Range 0.65A, 60V Integrated NPN Power Switch Boundary Mode Operation No Transformer Third Winding or Opto-Isolator Required for Regulation Improved Primary-Side Winding Feedback Load Regulation VOUT Set with Two External Resistors BIAS Pin for Internal Bias Supply and Power NPN Driver Programmable Soft-Start Programmable Power Switch Current Limit 16-Lead MSOP Package The LT®3574 is a monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation. The part senses the isolated output voltage directly from the primary side flyback waveform. A 0.65A, 60V NPN power switch is integrated along with all control logic into a 16-lead MSOP package. The LT3574 operates with input supply voltages from 3V to 40V, and can deliver output power up to 3W with no external power switch. The LT3574 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation. The output voltage is easily set with two external resistors and the transformer turns ratio. Off-the-shelf transformers are available for many applications. APPLICATIONS n Industrial, Automotive and Medical Isolated Power Supplies 5V Isolated Flyback Converter VIN 12V TO 24V B340A 10µF 357k 0.22µF VIN 3:1 2k 50µH SHDN/UVLO LT3574 • 5.6µH • PMEG6010 51.1k VOUT– 80.6k RFB VOUT+ 5V 0.35A 22µF RREF TC 6.04k RILIM SS SW VC 28.7k GND TEST BIAS 59k 10k 4.7µF 1nF 10nF 3574 TA01 Load Regulation 1.0 TOP VIEW GND TEST GND SW VIN BIAS SHDN/UVLO GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 MSPACKAGE PACKAGE MS 16-LEADPLASTIC PLASTICMSOP MSOP 16-LEAD LT3574EMS LT3574IMS GND TC RREF RFB VC RILIM SS GND OUTPUT VOLTAGE ERROR (%) n VIN = 12V 0 –0.5 –1.0 26 VIN = 24V 0.5 0 100 200 300 400 IOUT (mA) 500 600 700 3574 TA01b Switching Regulators—Monolithic LTC3607 Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator n n n n n n n n n n n n n n n n FEATURES DESCRIPTION High Efficiency: Up to 96% Very Low Quiescent Current: 55µA Total 2.25MHz Constant Frequency Operation Low Dropout Operation: 100% Duty Cycle Low Ripple <30mVP-P Burst Mode® Operation Peak Current-Mode Control Architecture for Excellent Line and Load Transient Response Wide Voltage Input Range 4.5V to 15V 600mA/Channel Rated Output Current 0.6V Reference Allows Low Output Voltages ±1.5% Output Voltage Accuracy Ultralow Shutdown Current: IQ < 1µA Internal Compensation Power Good Outputs Externally Frequency Synchronization (1MHz to 4MHz) Independent Internal Soft-Start for Each Channel Small 16-Lead Thermally Enhanced Thin QFN (3mm × 3mm) and MSE Packages The LTC®3607 is a 15V dual 600mA monolithic synchronous stepdown regulator which has only 55µA quiescent current. Intended for a variety of applications, including dual lithium-ion battery products, it operates from a wide 4.5V to 15V input voltage range. It features a constant 2.25MHz switching frequency, enabling the use of tiny, low cost capacitors and inductors 1mm or less in height. Each output voltage is adjustable from 0.6V to VIN. Internal synchronous power switches provide high efficiency without the need for external Schottky diodes. A user selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest ripple noise. To further maximize battery run time, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle). In shutdown, the device draws <1µA. APPLICATIONS VIN 12V 10µF ×2 VIN RUN2 RUN1 4.7µH VOUT1 5V AT 600mA SW1 LTC3607 SW2 4.7µH 22pF VOUT2 3.3V AT 600mA 22pF 887k VFB2 VFB1 10µF GND 121k 549k 121k 10µF 3607 TA01a Efficiency and Power Loss vs Load Current 100 RUN2 16 15 14 13 PGOOD1 2 11 PGOOD2 17 PGND SVIN 3 10 SGND PGND1 4 9 7 8 SW2 6 PVIN2 5 PGND2 UD PACKAGE PACKAGE UD 16-LEAD (3mm × 3mm) PLASTIC QFN 16-LEAD (3mm × 3mm) PLASTIC QFN LTC3607EUD LTC3607IUD 1 2 3 4 5 6 7 8 80 17 PGND 16 15 14 13 12 11 10 9 MSE MSE PACKAGE PACKAGE 16-LEAD PLASTIC MSOP 16-LEAD PLASTIC MSOP LTC3607EMSE LTC3607IMSE Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611. PGOOD1 MODE/SYNC RUN1 VFB1 