LTM4608 Low V , 8A DC/DC Module IN Regulator with Tracking, Margining, and Frequency Synchronization Fea T Descrip T n Complete Standalone Power Supply The LTM 4608 is a complete 8A switch mode DC/DC n 1.5% Output Voltage Regulation power supply. Included in the package are the switching n 2.7V to 5.5V Input Voltage Range controller, power FETs, inductor and all support compo- n 8A DC, 10A Peak Output Current nents. Operating over an input voltage range of 2.7V to n 0.6V Up to 5V Output 5.5V, the LTM4608 supports an output voltage range of n Output Voltage Tracking and Margining 0.6V to 5V, set by a single external resistor. This high ef- n Power Good Tracking and Margining ficiency design delivers up to 8A continuous current (10A n Multiphase Operation peak). Only bulk input and output capacitors are needed. n Parallel Current Sharing The low profile package (2.82mm) enables utilization n Onboard Frequency Synchronization of unused space on the back side of PC boards for high n Spread Spectrum Frequency Modulation density point-of-load regulation. The high switching n Overcurrent/Thermal Shutdown Protection frequency and a current mode architecture enable a very n Small Surface Mount Footprint, Low Profile fast transient response to line and load changes without (9mm 15mm 2.82mm) LGA Package sacrificing stability. The device supports frequency syn- chronization, programmable multiphase and/or spread spectrum operation, output voltage tracking for supply a T rail sequencing and voltage margining. n Telecom, Networking and Industrial Equipment n Fault protection features include overvoltage protection, Storage Systems n overcurrent protection and thermal shutdown. The power Point of Load Regulation module is offered in a compact and thermally enhanced 9mm 15mm 2.82mm LGA package. The LTM4608 is For easier board layout and PCB assembly due to in- RoHS compliant with Pb-free finish. creased spacing between land grid pads, please refer L, LT, LTC, LTM, Linear Technology, the Linear logo, Module, Burst Mode and PolyPhase are registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. to the LTM4608A. All other trademarks are the property of their respective owners. Typical a T 2.7V to 5.5V Input to 1.8V Output DC/DC Module Regulator Efficiency vs Load Current 100 CLKIN 95 CLKIN V V V = 3.3V IN OUT IN V V IN OUT 2.7V TO 5.5V 1.8V 90 SV FB IN 10F 100F V = 5V IN 4.87k SW I TH 85 LTM4608 RUN I THM PGOOD 80 PLLLPF PGOOD TRACK MGN 75 CLKOUT GND SGND 4608 TA01a V = 1.8V OUT 70 0 2 4 6 8 10 LOAD CURRENT (A) 4608 TA01b 4608fd 1 EFFICIENCY (%) ion pplica ions pplica ion uresLTM4608 a Te Maxi Mu M r a T p in c F T (Note 1) V , SV ...................................................... 0.3V to 6V IN IN TOP VIEW A B C D E F G CLKOUT ....................................................... 0.3V to 2V GND V CNTRL GND IN PGOOD, PLLLPF, CLKIN, PHMODE, MODE .. 0.3V to V IN 1 I , I , RUN, FB, TRACK, MGN, BSEL ..... 0.3V to V TH THM IN 2 SW V , V ..................................... 0.3V to (V + 0.3V) OUT SW IN 3 Operating Temperature Range (Note 2)....40C to 85C 4 Junction Temperature ........................................... 125C 5 Storage Temperature Range .................. 55C to 125C 6 CNTRL 7 8 9 10 11 GND V OUT For easier board layout and PCB assembly due to in- LGA PACKAGE 68-LEAD (15mm 9mm 2.82mm) creased spacing between land grid pads, please refer T = 125C, = 25C/W, = 7C/W, = 50C/W, WEIGHT = 1.0g JMAX JA JCbottom JCtop to the LTM4608A. o r Der i n F Ma T LEAD FREE FINISH PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE (NOTE 2) LTM4608EV PBF LTM4608V 40C to 85C 68-Lead (15mm 9mm 2.82mm) LGA LTM4608IV PBF LTM4608V 40C to 85C 68-Lead (15mm 9mm 2.82mm) LGA Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: