LTM4631 Ultrathin Dual 10A or Single 20A DC/DC Module Regulator Fea T Descrip T n Dual 10A or Single 20A Output The LTM 4631 is a dual 10A or single 20A 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, troller, power FETs, inductors and all supporting compo- Load and Temperature nents. Operating from an input voltage range of 4.5V to n Differential Remote Sense Amplifier 15V, the LTM4631 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 Overcurrent Foldback Protection 10A continuous current for each output. Only a few input n Multiphase Parallel Current Sharing with Multiple and output capacitors are needed. LTM4631s The device supports frequency synchronization, multi- n Frequency Synchronization phase operation, Burst Mode operation and output voltage n Internal Temperature Monitor 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 Ultrathin 16mm 16mm 1.91mm LGA and changes without sacrificing stability. 16mm 16mm 2.51mm BGA Packages Fault protection features include overvoltage and overcurrent protection. The LTM4631 is offered in an a T ultrathin 16mm 16mm 1.91mm LGA and 16mm n 16mm 2.51mm BGA packages. The LTM4631 is avail- Telecom and Networking Equipment n able with SnPb (BGA) or ROHS compliant terminal finish. Storage and ATCA Cards n L, LT, LTC, LTM, Linear Technology, the Linear logo, Module, Burst Mode and PolyPhase Industrial Equipment 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. Typical a T 1.2V Output Efficiency 20A, 1.2V Output Ultrathin Module Regulator vs Load Current INTV CC 90 4.7F 10k 85 PGOOD INTV PGOOD1 MODE PLLIN CC V IN V V IN OUT1 80 4.5V TO 15V + 22F 100F 470F V 25V 120k OUTS1 6.3V 6.3V 4 DIFFOUT TEMP 75 V FB1 TRACK1 LTM4631 V 60.4k FB2 TRACK2 70 0.1F 5V INPUT DIFFP f SET V OUT 12V INPUT V OUT2 1.2V PHASMD 65 PINS NOT USED IN THIS CIRCUIT: 20A 0 2 4 6 8 10 PGOOD2 PGOOD + CLKOUT 100F 470F 147k LOAD CURRENT (A) EXTV SGND GND DIFFN CC 6.3V 6.3V SW1 3060 TA01b SW2 4631 TA01a V OUTS2 4631fb 1 For more information www.linear.com/LTM4631 EFFICIENCY (%) ion pplica ions pplica ion uresLTM4631 a Te Maxi Mu M r a T (Note 1) V ..............................................................0.3V to 16V DIFFP, DIFFN ......................................... 0.3V to INTV IN CC V , V ....................................................1V to 16V COMP1, COMP2, V , V (Note 6) ........ 0.3V to 2.7V SW1 SW2 FB1 FB2 PGOOD1, PGOOD2, RUN1, RUN2, INTV Peak Output Current ................................100mA CC INTV , EXTV .......................................... 0.3V to 6V Internal Operating Temperature Range CC CC MODE PLLIN, f , TRACK1, TRACK2, (Note 2) ............................................. 40C to 125C SET DIFFOUT, PHASMD ............................... 0.3V to INTV Storage Temperature Range .................. 55C to 125C CC V , V , V , V (Note 6) ........ 0.3V to 6V Peak Package Body Temperature .......................... 245C OUT1 OUT2 OUTS1 OUTS2 p in c F T TOP VIEW TOP VIEW TEMP EXTV TEMP EXTV CC CC M M L L K K J J INTV INTV H H CC CC CLKOUT CLKOUT SW2 SW2 SW1 SW1 G PGOOD1 G 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 FB2 TRACK2 GND SGND FB2 TRACK2 GND V V FB1 FB1 D D V V f f SET SGND OUTS2 SET SGND OUTS2 C C V V OUTS1 OUTS1 B B V V V V OUT1 GND OUT2 OUT1 GND OUT2 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 LGA PACKAGE BGA PACKAGE 144-LEAD (16mm 16mm 1.91mm) 144-LEAD (16mm 16mm 2.51mm) 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 JESD 51-12 VALUES DEFINED PER JESD 51-12 WEIGHT = 1.35g WEIGHT = 1.54g 4631fb 2 For more information www.linear.com/LTM4631 ion igura on ings bsolu