LTM4631 Ultrathin Dual 10A or Single 20A DC/DC µModule Regulator FeaTuresDescripTion n Dual 10A or Single 20A Output The LTM®4631 is a dual 10A or single 20A output switch- n Input Voltage Range: 4.5V to 15V ing mode step-down DC/DC µModule® (power module) n Output Voltage Range: 0.6V to 1.8V regulator. Included in the package are the switching con- n ±1.5% Maximum Total DC Output Error Over Line, troller, power FETs, inductors and all supporting compo- Load and Temperature nents. Operating from an input voltage range of 4.5V to n Differential Remote Sense Amplifier 15V, the LTM4631 supports two outputs each with an n Current Mode Control/Fast Transient Response output voltage range of 0.6V to 1.8V, each set by a single n Adjustable Switching Frequency external resistor. Its high efficiency design delivers up to n Overcurrent Foldback Protection 10A continuous current for each output. Only a few input n Multiphase Parallel Current Sharing with Multiple and output capacitors are needed. LTM4631s The device supports frequency synchronization, multi- n Frequency Synchronization phase operation, Burst Mode operation and output voltage n Internal Temperature Monitor tracking for supply rail sequencing and has an onboard n Selectable Burst Mode® Operation temperature diode for device temperature monitoring. n Soft-Start/Voltage Tracking High switching frequency and a current mode architec- n Output Overvoltage Protection ture enable a very fast transient response to line and load n Ultrathin 16mm × 16mm × 1.91mm LGA and changes without sacrificing stability. 16mm × 16mm × 2.51mm BGA Packages Fault protection features include overvoltage and overcurrent protection. The LTM4631 is offered in an applicaTions ultrathin 16mm × 16mm × 1.91mm LGA and 16mm × n Telecom and Networking Equipment 16mm × 2.51mm BGA packages. The LTM4631 is avail- n Storage and ATCA Cards able with SnPb (BGA) or ROHS compliant terminal finish. n Industrial Equipment L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending. Typical applicaTion1.2V Output Efficiency20A, 1.2V Output Ultrathin µModule Regulatorvs Load Current INTVCC 90 4.7µF 10k PGOOD 85 MODE_PLLIN INTVCC PGOOD1 VIN VIN VOUT1 4.5V TO 15V 22µF + 80 25V 120k V 100µF 470µF OUTS1 6.3V 6.3V ×4 TEMP DIFFOUT 75 V TRACK1 FB1 EFFICIENCY (%) LTM4631 V 60.4k TRACK2 FB2 70 0.1µF 5V INPUT f DIFFP SET VOUT 12V INPUT PHASMD VOUT2 1.2V PINS NOT USED IN THIS CIRCUIT: 65 PGOOD2 PGOOD 20A 0 2 4 6 8 10 CLKOUT + 100µF 470µF EXTV 147k LOAD CURRENT (A) CC SGND GND DIFFN 6.3V 6.3V SW1 3060 TA01b SW2 4631 TA01a VOUTS2 4631fb For more information www.linear.com/LTM4631 1 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information typical Applications Package Description Revision History Package PHoto Design Resources Related Parts
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