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LTM4630A Datasheet(PDF) 1 Page - Linear Technology |
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LTM4630A Datasheet(HTML) 1 Page - Linear Technology |
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1 / 38 page  LTM4630A 1 4630afb For more information www.linear.com/LTM4630A TYPICAL APPLICATION DESCRIPTION Dual 18A or Single 36A DC/DC µModule Regulator The LTM®4630A is a dual 18A or single 36A output switch- ing mode step-down DC/DC µModule® (micromodule) regulator with wider VOUT range and higher efficiency than LTM4630. Included in the package are the switch- ing controllers, power FETs, inductors and all supporting components. Operating from an input voltage range of 4.5V to 18V, the LTM4630A supports two outputs each with an output voltage range of 0.6V to 8V, each set by a single external resistor. Its high efficiency design delivers up to 18A continuous current for each output. Only a few input and output capacitors are needed. The LTM4630A is pin compatible with the LTM4620 and LTM4620A (dual 13A, single 26A) and the LTM4630 (dual 18A, single 36A). The device supports frequency synchronization, multi- phase operation, Burst Mode operation and output voltage tracking for supply rail sequencing and has an onboard temperaturediodefordevicetemperaturemonitoring.High switchingfrequencyandacurrentmodearchitectureenable a very fast transient response to line and load changes without sacrificing stability. Fault protection features include overvoltage and overcurrentprotection.TheLTM4630Aisofferedin16mm × 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm BGA packages. FEATURES APPLICATIONS n Dual 18A or Single 36A Output n Input Voltage Range: 4.5V to 18V (after date code 1720*) n Output Voltage Range: 0.6V to 8V (after date code 1720*) n ±1.5% Maximum Total DC Output Error Over Line, Load and Temperature n Higher Light Load Efficiency and Wider VOUT Range Than LTM4630 n Differential Remote Sense Amplifier n Current Mode Control/Fast Transient Response n Multiphase Parallel Current Sharing Up to 144A n Internal Temperature Monitor n Pin Compatible with the LTM4620A (Dual 13A, Single 26A) and LTM4630 (Dual 18A, Single 36A) n Adjustable Switching Frequency or Synchronization n Overcurrent Foldback Protection n Selectable Burst Mode® Operation, Pulse Skipping Mode Operation n Soft-Start/Voltage Tracking n Output Overvoltage Protection n 16mm × 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm BGA Packages n Telecom and Networking Equipment n Storage and ATCA Cards n Industrial Equipment All registered trademarks and 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. *Maximum VIN = 15V and VOUT = 5.3V with date code before 1720. 36A, 1.2V Output DC/DC µModule Regulator 1.2VOUT and 3.3VOUT Efficiency vs IOUT 4630A TA01a LTM4630A VIN TEMP RUN1 RUN2 TRACK1 TRACK2 fSET 470µF 6.3V 60.4k 100µF 6.3V PHASMD VOUT1 VOUT VOUTS1 VFB1 VFB2 COMP1 COMP2 VOUT2 PGOOD2 MODE_PLLIN PINS UNUSED IN THIS APPLICATION: CLKOUT EXTVCC SW1 SW2 VOUTS2 INTVCC INTVCC PGOOD1 PGOOD 10k SGND GND DIFFP DIFFN DIFFOUT 470µF 6.3V 100µF 6.3V 75k 120k 0.1µF 22µF 25V ×4 + + VIN 4.5V TO 15V 4.7µF LOAD CURRENT (A) 0 65 90 85 80 75 70 100 95 10 12 14 16 18 2 4 6 4630A TA01b 8 5 VIN, 3.3VOUT, 500kHz 5 VIN, 1.2VOUT, 300kHz 12 VIN, 3.3VOUT, 600kHz 12 VIN, 1.2VOUT, 300kHz |
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