POWER LOSS (W) LTM4628 Dual 8A or Single 16A DC/DC Module Regulator FEATURES DESCRIPTION n Complete Standalone Dual Power Supply The LTM 4628 is a complete dual 8A output switching n mode DC/DC power supply and can be easily configured Single 16A or Dual 8A Output n to provide a single 2-phase 16A output. Included in the Wide Input Voltage Range: 4.5V to 26.5V n package are the switching controller, power FETs, inductor, Output Voltage Range: 0.6V to 5.5V n and all supporting components. Operating from an input 1.5% Total DC Output Error n voltage range of 4.5V to 26.5V, the LTM4628 supports Differential Remote Sense Amplifier n two outputs each with an output voltage range of 0.6V to Current Mode Control/Fast Transient Response n 5.5V, set by a single external resistor. Its high efficiency Adjustable Switching Frequency n design delivers 8A continuous current for each output. Overcurrent Foldback Protection Only a few input and output capacitors are needed. n Multiphase Parallel Current Sharing with Multiple LTM4628s The device supports frequency synchronization, multi- n Frequency Synchronization phase operation, Burst Mode operation and output voltage n Internal Temperature Sensing Diode Output tracking for supply rail sequencing. It 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 Small Surface Mount Footprint, Low Profile changes without sacrificing stability. 15mm 15mm 4.32mm LGA and Fault protection features include overvoltage and over- 15mm 15mm 4.92mm BGA Packages current protection. The power module is offered in space saving and thermally enhanced 15mm 15mm 4.32mm APPLICATIONS LGA and 15mm 15mm 4.92mm BGA packages. The n Telecom and Networking Equipment LTM4628 is available with SnPb (BGA) or RoHS compli- n Storage and ATCA Cards ant terminal finish. n Industrial Equipment L, LT, LTC, LTM, Linear Technology, the Linear logo, Module, Burst Mode and PolyPhase are registered and LTpowerCAD is a trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual 8A, 1.5V and 1.2V Output DC/DC Module Regulator 4.7F Efficiency and Power Loss at 12V Input MODE PLLIN CLKOUT INTV EXTV PGOOD1 CC CC V IN 95 2.0 V OUT1 4.5V TO 1.2V V V IN OUT1 1.5V AT 8A 1.8 26.5V 10F 90 1.5V 100F EFFICIENCY * TEMP V 120k OUTS1 35V 470F 10k 6.3V 1.6 4 85 RUN1 DIFFOUT 6.3V 1.4 RUN2 SW1 80 1.2 TRACK1 V * FB1 75 LTM4628 5.1V ZENER TRACK2 V 1.0 FB2 40.2k 70 f COMP1 0.1F SET 0.8 60.4k POWER LOSS PHASMD 65 COMP2 0.6 V OUTS2 60 0.4 V OUT2 100k V OUT2 1.2V AT 8A 55 0.2 100F SW2 6.3V 470F 50 0 PGOOD2 6.3V 0 1 2 3 4 5 6 7 8 SGND GND DIFFP DIFFN LOAD CURRENT (A) * PULL-UP RESISTOR AND 4628 TA01b ZENER ARE OPTIONAL. 4628 TA01a 4628fe 1 For more information www.linear.com/LTM4628 EFFICIENCY (%)LTM4628 ABSOLUTE MAXIMUM RATINGS (Note 1) V ............................................................. 0.3V to 28V DIFFP, DIFFN ......................................... 0.3V to INTV IN CC V , V ....................................................1V to 28V V , V , COMP1, COMP2 (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 ..................... 0.3V to 6V Peak Package Body Temperature .......................... 245C OUT1 OUT2 OUTS1 OUTS2 PIN CONFIGURATION TOP VIEW TOP VIEW M M V V IN IN L L K K EXTV EXTV TEMP CC TEMP CC J J INTV INTVCC CC H H SW1 SW2 SW1 SW2 PHASMD CLKOUT PGOOD2 PGOOD1 PHASMD CLKOUT PGOOD2 PGOOD1 G G SGND SGND MODE PLLIN RUN1 DIFFOUT RUN2 MODE PLLIN RUN1 DIFFOUT RUN2 F F GND GND GND GND TRACK1 COMP1 COMP2 DIFFP DIFFN TRACK1 COMP1 COMP2 DIFFP DIFFN E E V V V V FB1 SGND FB2 TRACK2 FB1 SGND FB2 TRACK2 D D V f V V f V OUTS1 SET SGND OUTS2 OUTS1 SET SGND OUTS2 C C B B V V V GND V OUT1 GND OUT2 OUT1 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 (15mm 15mm 4.32mm) 144-LEAD (15mm 15mm 4.92mm) T = 125C, = 17C/W, = 2.75C/W, T = 125C, = 17C/W, = 2.75C/W, JMAX JCtop JCbottom JMAX JCtop JCbottom + = 11C/W, = 9.5C/W11C/W, + = 11C/W, = 9.5C/W11C/W, JB BA JA JB BA JA = BOARD TO AMBIENT RESISTANCE, VALUES DEFINED PER JESD 51-12 = BOARD TO AMBIENT RESISTANCE, VALUES DEFINED PER JESD 51-12 BA BA WEIGHT = 2.7g WEIGHT = 2.9g ORDER INFORMATION PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (Note 2) LTM4628EV PBF Au (RoHS) LTM4628V e4 LGA 3 40C to 125C LTM4628IV PBF Au (RoHS) LTM4628V e4 LGA 3 40C to 125C LTM4628EY PBF SAC305 (RoHS) LTM4628Y e1 BGA 3 40C to 125C LTM4628IY PBF SAC305 (RoHS) LTM4628Y e1 BGA 3 40C to 125C LTM4628IY SnPb (63/37) LTM4628Y e0 BGA 3 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: www.linear.com/umodule/pcbassembly container. Pad or ball finish code is per IPC/JEDEC J-STD-609. Terminal Finish Part Marking: LGA and BGA Package and T ray Drawings: www.linear.com/leadfree www.linear.com/packaging 4628fe 2 For more information www.linear.com/LTM4628