POWER LOSS (W) LTC3607 Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator Fea T Descrip T n High Efficiency: Up to 96% The LTC 3607 is a 15V dual 600mA monolithic synchro- n Very Low Quiescent Current: 55A Total nous step-down regulator which has only 55A quiescent n 2.25MHz Constant Frequency Operation current. Intended for a variety of applications, including n Low Dropout Operation: 100% Duty Cycle dual lithium-ion battery products, it operates from a wide n Low-Ripple (Typical 30mV ) Burst Mode 4.5V to 15V input voltage range. It features a constant P-P Operation 2.25MHz switching frequency, enabling the use of tiny, n Peak Current-Mode Control Architecture for Excellent low cost capacitors and inductors 1mm or less in height. Line and Load Transient Response Each output voltage is adjustable from 0.6V to V . The IN n Wide Voltage Input Range: 4.5V to 15V internal synchronous power switches provide high ef- n 600mA/Channel Rated Output Current ficiency without the need for external Schottky diodes. n 0.6V Reference Allows Low Output Voltages A user selectable mode input is provided to allow the user n 1.5% Output Voltage Accuracy to trade off ripple noise for light load efficiency Burst n Ultralow Shutdown Current: I < 1A Q Mode operation provides the highest efficiency at light n Internal Compensation loads, while pulse-skipping mode provides the lowest n Power Good Outputs ripple noise. n Externally Frequency Synchronization (1MHz to 4MHz) n To further the maximize battery run time, the P-channel Independent Internal Soft-Start for Each Channel n MOSFETs are turned on continuously in dropout (100% Small 16-Lead Thermally Enhanced Thin QFN duty cycle). In shutdown, the device draws <1A. (3mm 3mm) and MSE Packages L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the a T property of their respective owners. Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611. n Dual Lithium-Ion Battery Supplies n Automotive Applications n Servers Typical a T Efficiency and Power Loss vs Load Current 100 1 V 12V IN V = 12V IN 10F 90 2 PV SV PV IN1 IN IN2 80 RUN1 RUN2 70 0.1 4.7H 4.7H LTC3607 V V 60 OUT1 OUT2 SW1 SW2 5V AT 600mA 3.3V AT 600mA 50 22pF 22pF 40 0.01 30 887k 549k V V FB1 FB2 20 GND 10F 121k 10F V = 5V 121k OUT 10 V = 3.3V OUT 0 0.001 3607 TA01a 1 10 100 1000 LOAD CURRENT (mA) 3607 TA01b 3607fb For more information www.linear.com/LTC3607 1 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3607 a Te Maxi Mu M r a T (Note 1) Operating Junction Temperature Range PV , SV Voltages .................................... 0.3V to 15V IN IN (Notes 2, 7) ............................................ 40C to 125C RUN1, RUN2 Voltages ................. 0.3V to (SV + 0.3V) IN Storage Temperature Range ................... 65C to 150C V , V Voltages ................................... 0.3V to 3.6V FB1 FB2 Lead Temperature (Soldering, 10 sec) MODE/SYNC Voltage ................................. 0.3V to 3.6V MSOP Package .................................................300C PGOOD1, PGOOD2 Voltages ...................... 0.3V to 15V p in c F T TOP VIEW TOP VIEW 16 15 14 13 1 16 PGOOD1 SV IN MODE/SYNC 1 12 SGND PGND1 2 15 MODE/SYNC 3 14 RUN1 SW1 PGOOD1 2 11 PGOOD2 PV 4 13 V 17 IN1 17 FB1 5 12 PV V PGND IN2 FB2 SV 3 10 SGND PGND IN SW2 6 11 RUN2 PGND1 4 9 PGND2 7 10 SGND PGND2 SGND 8 9 PGOOD2 5 6 7 8 MSE PACKAGE 16-LEAD PLASTIC MSOP T = 125C, = 37C/W, = 10C/W JMAX JA JC UD PACKAGE EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB 16-LEAD (3mm 3mm) PLASTIC QFN T = 125C, = 68C/W, = 7.5C/W JMAX JA JC EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3607EUD PBF LTC3607EUD TRPBF LFNB 16-Lead (3mm 3mm) Plastic QFN 40C to 125C (Note 2) LTC3607IUD PBF LTC3607IUD TRPBF LFNB 16-Lead (3mm 3mm) Plastic QFN 40C to 125C (Note 2) LTC3607EMSE PBF LTC3607EMSE TRPBF 3607 16-Lead Plastic MSOP 40C to 125C (Note 2) LTC3607IMSE PBF LTC3607IMSE TRPBF 3607 16-Lead Plastic MSOP 40C to 125C (Note 2) Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: