LTM4615 Triple Output, Low Voltage DC/DC Module Regulator Fea T Descrip T n Dual 4A Output Power Supply with 1.5A VLDO The LTM 4615 is a complete 4A dual output switching n Short-Circuit and Overtemperature Protection mode DC/DC power supply plus an additional 1.5A VLDO n Power Good Indicators (very low dropout) linear regulator. Included in the pack- age are the switching controllers, power FETs, inductors, Switching Regulators SectionCurrent Mode Control a 1.5A regulator and all support components. The dual 4A n Input Voltage Range: 2.375V to 5.5V DC/DC converters operate over an input voltage range of n 4A DC Typical, 5A Peak Output Current Each 2.375V to 5.5V, and the VLDO operates from a 1.14V to n 0.8V Up to 5V Output Each, Parallelable 3.5V input. The LTM4615 supports output voltages rang- n 2% Total DC Output Error ing from 0.8V to 5V for the DC/DC converters, and 0.4V n Output Voltage Tracking to 2.6V for the VLDO. The three regulator output voltages n Up to 95% Efficiency are set by a single resistor for each output. Only bulk input n Programmable Soft-Start and output capacitors are needed to complete the design. VLDO Section n The low profile package (2.82mm) enables utilization of VLDO, 1.14V to 3.5V Input Range n unused space on the bottom of PC boards for high density VLDO, 0.4V to 2.6V, 1.5A Output n point of load regulation. High switching frequency and a VLDO, 40dB Supply Rejection at f SW n current mode architecture enables a very fast transient 1% Total DC Output Error n response to line and load changes without sacrificing Small and Very Low Profile Package: stability. The device supports output voltage tracking for 15mm 15mm 2.82mm supply rail sequencing. a T Additional features include overvoltage protection, over- n current protection, thermal shutdown and programmable Telecom and Networking Equipment n soft-start. The power module is offered in a space saving Industrial Power Systems n and thermally enhanced 15mm 15mm 2.82mm LGA Low Noise Applications n package. The LTM4615 is RoHS compliant with Pb-free FPGA, SERDES Power finish. L, LT, LTC, LTM, Linear Technology, the Linear logo, Module and PolyPhase are registered trademarks and VLDO and LTpowerCAD are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131, 6724174. Typical a T Efficiency vs Output Current 1.2V at 4A, 1.5V at 4A and 1V at 1A DC/DC Module Regulator 91 V = 3.3V IN 89 V 3V TO 5.5V IN PGOOD1 PGOOD2 87 V OUT2 10F 10F 1.5V 6.3V 6.3V 85 V V IN1 IN2 10k 10k PGOOD1 PGOOD2 V V OUT1 OUT2 V 83 OUT1 1.5V 1.2V V V OUT1 OUT2 V 1.2V OUT3 4A 4A LTM4615 FB1 FB2 1V 81 22F (V = 1.2V) V TRACK1 TRACK2 V 22F IN 6.3V IN IN 10k 5.76k V 6.3V OUT3 79 RUN/SS1 RUN/SS2 1V AT 1A 100F 1.2V LDO IN LDO OUT 100F 10F 77 6.3V 6.3V EN3 FB3 6.3V PGOOD3 PGOOD3 3.32k 75 0 1 2 3 4 10F GND1 GND2 GND3 10k 4615 TA01a OUTPUT CURRENT (A) V OUT3 4615 TA01b 4615fb 1 For more information www.linear.com/LTM4615 EFFICIENCY (%) ion pplica ions pplica ion uresLTM4615 a Te Maxi Mu M r a T p in c F T (Note 1) Switching Regulators TOP VIEW TRACK1 COMP1 V , V , PGOOD1, PGOOD2 ...................... 0.3V to 6V IN1 IN2 RUN/SS1 PGOOD1 FB1 COMP1, COMP2, RUN/SS1, RUN/SS2 M V , V ,TRACK1, TRACK2 ...................... 0.3V to V V FB1 FB2 IN OUT1 L SW, V ...................................... 0.3V to (V + 0.3V) OUT IN K Very Low Dropout Regulator V IN1 J SW1 LDO IN, PGOOD3, EN3 ................................ 0.3V to 6V GND1 GND1 H LDO OUT ........................................................0.3 to 4V LDO IN G LDO OUT FB3 ........................................ 0.3V to (LDO IN + 0.3V) GND3 EN3 FB3 PGOOD3 F GND3 LDO OUT Short-Circuit.................................... Inde f ini te GND2 FB2 BOOST3 E Internal Operating Temperature Range RUN/SS2 D (Notes 2, 5) ............................................ 40C to 125C V V IN2 OUT2 Junction Temperature ........................................... 125C C Storage Temperature Range .................. 55C to 125C B GND2 A 1 2 3 4 5 6 7 8 9 10 11 12 TRACK2 COMP2 SW2 PGOOD2 LGA PACKAGE 144-LEAD (15mm 15mm 2.82mm) T = 125C, = 2-3C/W, = 15C/W, = 25C/W, JMAX JCbottom JA JCtop VALUES DETERMINED FROM 4 LAYER 76mm 95mm PCB WEIGHT = 1.6g o r Der i n F Ma T LEAD FREE FINISH TRAY PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTM4615EV PBF LTM4615EV PBF LTM4615V 144-Lead (15mm 15mm 2.82mm) LGA 40C to 125C LTM4615IV PBF LTM4615IV PBF LTM4615V 144-Lead (15mm 15mm 2.82mm) LGA 40C to 125C 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: