LTM4611 Ultralow V , 15A DC/DC IN Module Regulator Fea T Descrip T n Complete Switch Mode Power Supply The LTM 4611 is a high density 15A output, switch mode n Input Voltage Range: 1.5V to 5.5V DC/DC buck converter power supply capable of operating n 15A DC Output from very low voltage input supplies. Included in the pack- n Output Voltage Range: 0.8V to 5V age are the buck switching controller, power FETs, induc- n 1.5% Total DC Output Error tor and loop-compensation components. The LTM4611 n Differential Remote Sensing for Precision Regulation delivers up to 15A continuous current at high efficiency n Current Mode Control/ Fast Transient Response from an input voltage of 1.5V up to 5.5V . The output IN IN n Overcurrent Foldback Protection voltage is set between 0.8V and 5V by a resistor. Only a n Parallel Multiple LTM 4611s for Current Sharing few input and output capacitors are needed. n Frequency Synchronization High switching frequency and a current mode architecture n Selectable Pulse-Skipping or Burst Mode Operation enable a very fast transient response to line and load n Soft-Start/Voltage Tracking changes without sacrificing stability. The device supports n Up to 94% Efficiency frequency synchronization, multiphase/current sharing n Output Overvoltage Protection operation, Burst Mode operation and output voltage track- n Small 15mm 15mm 4.32mm LGA Package ing for supply rail sequencing. The LTM4611 is available in a thermally enhanced 15mm a T 15mm 4.32mm LGA package. The LTM4611 is PB-free n Telecom Servers and Networking Equipment and RoHS compliant. n Storage and ATCA Cards L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, PolyPhase and Module are n General Purpose Point of Load Regulation registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210. Click to view associated TechClip Videos. Typical a T 1.5V to 5.5V , 15A Step-Down DC/DC Module Regulator Efficiency vs Load Current IN IN 96 V IN 1.5V TO 5.5V 94 22F C SS 3 92 0.1F V PGOOD IN ** V OUT TRACK/SS V STEP-DOWN 90 OUT 5V , 3.3V C * 15A IN OUT FF LTM4611 V 3.3V , 2.5V FB 88 IN OUT 2.5V , 1.5V IN OUT 100F* V RUN OUT LCL 86 2.5V , 1.2V IN OUT 4 3.3V , 1V IN OUT MODE PLLIN DIFFV OUT 84 1.5V , 0.9V IN OUT + V 5V , 1V OSNS IN OUT 82 V OSNS 80 SGND GND C * P R ** FB *SEE TABLE 5 78 0 5 15 **SEE TABLE 1 10 4611 TA01 LOAD CURRENT (A) 4611 TA01b 4611fb 1 For more information www.linear.com/LTM4611 EFFICIENCY (%) ion pplica ions pplica ion uresLTM4611 a Te Maxi Mu M r a T p in c F T (Note 1) TOP VIEW Terminal Voltages INTV TRACK/SS CC V ........................................................... 0.2V to 6V V MODE PLLIN RUN COMP IN IN 1 2 3 4 5 6 7 8 9 10 11 12 V with OUT A DIFF AMP ....0.1V to the Lesser of (V + 0.1V) or 4V IN V IN B PLLFLTR/f SET V without OUT C DIFF AMP ..0.1V to the Lesser of (V + 0.1V) or 5.5V MTP1-9 IN D RUN, INTV , V ..........................................6V CC OUT LCL E INTV CC MODE PLLIN, PLLFLTR/f , SET F V FB TRACK/SS, V , V +, GND OSNS OSNS G PGOOD PGOOD ................................................. 0.3V to 5.5V H SGND COMP, V ............................................. 0.3V to 2.7V FB J V + OSNS Terminal Currents K DIFFV OUT DIFFV ............................................. 10mA to 1mA V OUT OUT L V OUT LCL Temperatures M V OSNS Operating Junction Temperature Range LGA PACKAGE (Note 2) ............................................ 40C to 125C 133-LEAD (15mm 15mm 4.32mm) T = 125C Storage Temperature Range .............. 55C to 125C J(MAX) = 26C/W, = 2.3C/W, = 10C/W, = 14C/W JCtop JCbottom JB JA Peak Solder Reflow Body Temperature VALUES DETERMINED PER JESD51-12 (Note 3) ............................................................ 250C WEIGHT = 2.6 GRAMS o r Der i n F Ma T LEAD FREE FINISH TRAY PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTM4611EV PBF LTM4611EV PBF LTM4611V 40C to 125C 133-Lead (15mm 15mm 4.32mm) LGA LTM4611IV PBF LTM4611IV PBF LTM4611V 40C to 125C 133-Lead (15mm 15mm 4.32mm) 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: