LTM4638 20V , 15A Step-Down DC/DC IN Module Regulator FEATURES DESCRIPTION 2 n Complete Solution in <1cm (Single-Sided PCB) or The LTM 4638 is a complete 15A step-down switch- 2 0.5cm (Dual-Sided PCB) ing mode Module (power module) regulator in a tiny n 6.25mm 6.25mm 5.02mm BGA Package 6.25mm 6.25mm 5.02mm BGA package. Included n Wide Input Voltage Range: 3.1V to 20V in the package are the switching controller, power FETs, n 0.6V to 5.5V Output Voltage inductor and support components. Operating over an n 15A DC Output Current input voltage range of 3.1V to 20V, the LTM4638 sup- n 1.5% Maximum Total DC Output Voltage Error ports an output voltage range of 0.6V to 5.5V, set by a Over Line, Load and Temperature single external resistor. Its high efficiency design delivers n Differential Remote Sensing Amp up to 15A continuous output current. Only bulk input and n Current Mode Control, Fast Transient Response output capacitors are needed. The LTM4638 product video n External Frequency Synchronization is available on the website. n Multiphase Parallel Current Sharing with The LTM4638 supports selectable discontinuous mode MultipleLTM4638s operation and output voltage tracking for supply rail se- n Output Voltage Tracking quencing. Its high switching frequency and current mode n Selectable Discontinuous Mode control enable a very fast transient response to line and n Power Good Indicator load changes without sacrificing stability. n Overvoltage, Overcurrent and Overtemperature Fault protection features include overvoltage, overcurrent Protection and overtemperature protection. APPLICATIONS The LTM4638 is available with SnPb or RoHS compliant terminal finish. n Telecom, Datacom, Networking and All registered trademarks and trademarks are the property of their respective owners. Industrial Equipment n Medical Diagnostic Equipment Click to view associated Video Design Idea. n Data Storage Rack Units and Cards n Test and Debug Systems TYPICAL APPLICATION 1.0V Output Efficiency vs Load Current 95 15A, 1.0V Output DC/DC Module Step-Down Regulator 90 PHMODE CLKOUT V OUT V IN 1.0V V V IN OUT 3.1V TO 20V 22F 85 15A 100F + RUN V 25V OSNS 6.3V LTM4638 INTV PGOOD x2 CC 80 MODE/CLKIN COMPa TRACK/SS COMPb 0.1F 75 FREQ FB V = 5V, 600kHz IN V = 12V, 600kHz V IN GND OSNS 90.9k 70 4638 TA01a 0 3 6 9 12 15 LOAD CURRENT (A) 4638 TA01b Rev. C 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LTM4638 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) (See Pin Functions, Pin Configuration Table) V ............................................................. 0.3V to 22V IN TOP VIEW SW V ............................................................. 0.3V to 6V OUT T SENSE INTV ...................................................... 0.3V to 3.6V CC 7 T + GND SENSE RUN ............................................................ 0.3V to V IN 6 PGOOD PGOOD, FREQ, COMPa, COMPb, V OUT PHMODE 5 PHMODE, CLKOUT, FB .............................. 0.3V to 3.6V RUN 4 V IN MODE/CLKIN, TRACK/SS .....................0.3V to INTV CC INTV + CC V ......................................................... 0.3V to 6V V 3 OSNS OUT MODE/CLKIN V OSNS V ...................................................... 0.3V to 0.3V TRACK/SS OSNS 2 Internal Operating Temperature Range V + CLKOUT OSNS 1 (Notes 2, 5) ............................................ 40C to 125C FB COMPb COMPa FREQ Storage Temperature Range .................. 55C to 125C A B C D E F G BGA PACKAGE Peak Solder Reflow Body Temperature ................. 250C 49-LEAD (6.25mm 6.25mm 5.02mm) T = 125C, = 10C/W, = 4.2C/W, = 16C/W JMAX JCtop JCbottom JA NOTE: 1) VALUES ARE DETERMINED BY SIMULATION PER JESD51 CONDITIONS, WEIGHT 660mg 2) VALUE IS OBTAINED WITH DEMO BOARD JA 3) REFER TO PAGES 21, 22 FOR LAB MEASUREMENT AND DE-RATING INFORMATION ORDER INFORMATION PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (NOTE 2) LTM4638EY PBF SAC305 (RoHS) 4638 e1 BGA 3 40C to 125C LTM4638IY PBF SAC305 (RoHS) 4638 e1 BGA 3 40C to 125C LTM4638IY SnPb 4638 e0 BGA 3 40C to 125C Contact the factory for parts specified with wider operating temperature Recommended LGA and BGA PCB Assembly and ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609. Manufacturing Procedures LGA and BGA Package and Tray Drawings Rev. C 2 For more information www.analog.com