LTM4634 Triple Output 5A/5A/4A Step-Down DC/DC Module Regulator Fea T Descrip T n Three Independent High Efficiency Regulator The LTM 4634 integrates three complete 5A/5A/4A high Channels efficiency switching mode DC/DC converters into one small n I = 5A, I = 4A package. Switching controllers, power FETs, inductors, and OUT1,2 OUT3 n Input Voltage Range: 4.75V to 28V most support components are included. Operating over an n Independent V for Each Channel input voltage range of 4.75V to 28V, the LTM4634 provides IN n V Voltage Range: 0.8V to 5.5V three independent output voltages. V and V are OUT1,2 OUT1 OUT2 n V Voltage Range: 0.8V to 13.5V adjustable from 0.8V to 5.5V, while V is adjustable OUT3 OUT3 n 1.5% Maximum Total DC Output Error from 0.8V to 13.5V. Each output voltage is set by a single n Current Mode Control/Fast Transient Response external resistor. n Frequency Synchronization High switching frequency and a current mode architecture n Output Overvoltage and Overcurrent Protection enable a very fast transient response to line and load n PolyPhase Operation with Current Sharing changes without sacrificing stability. The device supports n General Purpose Temperature Monitors frequency synchronization, multiphase parallel opera- n Soft-Start/Voltage Tracking tion, soft-start and output voltage tracking for supply rail n Power Good Monitors sequencing. n SnPb or RoHS Compliant Finish n Fault protection features include overvoltage protection, 15mm 15mm 5.01mm BGA Package overcurrent protection and temperature monitoring. The a T power module is offered in a space saving, thermally enhanced 15mm 15mm 5.01mm BGA package. The n Telecom, Networking and Industrial Equipment LTM4634 is available with SnPb (BGA) or RoHS compliant n High Density Point of Load Voltage Regulation terminal finish. L, LT, LTC, LTM, Module, PolyPhase, Burst Mode, Linear Technology and the Linear logo are registered trademarks and PowerPath, LTpowerCAD and UltraFast are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258 and 8163643. Other patents pending. Typical a T 24V Input to 3.3V, 5V and 12V Output Regulator 24V Input Efficiency 100 5V 24V IN 4.7F 95 2 40k 10k 10k 6.3V V V V EXTV INTV FREQ/PLLLPF IN1 IN2 IN3 CC CC 90 CNTL PWR PGOOD12 PGOOD3 RUN1 85 V 3.3V OUT1 RUN2 19.1k 1F 80 V RUN3 FB1 LTM4634 75 TK/SS1 V 5V OUT2 TK/SS2 11.5k V = 5V 70 EXTVCC V FB2 24V to 3.3V EFF (750kHz) CH1 TK/SS3 65 24V to 5V EFF (750kHz) CH2 V 12V OUT3 24V to 12V EFF (750kHz) CH3 4.32k 60 V FB3 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 MODE/PLLIN GND SGND 4634 TA01a LOAD CURRENT (A) 4634 TA01b 4634f 1 For more information www.linear.com/LTM4634 EFFICIENCY (%) ion pplica ions pplica ion uresLTM4634 a Te Maxi Mu M r a T p in c F T (Note 1) TOP VIEW CNTL PWR ............................................... 0.3V to 30V FREQ/PLLLPF TKSS2 V V , V , V ........................................... 0.3V to 30V COMP1 FB1 GND TK/SS1 TK/SS3 IN1 IN2 IN3 M PGOOD12 MODE/PLLIN V , V ........................................... 0.3V to 5.75V OUT1 OUT2 V COMP2 FB2 PGOOD3 RUN1 L V ......................................................... 0.3V to 14V RUN2 OUT3 EXTV V CC COMP3 SGND FB3 RUN3 K Switch Voltage (SW1, SW2 and SW3) ...........1V to 30V GND GND J MODE/PLLIN, TK/SS1, TK/SS2, TK/SS3, INTV CC CNTL PWR H FREQ/PLLLPF .......................................0.3V to INTV CC V V V GND GND IN3 IN2 IN1 G COMP1, COMP2, COMP3, V , V , V FB1 FB2 FB3 F (Note 3) .................................................0.3V to INTV CC SW3 SW1 E RUN1, RUN2, RUN3, INTV , EXTV , CC CC SW2 GND D PGOOD12, PGOOD3 ..................................... 0.3V to 6V C TEMP1, TEMP2 ......................................... 0.3V to 0.8V V OUT2 TEMP2 TEMP1 B INTV Peak Output Current ................................100mA CC V V OUT3 OUT1 A Operating Junction Temperature Range 1 2 3 4 5 6 7 8 9 10 11 12 (Note 2) .................................................. 40C to 125C GND GND BGA PACKAGE 144 LEAD (15mm 15mm 5.01mm) Storage Temperature Range .................. 55C to 125C T = 125C, = 7.5C/W, = 4C/W, = 5C/W JMAX JA JCbottom JCtop Peak Solder Reflow Body Temperature ................. 245C DERIVED FROM 95mm 76mm PCB WITH 4-LAYER, WEIGHT = 3.2g JA VALUES DETERMINED PER JESD51-12 o r Der i n F Ma T PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (See Note 2) LTM4634EY PBF SAC305 (RoHS) LTM4634Y e1 BGA 4 40C to 125C LTM4634IY PBF SAC305 (RoHS) LTM4634Y e1 BGA 4 40C to 125C LTM4634IY SnPb (63/37) LTM4634Y e0 BGA 4 40C to 125C Consult Marketing for parts specified with wider operating temperature Recommended LGA and BGA PCB Assembly and Manufacturing ranges. *Device temperature grade is indicated by a label on the shipping Procedures: container. Pad or ball finish code is per IPC/JEDEC J-STD-609. www.linear.com/umodule/pcbassembly LGA and BGA Package and Tray Drawings: Terminal Finish Part Markings: www.linear.com/packaging www.linear.com/leadfree 4634f 2 For more information www.linear.com/LTM4634 ion or ion igura on ings bsolu