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LTM4630-1 Datasheet(PDF) 1 Page - Linear Technology |
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LTM4630-1 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 34 page  LTM4645 1 4645f For more information www.linear.com/LTM4645 Typical applicaTion FeaTures DescripTion 25A DC/DC Step-Down µModule Regulator The LTM®4645 is a 25A output switching mode step-down DC/DC µModule® (power module) regulator. Included in the package are the switching controller, power FETs, in- ductor and all supporting components. Operating over an input voltage range of 4.7V to 15V, the LTM4645 supports an output voltage range of 0.6V to 1.8V, set by a single external resistor. Only a few input and output capacitors are needed. Its high efficiency design delivers about 86% efficiency from 12V input to 1.0V output with 25A continuous load current. 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, programmable multiphase operation, N+1 phase redundancy, and output voltage tracking for supply rail sequencing. Fault protection features include overvoltage and overcur- rent protection. The power module is offered in a space saving 9mm × 15mm × 3.51mm BGA package. The LTM4645 is available with SnPb (BGA) or RoHS compli- ant terminal finish. 12VIN, 1VOUT, 25A DC/DC µModule Regulator applicaTions n 4.7V to 15V Input Voltage Range n 0.6V to 1.8V Output Voltage Range n 25A DC Output Current n ±1.2%TotalDCOutputVoltageError(–40°Cto125°C) n HighReliabilityN+1PhaseRedundancySupported n InternalorExternalControlLoopCompensation n Differential Remote Sense Amplifier for Precision Regulation n Current Mode Control/Fast Transient Response n Multiphase Current Sharing Up to 150A n Built-In Temperature Monitoring n Selectable Pulse-Skipping, Burst Mode® Operation n Soft-Start/Voltage Tracking n Frequency Synchronization n Output Overvoltage Protection n Output Overcurrent Foldback Protection n 9mm × 15mm × 3.51mm BGA Package n Telecom, Networking and Industrial Equipment n Point of Load Regulation L , LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, µModule, LTpowerCAD and PolyPhase are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. Efficiency vs Output Current at 1V Output HIZB VIN SVIN FREQ COMPa COMPb TRACK/SS PINS NOT USED IN THIS CIRCUIT: CLKOUT, MODE/PLLIN, PGOOD, PHASMD, PWM, RUN, SW, TEMP+, TEMP– VOUT VOSNS+ VFB VOSNS– 22µF 25V ×2 2.2 4.7µF 6.3V 1µF 0.1µF VIN 6V TO 15V 43.2k DRVCC INTVCC LTM4645 SGND GND 90.9k 4645 TA01a 100µF 6.3V ×4 47pF VOUT 1V 25A LOAD CURRENT (A) 0 80 4645 TA01b 70 10 20 5 15 25 90 100 75 60 65 85 95 5V INPUT 12V INPUT |
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