VFB2 RUN2 SGND PGOOD2 70 0.1 60 50 40 0.01 30 POWER LOSS (W) 12 SGND MODE/SYNC 1 SVIN PGND1 SW1 PVIN1 PVIN2 SW2 PGND2 SGND 1 VIN = 12V 90 TOP VIEW EFFICIENCY (%) VFB2 VFB1 TOP VIEW RUN1 n Dual Lithium-Ion Battery Supplies Automotive Applications Servers SW1 n PVIN1 n 20 VOUT = 5V VOUT = 3.3V 10 0 1 10 100 LOAD CURRENT (mA) 0.001 1000 3607 TA01b 27 Switching Regulators—Monolithic LTC3630A High Efficiency, 76V 500mA Synchronous Step-Down Converter n n n n n n n n n n n n n FEATURES DESCRIPTION Wide Operating Input Voltage Range: 4V to 76V Synchronous Operation for Highest Efficiency Internal High Side and Low Side Power MOSFETs No Compensation Required Adjustable 50mA to 500mA Maximum Output Current Low Dropout Operation: 100% Duty Cycle Low Quiescent Current: 12µA Wide Output Range: 0.8V to VIN 0.8V ±1% Feedback Voltage Reference Precise RUN Pin Threshold Internal and External Soft-Start Programmable 1.8V, 3.3V, 5V or Adjustable Output Few External Components Required Low Profile (0.75mm) 3mm × 5mm DFN and Thermally Enhanced MSE16 Packages The LTC®3630A is a high efficiency step-down DC/DC converter with internal high side and synchronous power switches that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load. n n n n Industrial Control Supplies Medical Devices Portable Instruments Automotive Avionics PARAMETER TOP VIEW SW 1 16 GND VIN 3 14 GND 17 GND RUN 5 VPRG2 6 VPRG1 7 GND 8 With its wide input range of 4V to 76V, the LTC3630A is a robust converter suited for regulating a wide variety of power sources. A feedback comparator output enables multiple LTC3630As to be paralleled in higher current applications. The LTC3630A is available in the thermally enhanced 3mm × 5mm DFN and the MSE16 packages. APPLICATIONS n The LTC3630A can supply up to 500mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency and for reducing output ripple and component size. The LTC3630A’s combination of Burst Mode® operation, integrated power switches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents. 12 11 10 9 FBO ISET SS VFB LTC3630A LTC3630 Maximum Operating VIN 76V 65V Absolute Maximum VIN 80V 70V 12.5V to 76V Input to 12V Output, 500mA Step-Down Converter 22µH VIN 12.5V TO 76V VIN 2.2µF 1 16 GND NC 2 15 NC VIN 3 NC 4 RUN 5 VPRG2 6 11 ISET VPRG1 7 10 SS GND 8 9 VFB PACKAGE DHC PACKAGE 16-LEAD (5mm (5mm ×× 3mm) 3mm) PLASTIC PLASTIC DFN DFN 16-LEAD (NOTE 6) LTC3630AEDHC LTC3630AIDHC LTC3630AHDHC LTC3630AMPDHC 28 147k 3630a TA01a Efficiency and Power Loss vs Load Current 100 90 VOUT = 12V 80 13 NC 12 FBO SS VPRG1 VPRG2 GND 14 GND 17 GND VFB EFFICIENCY 70 1000 60 50 40 100 POWER LOSS 10 30 20 VIN = 24V 1 VIN = 76V 10 0 0.1 1 10 100 LOAD CURRENT (mA) 1000 3630a TA01b POWER LOSS (mW) SW 22µF 200k LTC3630A ISET FBO OVLO MSE PACKAGE VARIATION: MSE16 (12) VARIATION: MSE16 (12) 16-LEAD PLASTIC MSOP 16-LEAD PLASTIC MSOP LTC3630AEMSE LTC3630AIMSE LTC3630AHMSE LTC3630AMPMSE TOP VIEW SW RUN EFFICIENCY (%) n VOUT 12V 500mA Switching Regulators—Monolithic LT3995 60V, 3A, 2MHz Step-Down Switching Regulator with 2.7µA Quiescent Current n n n n n n n n n n n n n n FEATURES DESCRIPTION Ultralow Quiescent Current: 2.7µA IQ at 12VIN to 3.3VOUT Low Ripple Burst Mode® Operation Output Ripple < 15mVP-P Wide Input Range: Operation from 4.3V to 60V 3A Maximum Output Current Excellent Start-Up and Dropout Performance Adjustable Switching Frequency: 200kHz to 2MHz Synchronizable Between 250kHz to 2MHz Accurate Programmable Undervoltage Lockout Low Shutdown Current: IQ = 700nA Power Good Flag Soft-Start Capability Thermal Shutdown Protection Current Limit Foldback with SS Override Saturating Switch Design: 85mΩ On Resistance Small, Thermally Enhanced 16-Lead MSOP Package The LT®3995 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 60V. Low quiescent current design consumes only 2.7µA of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. The LT3995 can supply up to 3A of load current and has current limit foldback to limit power dissipation during short-circuit. A low dropout voltage of 500mV is maintained when the input voltage drops below the programmed output voltage, such as during automotive cold crank. An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 85mΩ switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. An accurate 1.02V threshold enable pin can be driven directly from a microcontroller or used as a programmable undervoltage lockout. A capacitor on the SS pin provides a controlled inrush current (softstart). A power good flag signals when VOUT reaches 91.6% of the programmed output voltage. The LT3995 is available in a small 16lead MSOP package with exposed pad for low thermal resistance. APPLICATIONS n n n Automotive Battery Regulation Portable Products Industrial Supplies 3.3V Step-Down Converter VIN 4.3V TO 60V VIN OFF ON EN BOOST PG SW 10µF 10nF PDS560 LT3995 SS RT SYNC 182k 0.47µF 8.2µH OUT VOUT 3.3V 3A 47µF 1210 ×2 1M FB GND 10pF 576k 3995 TA01a f = 300kHz No-Load Supply Current 4.5 TOP VIEW FB SS OUT BOOST SW SW SW NC 1 2 3 4 5 6 7 8 17 GND 16 15 14 13 12 11 10 9 MSE MSE PACKAGE PACKAGE 16-LEAD PLASTIC PLASTIC MSOP MSOP 16-LEAD LT3995EMSE LT3995IMSE LT3995HMSE SYNC PG RT EN VIN VIN VIN NC IN REGULATION 4.0 INPUT CURRENT (µA) n 3.5 3.0 2.5 2.0 1.5 1.0 0 5 10 15 20 25 30 35 40 45 50 55 60 INPUT VOLTAGE (V) 3995 TA01b 29 Switching Regulators—Monolithic LT8697 USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation n n n n n n n n n n n n FEATURES DESCRIPTION Wide Input Range: 5V to 42V Low Dropout Under All Conditions: 450mV at 2.1A Accurate 5V Output: ±1.3% Over Full Temperature Range Programmable Cable Drop Compensation Programmable Output Current Limit Output Current Monitor Dual Input Feedback Permits Regulation on Output of USB Switch Forced Continuous Mode for Fast Load Step Response High Efficiency Synchronous Operation at 2MHz: 93% Efficiency at 2.1A, 5VOUT from 12VIN 95% Efficiency at 0.9A, 5VOUT from 12VIN Fast Minimum Switch-On Time: 70ns Adjustable Output from 5.0V to 5.25V Adjustable and Synchronizable: 300kHz to 2.2MHz Small Thermally Enhanced 3mm × 5mm 24-Lead QFN Package The LT®8697 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator designed to power 5V USB applications. A precise output voltage and programmable cable drop compensation maintain accurate 5V regulation at the USB socket at the end of a long cable. Forced continuous operation allows the LT8697 to sink current, further enhancing accurate 5V regulation during load transients. Accurate and programmable output current limit, a power good indicator pin and an output current monitor pin improve system reliability and safety, allow the user to implement latch-off or autoretry functionality and can eliminate the need for a USB switch IC. Dual feedback allows regulation on the output of a USB switch and limits cable drop compensation to a maximum of 5.8V output, protecting USB devices during fault conditions. Thermal shutdown provides additional protection by limiting power dissipation in the IC during an overtemperature fault. The LT8697 is available in a small 24-lead 3mm × 5mm package with an exposed pad for low thermal resistance. APPLICATIONS 2MHz 5V Step-Down Converter with Cable Drop Compensation VIN 6V TO 42V 0.1µF 4.7µF VIN VOUT BST 3.3µH EN/UV INTVCC 1µF 10nF 16.5k SYS ICTRL ISN TR/SS USB5V RT 47µF ×2 1nF + 10k ISP SYNC 0.1Ω 0.018Ω SW LT8697 3 METERS AWG 20 TWISTED PAIR CABLE LOAD PG GND PGND 18.2k 0.1Ω ISP ISN RCBL ICTRL 8697 TA01a Transient Response Through 3 Meters AWG 20 Twisted-Pair Cable 24 23 22 21 SYNC 1 20 USB5V TR/SS 2 19 PG RT 3 5.50 5 18 SYS EN/UV 4 16 BST 15 SW 14 SW PGND 8 13 SW UDD UDDPACKAGE PACKAGE 24-LEAD(3mm (3mm××5mm) 5mm) PLASTIC PLASTIC QFN 24-LEAD QFN LT8697EUDD LT8697IUDD 3 VLOAD 4.75 NC 9 10 11 12 5.00 4 VOUT 4.50 4.25 2 ILOAD 50mA/µs 100µs/DIV 1 0 8697 TA01b CURRENT (A) VIN 6 PGND 7 NC 5.25 17 INTVCC 25 GND VIN 5 30 VLOAD 5V, 2.4A – RCBL TOP VIEW NC n Automotive and Industrial USB Precision 5V Supply NC n VOLTAGE (V) n 80V Sync Buck-Boost Variable Input 2.8V to 80V Up to 250W IIN SET Input Current: Regulate or Monitor CSN CSP BG2 TG1 CSPIN VIN SET Fixed Output 1.3V to 80V Output Current: Regulate or Monitor BG1 CSNIN IOUT SET TG2 LT8705 CSPOUT CSNOUT FBIN FBOUT GND VOUT SET Four Regulation Loops (VOUT, I OUT, VIN and IIN) ® The LT 8705 is the latest in our growing family of single inductor buck-boost controllers. This wide input voltage range, high power controller is capable of delivering efficiencies up to 98.5% for a 48V, 5A output from an input voltage range of 2.8V to 80V. Using a single inductor and 4 external MOSFETs, the LT8705 can deliver output power up to 250W. Input or output voltage or current, any of these can be regulated with the devices’ 4 control loops. Its input regulation loop is ideal for high impedance sources such as solar panels. Features 36V to 80V Input; 48V, 5A Output 100 • Single Inductor • VOUT Range: 1.3V to 80V • VOUT, IOUT, VIN, IIN Feedback Loops • Current Monitors • Synchronous Rectification • Quad N-Channel MOSFET Gate Drivers • Solar-Powered Battery Charger Capable 1-800-4-LINEAR 98.0 97.0 Efficiency (%) • VIN Range: 2.8V to 80V www.linear.com/product/LT8705 99.0 • Very High Efficiency Info & Free Samples 96.0 95.0 94.0 93.0 VIN = 36V 92.0 VIN = 48V 91.0 VIN = 80V 90.0 0.5 1.00 2.00 3.00 4.00 Load Current (A) video.linear.com/138 5.00 , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Switching Regulators—Controller LTC3774 Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing n n n n n n n n n n n n n FEATURES DESCRIPTION Sub-Milliohm DCR Current Sensing Operates with Power Blocks, DRMOS or External Gate Drivers and MOSFETs Supports Phase Shedding and N+1 Phase Redundancy Programmable DCR Temperature Compensation ±0.75% Maximum Total DC Output Error Dual Differential Remote Output Voltage Sense Amplifiers Phase-Lockable Fixed Frequency Range: 200kHz to 1.2MHz VIN Range: 4.5V to 38V VOUT Range: 0.6V to 3.5V Supports Smooth Start-Up into Prebiased Outputs Programmable Soft-Start or VOUT Tracking Hiccup Mode/Soft Recovery from Output Overcurrent 36-Lead (5mm × 6mm) QFN Package The LTC®3774 is a dual PolyPhase® current mode synchronous step-down switching regulator controller that drives power blocks, DRMOS or external gate drivers and FETs. It offers a Linear Technology proprietary technique that enhances the signal-to-noise ratio of the current sense signal, allowing the use of inductors with very low DC winding resistances as the current sense element for maximum efficiency and reduced jitter. APPLICATIONS The LTC3774 is available in a 36-lead (5mm × 6mm) QFN package. High Efficiency Dual Phase 1.5V/60A Step-Down Converter ILIM1 PHSMD FREQ MODE/PLLIN CLKOUT INTVCC VIN TOP VIEW ITEMP2 1 28 ITEMP1 ITH2 2 0.33µH (0.32mΩ DCR) 27 ITH1 VOSNS2– 3 26 VOSNS1– VOSNS2+ 4 25 VOSNS1+ TK/SS2 5 DRMOS 24 TK/SS1 37 GND HIZB2 6 22 PWMEN1 PWM2 8 21 PWM1 RUN2 9 20 RUN1 SNSD1+ SNS1– SNSA1+ PGOOD1 11 12 13 14 15 16 17 18 PGOOD2 PWM1 PWMEN1 SNSPAC1 SNSN1 SNSPDC1 15k 19 GND GND 10 LTC3774 VOSNSN1 23 HIZB1 PWMEN2 7 VIN RUN1, 2 ILIM HI2B1 HI2B2 36 35 34 33 32 31 30 29 SNSA2+ n ILIM2 n SNS2– n Computer Systems Telecom and Datacom Systems Industrial Equipment DC Power Distribution Systems SNSD2+ n The maximum current sense voltage is programmable from 10mV to 30mV. High speed low offset remote sense differential amplifiers and a precise 0.6V reference provide accurate output voltages between 0.6V and 3.5V from a wide 4.5V to 38V input supply range. Soft recovery from output shorts or overcurrent minimizes output overshoot. Burst Mode® operation, continuous and pulse-skipping modes are supported. The constant operating frequency can be synchronized to an external clock or linearly programmed from 200kHz to 1.2MHz. Up to six LTC3774 controllers can be paralleled for 1-, 2-, 3-, 4-, 6-, 8- or 12-phase operation. 300µF 4V + 10k 2200pF 15k VOSNSP1 ITH1 TK/SS1 PHASMD CLKOUT PGOOD1,2 PLLIN PWM2 PWMEN2 SGND VOSNSN2 22µF 50V fIN 500kHz 0.33µH (0.32mΩ DCR) DRMOS SNSPAC2 SNSN2 SNSPDC2 FREQ VOSNSP2 ITH2 TK/SS2 INTVCC 0.1µF 4.7µF VIN 4.5V TO 20V VOUT 1.5V 60A 330µF 4V 37.5k + UHEPACKAGE PACKAGE UHE 36-LEAD (5mm × 6mm) PLASTIC QFN 36-LEAD (5mm × 6mm) PLASTIC QFN LTC3774EUHE LTC3774IUHE 32 3774 TA01a Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6177787, 6580258, 6498466, 6611131, patent pending. 1µA IQ Synchronous Boost Converter Extends Battery Life in Portable Devices Design Note 516 Goran Perica The 12V output converter shown in Figure 1 is designed to run from any typical small battery power source. This design centers around the LTC®3122 boost converter, which can efficiently generate a regulated output up to 15V from a 1.8V to 5.5V input. The LTC3122 includes a 2.5A internal switch current limit and a full complement of features to handle demanding boost applications, including switching frequency programming, undervoltage lockout, Burst Mode® operation or continuous switching mode, and true output disconnect. The integrated synchronous rectifier is turned off when the inductor current approaches zero, preventing reverse inductor current and minimizing power loss at light loads. This unique output disconnect feature is especially important in applications that have long periods of idle time. While idling, the part can be shut down, leaving the output capacitor fully charged and standing by for quick turn-on. In shutdown, the part draws less than 1µA from the input source. VIN 1.8V to 5.5V 4.7µH XAL4030-472 CIN 10µF U1 LTC3122 CAP SW 0.1µF VOUT PGND CVCC 4.7µ PWM/SYNC SD VCC FB RT VC RT 57.6k COUT 0.1µF CAP VIN PGND VIN VOUT 12V R1 1.02M RC R2 86.6k 113k CC 330p dn4gp F01 Figure 1. The 1MHz Operating Frequency and Small Inductor Make This Converter Suitable for Demanding Portable Battery-Powered Applications. 07/13/516 Because the batteries used in portable devices are usually as small as possible, they present high internal impedance under heavy loads, especially close to the end of their discharge cycle. Unlike other boost converters that struggle with high source impedance at startup, the LTC3122 prevents high surge currents at startup. 1.8V to 5.5V Input to 12V Output Boost Regulator The circuit in Figure 1 is designed for high efficiency and small size. The LTC3122 operates at 1MHz to minimize the size of the filter capacitors and boost inductor, and uses Burst Mode operation to maintain high efficiency at light loads, as shown in Figure 2. At heavier loads, the converter can operate in constant frequency mode, resulting in lower input and output ripple. Constant frequency operation can result in lower EMI and is easier to filter. Efficiency can be increased by running the LTC3122 at a relatively low switching frequency. Figure 3 shows the results of reducing the switching frequency from 1MHz to 500kHz. Efficiency can be improved further by increasing the inductor size. Figure 4 shows the increase in efficiency 90 80 70 EFFICIENCY (%) Introduction Boost converters are regularly used in portable devices to produce higher output voltages from lower battery input voltages. Common battery configurations include two to three alkaline or NiMH cells or, increasingly, LiIon batteries, yielding a typical input voltage between 1.8V and 4.8V. 60 50 40 30 20 VIN=2V, BURST MODE VIN=3.3V, BURST MODE VIN=2V, PWM MODE VIN=3.3V, PWM MODE 10 0 0.1 1 10 IOUT (mA) 100 FSW = 1MHz 1000 dn4gpf F02 Figure 2. The High Efficiency of the LTC3122 Boost Converter Extends Battery Life in Portable Applications. L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 90 80 70 EFFICIENCY (%) 60 50 40 30 1MHz, BURST MODE 500kHz, BURST MODE 1MHz, PWM MODE 500kHz, PWM MODE 20 10 0 0.1 1 10 IOUT (mA) 100 1000 dn4gpf F03 Figure 3. The Efficiency is Greatly Affected by the Operating Frequency. At 100mA Load an Additional 4% Can Be Gained by Reducing the Switching Frequency from 1MHz to 500kHz. Battery size should be taken into account when considering inductor size. Using a relatively small inductor running at a high frequency may necessitate a correspondingly higher capacity battery to achieve the same run time at relatively lower efficiency. In other words, space gains achieved with a smaller inductor may be replaced by the need for a bigger battery. Output Disconnect Typical boost converters cannot disconnect the output from the input because of the boost diode. Current always flows from the input through the inductor and boost diode to the output. Therefore the output can not be shorted or disconnected from the input, a significant problem in many applications, especially in shutdown. In contrast, the LTC3122 includes an internal switch that disconnects the boost MOSFET body diode from the output. This also allows for inrush current limiting at turn-on, minimizing the surge currents seen by the input power source. source can lift the output rail to regulation. The input current slowly ramps up. The input current overshoot required to charge the output capacitor is limited to only 200mA and the input power source voltage droop is limited to 0.5V, as shown in Figure 5. Conclusion The LTC3122 boost converter serves the needs of battery-operated applications that require low standby quiescent current and high efficiency. Unlike many other boost converters, it includes features, enableing operation from batteries near full discharge when battery ESR becomes high. Its very low quiescent and shutdown currents, combined with output disconnect, extend battery run time in applications with long idle periods. The LTC3122 includes a complete set of features for high performance battery operated applications and comes in a small, thermally enhanced 3mm × 4mm package. 90 80 70 EFFICIENCY (%) achieved by replacing the 4mm × 4mm boost inductor (XAL4030-472) with a 7mm × 7mm inductor (744-777910 from Würth). The 90% efficiency at 10mA is 5% higher than the efficiency shown in Figure 3. 60 50 40 30 VIN = 2V, BURST MODE VIN = 3.3V, BURST MODE VIN = 2V, PWM MODE VIN = 3.3V, PWM MODE 20 10 0 0.1 1 10 IOUT (mA) 100 1000 FSW = 300kHz dn4gpf F04 Figure 4. With a Lower Switching Frequency and a Larger Inductor, a Smaller Battery Can Be Used. Efficiency Gain Up to 30% in the 1mA to 10mA Load Range (in PWM Mode) Can Significantly Improve Applications That Operate with Light Loads. Figure 5 shows the output of the LTC3122 disconnected in shutdown. The output voltage is pulled to zero by the load following shutdown, and the LTC3122 consumes less than 1µA of current. Start-Up Inrush Current Limiting To simulate a real battery-operated application, the circuit in Figure 1 was tested with 1Ω of equivalent series resistance (ESR) placed between the power source and the LTC3122 circuit. Once the LTC3122 is enabled, it controls the startup so that the input power Data Sheet Download www.linear.com/LT3122 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com dn4gpf F05 Figure 5. Inrush Current Limiting at Turn-On Minimizes Surge Currents Seen by the Input Source. The Output Is Disconnected from Input During Shutdown. For applications help, call (408) 432-1900, Ext. 3788 dn516f LT/AP 0713 111K • PRINTED IN THE USA LINEAR TECHNOLOGY CORPORATION 2013 Intelligent Systems SoCKIT to Me! Don’t Just Elevate, Integrate. Arrow, Altera, and Linear Technology are pleased to offer an unprecedented opportunity for you to learn about the new Altera SoC solutions during our global workshop series. 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