LTM4650A Dual 25A or Single 50A DC/DC Module Regulator with 1% DC Accuracy FEATURES DESCRIPTION n Dual 25A or Single 50A Output The LTM 4650A is a dual 25A or single 50A output switching n Input Voltage Range: 4.5V to 16V mode step-down DC/DC Module (micromodule) regula- n tor with 1% total DC output error. Included in the package Output Voltage Range: 0.6V to 5.5V n are the switching controllers, power FETs, inductors and 1% Maximum Total DC Output Error Over Line, all supporting components. Operating from an input volt- Load and Temperature n age range of 4.5V to 16V, the LTM4650A supports two Higher Light Load Efficiency and Wider V Range OUT outputs with an output voltage range of 0.6V to 5.5V, each Than LTM4650-1 set by a single external resistor. Its high efficiency design n Differential Remote Sense Amplifier delivers up to 25A continuous current for each output. n Current Mode Control/Fast Transient Response Fast internal control loop compensation allows for fast n Multiphase Parallel Current Sharing Up to 300A transient response to minimize output capacitance when n Internal Temperature Monitor powering FPGAs, ASICs, and processors. n Pin Compatible with the LTM4620A (Dual 13A, Single 26A) and LTM4630A (Dual 18A, Single 36A) Fault protection features include overvoltage and over- n Adjustable Switching Frequency or Synchronization current protection. The LTM4650A is offered in 16mm n Overcurrent Foldback Protection 16mm 4.41mm LGA and16mm 16mm 5.01mm n Selectable Burst Mode Operation, Pulse-Skipping BGA packages. Mode Operation LTM4650 Product Family Selection Table n Soft-Start/Voltage Tracking V V COMPEN- DC V IN OUT OUT n RANGE RANGE I SATION ACCURACY Output Overvoltage Protection OUT n LTM4650 Internal 16mm 16mm 4.41mm LGA and 1.5% 4.5V to 0.6V to LTM4650-1B 16mm 16mm 5.01mm BGA Packages 15V 1.8V External LTM4650-1A 25A 2 0.8% LTM4650A Internal 4.5V to 0.6V to APPLICATIONS 1% 16V 5.5V LTM4650A-1 External n Telecom and Networking Equipment All registered trademarks and trademarks are the property of their respective owners. Protected n Storage and ATCA Cards by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending. n Industrial Equipment TYPICAL APPLICATION 3.3V Efficiency vs I 50A, 3.3V Output DC/DC Module Regulator OUT OUT 100 10k INTV CC PGOOD 4.7F 95 INTV PGOOD1 PGOOD2 CC V IN V V V OUT IN OUT1 4.5V TO 16V + 90 22F 3.3V/50A 100F 470F V 25V 120k OUTS1 6.3V 6.3V 4 TEMP DIFFOUT 85 TRACK1 V FB1 TRACK2 80 V FB2 13.3k 0.1F INTV f CC SET LTM4650A COMP1 75 COMP2 V 70 PINS NOT USED IN OUT2 12V , 3.3V , 600kHz RUN1 IN OUT + THIS CIRCUIT: 100F 5V , 3.3V , 600kHz DIFFP 470F IN OUT RUN2 CLKOUT 6.3V 6.3V 65 DIFFN PHASMD EXTV 0 10 20 30 40 50 CC SW1 SGND GND MODE PLLIN LOAD CURRENT (A) SW2 4650A TA01a 4650A TA01b V OUTS2 4650afb 1 For more information www.linear.com/LTM4650A EFFICIENCY (%)LTM4650A ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) DIFFP, DIFFN ......................................... 0.3V to INTV CC V (Note 8) .................................................0.3V to 18V IN COMP1, COMP2, V , V (Note 6) ........ 0.3V to 2.7V FB1 FB2 V , V ....................................................1V to 18V SW1 SW2 INTV Peak Output Current ..................................50mA CC PGOOD1, PGOOD2, RUN1, RUN2, Internal Operating Temperature Range INTV , EXTV .......................................... 0.3V to 6V CC CC (Note 2) ............................................. 40C to 125C MODE PLLIN, f , TRACK1, TRACK2, SET Storage Temperature Range .................. 55C to 125C DIFFOUT, PHASMD ............................... 0.3V to INTV CC Peak Package Body Temperature .......................... 245C V , V , V , V (Note 6) ........ 0.3V to 6V OUT1 OUT2 OUTS1 OUTS2 TOP VIEW TOP VIEW TEMP EXTV TEMP EXTV CC CC M M L L V IN K K J J H INTV H INTV CC CC CLKOUT CLKOUT SW2 SW2 SW1 SW1 G G PGOOD1 PGOOD1 PGOOD2 PGOOD2 PHASMD RUN1 SGND PHASMD RUN1 SGND RUN2 RUN2 F F MODE PLLIN MODE PLLIN DIFFOUT DIFFOUT GND COMP1 COMP2 GND COMP1 COMP2 DIFFP DIFFP E E DIFFN DIFFN TRACK1 TRACK1 V V SGND TRACK2 GND SGND FB2 TRACK2 GND FB2 V V FB1 FB1 D D V V f f SGND OUTS2 SGND OUTS2 SET SET C C V V OUTS1 OUTS1 B B V V V OUT1 OUT2 GND OUT2 GND A A 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 BGA PACKAGE LGA PACKAGE 144-LEAD (16mm 16mm 4.41mm) 144-LEAD (16mm 16mm 5.01mm) T = 125C, = 7C/W, = 1.5C/W, = 3.7C/W, + 7C/W T = 125C, = 7C/W, = 1.5C/W, = 3.7C/W, + 7C/W JMAX JA JCbottom JCtop JB JBA JMAX JA JCbottom JCtop JB JBA VALUES DEFINED PER JESD51-12 VALUES DEFINED PER JESD51-12 WEIGHT = 3.6g WEIGHT = 3.8g ORDER INFORMATION