LTM4650 Dual 25A or Single 50A DC/DC Module Regulator FEATURES DESCRIPTION n Dual 25A or Single 50A Output The LTM 4650 is a dual 25A or single 50A output switch- n Input Voltage Range: 4.5V to 15V ing mode step-down DC/DC Module (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, trollers, power FETs, inductors, and all supporting com- Load and Temperature ponents. Operating from an input voltage range of 4.5V n Differential Remote Sense Amplifier to 15V, the LTM4650 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 Frequency Synchronization 25A continuous current for each output. Only a few input n Overcurrent Foldback Protection and output capacitors are needed. The LTM4650 is pin n Multiphase Parallel Current Sharing with Multiple compatible with the LTM4620 (dual 13A, single 26A) and LTM4650s Up to 300A the LTM4630 (dual 18A, single 36A). n Internal Temperature Monitor The device supports frequency synchronization, multi- n Pin Compatible with the LTM4620 (Dual 13A, Single phase operation, Burst Mode operation and output voltage 26A) and LTM4630 (Dual 18A, Single 36A) 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 16mm 16mm 5.01mm BGA Package changes without sacrificing stability. Fault protection features include overvoltage and overcurrent protection. The LTM4650 is offered in a APPLICATIONS 16mm16mm 5.01mm BGA package. n Processor, ASIC and FPGA Core Power All registered trademarks and trademarks are the property of their respective owners. Protected n Telecom and Networking Equipment by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066 n and 6580258. Other patents pending. Storage and ATCA Cards n Industrial Equipment TYPICAL APPLICATION 50A, 1.2V Output DC/DC Module Regulator 1.2V Efficiency vs I OUT OUT 95 V IN V V f = 500KHz IN OUT1 SW 4.5V TO 220F 22F 120k 15V * CERAMIC 25V 90 4V 4 TEMP DIFFOUT 8 RUN1 V OUTS2 470pF 85 RUN2 V FB1 LTM4650 TRACK1 V FB2 80 TRACK2 60.4k 0.1F INTV CC 75 COMP1 10k 4.7F COMP2 PGOOD1 70 PINS NOT USED DIFFP PGOOD2 V = 12V V IN OUT2 IN THIS CIRCUIT: V V = 5V 1.2V f OUT2 IN CLKOUT SET 50A 65 EXTV CC 121k PHASMD SGND GND MODE PLLIN DIFFN 0 10 20 30 40 50 SW1 LOAD CURRENT (A) SW2 4650 TA01a 4650 TA01b V OUTS1 Rev. C 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LTM4650 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V ..............................................................0.3V to 16V IN TEMP EXTV CC V , V ....................................................1V to 16V SW1 SW2 M PGOOD1, PGOOD2, RUN1, RUN2, L INTV , EXTV .......................................... 0.3V to 6V CC CC K MODE PLLIN, f , TRACK1, TRACK2, SET J DIFFOUT, PHASMD ............................... 0.3V to INTV CC H INTV CC CLKOUT V , V , V , V ..................... 0.3V to 6V SW2 OUT1 OUT2 OUTS1 OUTS2 SW1 G PGOOD1 DIFFP, DIFFN ......................................... 0.3V to INTV PGOOD2 CC PHASMD RUN1 SGND RUN2 F MODE PLLIN COMP1, COMP2, V , V (Note 5) ........ 0.3V to 2.7V DIFFOUT FB1 FB2 GND COMP1 COMP2 DIFFP E DIFFN INTV Peak Output Current ................................100mA TRACK1 V CC SGND FB2 TRACK2 GND V FB1 D Internal Operating Temperature Range (Note 2) V f SGND OUTS2 SET C LTM4650E, LTM4650I ....................... 40C to 125C V OUTS1 B LTM4650MP ...................................... 55C to 125C V GND OUT2 A Storage Temperature Range .................. 55C to 125C 1 2 3 4 5 6 7 8 9 10 11 12 Peak Package Body Temperature .......................... 245C BGA PACKAGE 144-LEAD (16mm 16mm 5.01mm) T = 125C, = 7C/W, = 1.5C/W, = 3.7C/W, + 7C/W JMAX JA JCbottom JCtop JB JBA VALUES DEFINED PER JESD 51-12 WEIGHT = 3.2g ORDER INFORMATION PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (Note 2) LTM4650EY PBF SAC305 (RoHS) LTM4650Y e1 BGA 3 40C to 125C LTM4650IY PBF SAC305 (RoHS) LTM4650Y e1 BGA 3 40C to 125C LTM4650IY SnPb (63/37) LTM4650Y e0 BGA 3 40C to 125C LTM4650MPY PBF SAC305 (RoHS) LTM4650Y e1 BGA 3 55C to 125C LTM4650MPY SnPb (63/37) LTM4650Y e0 BGA 3 55C to 125C Contact the factory for parts specified with wider operating temperature ranges. *Device temperature grade is indicated by a label on the shipping container. Pad or ball finish code is per IPC/JEDEC J-STD-609. Recommended LGA and BGA PCB Assembly and Manufacturing Procedures LGA and BGA Package and Tray Drawings Rev. C 2 For more information www.analog.com