LTM4604 Low Voltage, 4A DC/DC Module Regulator with Tracking FEATURES DESCRIPTION n Complete Standalone Power Supply The LTM 4604 is a complete 4A switch mode step-down n Wide Input Voltage Range: 2.375V to 5.5V Module (micromodule) regulator. Included in the pack- n age are the switching controller, power FETs, inductor and 4A DC, 5A Peak Output Current n all support components. Operating over an input voltage 0.8V to 5V Output n range of 2.375V to 5.5V, the LTM4604 supports an output Output Voltage Tracking n voltage range of 0.8V to 5V, set by a single resistor. This 2% Maximum Total DC Output Error TM n high efficiency design delivers up to 4A continuous cur- UltraFast Transient Response n rent (5A peak). Only bulk input and output capacitors are Current Mode Control n needed to complete the design. Current Foldback Protection, Parallel/Current Sharing n Small and Very Low Profile Package: The low profile package (2.32mm) enables utilization of 15mm 9mm 2.32mm LGA unused space on the bottom of PC boards for high density point of load regulation. High switching frequency and a current mode architecture enable a very fast transient APPLICATIONS response to line and load changes without sacrificing n Telecom and Networking Equipment stability. The device supports output voltage tracking for n Servers, ATCA Cards supply rail sequencing. n Industrial Equipment Fault protection features include foldback current protec- tion, thermal shutdown and a programmable soft-start function. The LTM4604 is offered in a RoHS compliant 15mm 9mm 2.32mm LGA package. Please refer to the LTM4604A for easier PC board layout All registered trademarks and trademarks are the property of their respective owners. and assembly due to increased spacing between land grid pads. TYPICAL APPLICATION 3.3V to 2.5V/4A Module Regulator Efficiency vs Output Current 100 V IN V = 3.3V IN 3.3V V = 2.5V OUT 95 10F 90 6.3V V IN V OUT 85 PGOOD V 2.5V OUT 4A LTM4604 80 22F COMP FB 6.3V V RUN/SS TRACK 75 IN 2 2.37k GND 70 4604 TA01a 65 1 2 4 0 3 OUTPUT CURRENT (A) 4604 G02 Rev. C 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LTM4604 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V , PGOOD ................................................. 0.3V to 6V IN TRACK PGOOD COMP, RUN/SS, FB, TRACK ........................ 0.3V to V A B C D E F G IN V IN SW, V ...................................... 0.3V to (V + 0.3V) OUT IN 1 COMP Operating Temperature Range (Note 2)....40C to 85C RUN/ 2 FB SW SS Junction Temperature ........................................... 125C 3 GND Storage Temperature Range .................. 55C to 125C 4 5 Reflow (Peak Body) Temperature ..........................260C 6 7 8 9 10 11 GND V OUT LGA PACKAGE For easier PC board layout and assembly due to 66-PIN (15mm 9mm 2.32mm) T = 125C, = 25C/W, = 7C/W, JMAX JA JC(BOT) increased spacing between land grid pads, please refer = 50C/W, WEIGHT = 1.0g JC(TOP) to the LTM4604A. ORDER INFORMATION PACKAGE MSL TEMPERATURE RANGE LEAD FREE FINISH TRAY PART MARKING* TYPE RATING (SEE NOTE 2) LTM4604EV PBF LTM4604EV PBF LTM4604V LGA 4 40C to 85C LTM4604IV PBF LTM4604EV PBF LTM4604V Contact the factory 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 Device temperature grade is indicated by a label on the shipping container. LGA and BGA Package and Tray Drawings ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range (Note 2), otherwise specifications are at T = 25C. V = 5V unless otherwise noted. See Figure15. A IN SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS l V Input DC Voltage 2.375 5.5 V IN(DC) V Output Voltage, Total Variation C = 10F, C = 22F 3, R = 5.69k (Note 3) OUT(DC) IN OUT FB with Line and Load V = 2.375V to 5.5V, I = 0A to 4A, 0C T 85C 1.478 1.5 1.522 V IN OUT A V = 2.375V to 5.5V, I = 0A to 4A l 1.470 1.5 1.522 V IN OUT Input Specifications V Undervoltage Lockout I = 0A 1.75 2 2.3 V IN(UVLO) OUT Threshold I Peak Input Inrush Current at I = 0A, C = 10F, C = 22F 3, INRUSH(VIN) OUT IN OUT Start-Up RUN/SS = 0.01F, V = 1.5V OUT V = 3.3V 0.7 A IN V = 5V 0.7 A IN I Input Supply Bias Current V = 3.3V, No Switching 60 A Q(VIN NOLOAD) IN V = 3.3V, V = 1.5V, Switching Continuous 28 mA IN OUT V = 5V, No Switching 100 A IN V = 5V, V = 1.5V, Switching Continuous 35 mA IN OUT Shutdown, RUN = 0, V = 5V 7 A IN Rev. C 2 For more information www.analog.com