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LTM4644 Datasheet(PDF) 1 Page - Linear Technology |
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LTM4644 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 36 page  LTM4650A-1 1 4650a1f For more information www.linear.com/LTM4650A-1 TYPICAL APPLICATION FEATURES DESCRIPTION Dual 25A or Single 50A DC/DC µModule Regulator with 1% DC Accuracy The LTM®4650A-1 is a dual 25A or single 50A output switching mode step-down DC/DC µModule® (micromod- ule) regulator with ±1% total DC output error. Included in the package are the switching controllers, power FETs, inductors and all supporting components. Operating from an input voltage range of 4.5V to 16V, the LTM4650A-1 supports two outputs with an output voltage range of 0.6V to 5.5V, each set by a single external resistor. Its high ef- ficiency design delivers up to 25A continuous current for each output. Only a few input and output capacitors are needed. Adjustable control loop compensation allows for fast transient response to minimize output capacitance when powering FPGAs, ASICs, and processors. Fault protection features include overvoltage and overcur- rent protection. The LTM4650A-1 is offered in 16mm × 16mm × 5.01mm BGA package. 50A, 3.3V Output DC/DC µModule Regulator APPLICATIONS n Dual 25A or Single 50A Output n Input Voltage Range: 4.5V to 16V n Output Voltage Range: 0.6V to 5.5V n ±1% Maximum Total DC Output Error Over Line, Load and Temperature n Higher Light Load Efficiency and Wider VOUT Range Than LTM4650-1 n Adjustable Control Loop Compensation n Differential Remote Sense Amplifier n Current Mode Control/Fast Transient Response n Multiphase Parallel Current Sharing Up to 300A n Internal Temperature Monitor 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 × 5.01mm BGA Package n Telecom and Networking Equipment n Storage and ATCA Cards n Industrial Equipment L , LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode, PolyPhase and LTpowerCAD 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. 3.3VOUT Efficiency vs IOUT LOAD CURRENT (A) 0 65 90 85 80 75 70 100 95 20 30 40 50 10 4650a1 TA01b 5 VIN, 3.3VOUT, 600kHz 12 VIN, 3.3VOUT, 600kHz LTM4650 Product Family Selection Table VIN RANGE VOUT RANGE IOUT COMPEN- SATION DC VOUT ACCURACY LTM4650 4.5V to 15V 0.6V to 1.8V 25A × 2 Internal 1.5% LTM4650-1B External LTM6450-1A 0.8% LTM4650A 4.5V to 16V 0.6V to 5.5V Internal 1% LTM4650A-1 External 4650a1 TA01a LTM4650A-1 VIN TEMP RUN1 RUN2 TRACK1 TRACK2 fSET 470µF 6.3V 13.3k 100µF 6.3V PHASMD VOUT1 VOUT 3.3V/50A 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 RTH CTH 470µF 6.3V 100µF 6.3V 120k 0.1µF 22µF 25V ×4 + + VIN 4.5V TO 16V 4.7µF INTVCC |
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