LTM4603/LTM4603-1 20V, 6A DC/DC Module Regulator with PLL, Output Tracking and Margining Features Description n Complete Switch Mode Power Supply The LTM 4603 is a complete 6A step-down switch mode n Wide Input Voltage Range: 4.5V to 20V DC/DC Module regulator with onboard switching con- n 6A DC Typical, 8A Peak Output Current troller, MOSFETs, inductor and all support components. n 0.6V to 5V Output Voltage The device is housed in a small surface mount 15mm n Output Voltage Tracking and Margining 15mm 2.82mm LGA package. Operating over an input n Remote Sensing for Precision Regulation (LTM4603 voltage range of 4.5V to 20V, the LTM4603 supports an Only) output voltage range of 0.6V to 5V as well as output volt- n Typical Operating Frequency: 1MHz age tracking and margining. The high efficiency design n PLL Frequency Synchronization delivers 6A continuous current (8A peak). Only bulk input n 1.5% Regulation and output capacitors are needed to complete the design. n Current Foldback Protection (Disabled at Start-Up) The low profile (2.82mm) and light weight (1.7g) package n Pin Compatible with the LTM4601 easily mounts on the unused space on the back side of n Pb-Free (e4) RoHS Compliant Package with Gold PC boards for high density point of load regulation. The Finish Pads Module regulator can be synchronized with an external n Ultrafast Transient Response clock for reducing undesirable frequency harmonics and n Current Mode Control allows PolyPhase operation for high load currents. n Up to 93% Efficiency at 5V , 3.3V IN OUT n A high switching frequency and adaptive on-time current Programmable Soft-Start n mode architecture deliver a very fast transient response Output Overvoltage Protection n to line and load changes without sacrificing stability. An Small Footprint, Low Profile (15mm 15mm onboard remote sense amplifier can be used to accurately 2.82mm) Surface Mount LGA Package regulate an output voltage independent of load current. The onboard remote sense amplifier is not available in the a LTM4603-1. The LTM4603/LTM4603-1 are pin compatible n Telecom and Networking Equipment with the 12A LTM4601/LTM4601-1. n Servers L, LT, LTC, LTM, Linear Technology, the Linear logo, Module and PolyPhase are registered n Industrial Equipment trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Point of Load Regulation t ypical a Efficiency vs Load Current with 12V IN 1.5V/6A Power Supply with 4.5V to 20V Input 100 95 CLOCK SYNC V 90 IN TRACK/SS CONTROL 4.5V TO 20V 85 V PLLIN TRACK/SS V IN OUT 80 PGOOD V 1.5V OUT 75 100pF 6A V FB 70 ON/OFF RUN MARG0 MARGIN 65 CONTROL COMP MARG1 12V , 1.2V C IN OUT LTM4603 OUT 60 C IN 12V , 1.5V IN OUT INTV V CC OUT LCL 55 12V , 1.8V 40.2k IN OUT DRV DIFFV CC OUT 12V , 2.5V 50 IN OUT + MPGM V OSNS 12V , 3.3V IN OUT 45 V 12V , 5V OSNS IN OUT 392k 40 f SGND PGND SET 4 7 0 1 2 3 5 6 5% MARGIN LOAD CURRENT (A) 4603 TA01a 4603 TA01b 4603fb 1 EFFICIENCY (%) pplication pplicationsLTM4603/LTM4603-1 a bsolute Maxi Mu M r p in c F (Note 1) INTV , DRV , V , V (V 3.3V TOP VIEW CC CC OUT LCL OUT OUT with Remote Sense Amp)............................. 0.3V to 6V PLLIN, TRACK/SS, MPGM, MARG0, MARG1, PGOOD, f ..............................0.3V to INTV + 0.3V SET CC V f IN SET RUN ............................................................. 0.3V to 5V MARG0 V , COMP ................................................ 0.3V to 2.7V MARG1 FB DRV CC V ............................................................. 0.3V to 20V IN V FB + PGND V , V ..........................0.3V to INTV + 0.3V OSNS OSNS CC PGOOD SGND Operating Temperature Range (Note 2)....40C to 85C + V /NC2* OSNS Junction Temperature ........................................... 125C DIFFV /NC3* OUT Storage Temperature Range .................. 55C to 125C V OUT V OUT LCL V /NC1* OSNS LGA PACKAGE 118-LEAD (15mm 15mm 2.82mm) T = 125C, = 15C/W, = 6C/W JMAX JA JC DERIVED FROM 95mm 76mm PCB WITH 4 LAYERS, WEIGHT = 1.7g JA *LTM4603-1 ONLY o r Der i n F M LEAD FREE FINISH TRAY PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTM4603EV PBF LTM4603EV PBF LTM4603V 118-Lead (15mm 15mm 2.82mm) LGA 40C to 85C LTM4603IV PBF LTM4603IV PBF LTM4603V 40C to 85C 118-Lead (15mm 15mm 2.82mm) LGA LTM4603EV-1 PBF LTM4603EV-1 PBF LTM4603V-1 118-Lead (15mm 15mm 2.82mm) LGA 40C to 85C LTM4603IV-1 PBF LTM4603IV-1 PBF LTM4603V-1 118-Lead (15mm 15mm 2.82mm) LGA 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. See Note 2. For more information on lead free part marking, go to: