LTM4608A Low V , 8A DC/DC Module IN Regulator with Tracking, Margining, and Frequency Synchronization FEATURES DESCRIPTION n Complete Standalone Power Supply The LTM 4608A is a complete 8A switch mode DC/DC power n 1.75% Total DC Output Error (55C to 125C) supply with 1.75% total output voltage error. Included n 2.7V to 5.5V Input Voltage Range in the package are the switching controller, power FETs, n 8A DC, 10A Peak Output Current inductor and all support components. Operating over an n 0.6V Up to 5V Output input voltage range of 2.7V to 5.5V, the LTM4608A sup- n Output Voltage Tracking and Margining ports an output voltage range of 0.6V to 5V, set by a single n Power Good Tracks Margining external resistor. This high efficiency design delivers up n Multiphase Operation to 8A continuous current (10A peak). Only bulk input and n Parallel Current Sharing output capacitors are needed to complete the design. n Onboard Frequency Synchronization The low profile package (2.82mm) enables utilization n Spread Spectrum Frequency Modulation of unused space on the back side of PC boards for high n Overcurrent/Thermal Shutdown Protection density point-of-load regulation. The 0.630mm LGA pads n Current Mode Control/Fast Transient Response with 1.27mm pitch simplify PCB layout by providing stan- n Selectable Burst Mode Operation dard trace routing and via placement. The high switching n Up to 95% Efficiency frequency and current mode architecture enable a very n Output Overvoltage Protection fast transient response to line and load changes without n 9mm 15mm 2.82mm LGA and sacrificing stability. The device supports frequency syn- 9mm 15mm 3.42mm BGA Packages chronization, programmable multiphase and/or spread spectrum operation, output voltage tracking for supply APPLICATIONS rail sequencing and voltage margining. n Telecom, Networking and Industrial Equipment Fault protection features include overvoltage protec- n Storage Systems tion, overcurrent protection and thermal shutdown. The n Point of Load Regulation LTM4608A is offered in 9mm 15mm 2.82mm LGA and L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Module and PolyPhase 9mm 15mm 3.42mm BGA packages. The LTM4608A is are registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents available with SnPb (BGA) or RoHS compliant terminal finish. including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131. TYPICAL APPLICATION Efficiency vs Load Current 100 2.7V to 5.5V Input to 1.8V Output DC/DC Module Regulator V = 1.8V OUT CLKIN 95 V = 3.3V IN CLKIN V V IN OUT 90 V V IN OUT 2.7V TO 5.5V 1.8V V = 5V IN SV FB IN 10F 100F 85 SW I 4.87k TH LTM4608A RUN I THM 80 PGOOD PLLLPF PGOOD 75 TRACK MGN CLKOUT GND SGND 4608A TA01a 70 0 2 4 6 8 10 LOAD CURRENT (A) 4608A TA01b 4608afe 1 For more information www.linear.com/LTM4608A EFFICIENCY (%)LTM4608A ABSOLUTE MAXIMUM RATINGS (Note 1) V , SV ...................................................... 0.3V to 6V Internal Operating Temperature Range IN IN CLKOUT ....................................................... 0.3V to 2V (Note 2) .................................................. 55C to 125C PGOOD, PLLLPF, CLKIN, PHMODE, MODE . 0.3V to V Storage Temperature Range .................. 55C to 125C IN I , I , RUN, FB, TRACK,MGN, BSEL ...... 0.3V to V Peak Solder Reflow Body Temperature ................. 245C TH THM IN V , SW ...................................... 0.3V to (V + 0.3V) OUT IN PIN CONFIGURATION TOP VIEW TOP VIEW A B C D E F G A B C D E F G GND V GND GND V GND IN IN 1 1 RUN RUN SGND SGND 2 2 SW SW CLKOUT CLKOUT 3 3 PLLLPF PLLLPF CLKIN CLKIN 4 4 SV SV PHMODE IN PHMODE IN 5 5 I I THM THM MODE MODE TRACK TRACK 6 6 PGOOD PGOOD I I TH TH FB FB BSEL BSEL 7 7 MGN MGN 8 8 9 9 10 10 11 11 V GND OUT GND V OUT BGA PACKAGE LGA PACKAGE 68-LEAD (15mm 9mm 3.42mm) 68-LEAD (15mm 9mm 2.82mm) T = 125C, = 25C/W, = 7C/W, = 50C/W, WEIGHT = 1.1g T = 125C, = 25C/W, = 7C/W, = 50C/W, WEIGHT = 1.0g JMAX JA JCbottom JCtop JMAX JA JCbottom JCtop ORDER INFORMATION PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (SEE NOTE 2) LTM4608AEV PBF LTM4608AV 40C to 125C LTM4608AIV PBF Au (RoHS) LTM4608AV e4 LGA 3 LTM4608AMPV PBF LTM4608AMPV 55C to 125C LTM4608AEY PBF LTM4608AY 40C to 125C LTM4608AIY PBF SAC305 (RoHS) LTM4608AY e1 BGA 3 LTM4608AMPY PBF LTM4608AY 55C to 125C LTM4608AMPY SnPb (63/37) LTM4608AY e0 Consult Marketing for parts specified with wider operating temperature Recommended LGA and BGA PCB Assembly and Manufacturing ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609. Procedures: www.linear.com/umodule/pcbassembly Device temperature grade is indicated by a label on the shipping LGA and BGA Package and Tray Drawings: www.linear.com/packaging container. Terminal Finish Part Marking: www.linear.com/leadfree 4608afe 2 For more information www.linear.com/LTM4608A