POWER LOSS (W) LTC3624/LTC3624-2 17V, 2A Synchronous Step-Down Regulator with 3.5A Quiescent Current Fea T Descrip T n Wide V Range: 2.7V to 17V The LTC 3624/LTC3624-2 is a high efficiency 17V, 2A IN n Wide V Range: 0.6V to V synchronous monolithic step-down regulator. The switch- OUT IN n 95% Max Efficiency ing frequency is fixed to 1MHz (LTC3624) or 2.25MHz n Low I : 3.5A, Zero-Current Shutdown (LTC3642-2) with a 40% synchronization range. The Q n Constant Frequency (1MHz/2.25MHz) regulator features ultralow quiescent current and high n Fixed V Options Available efficiency over a wide V range. OUT OUT n Low Dropout Operation (100% Duty Cycle) with The step-down regulator operates from an input voltage Ultralow I Q range of 2.7V to 17V and provides an adjustable output n 2A Rated Output Current range from 0.6V to V while delivering up to 2A of output IN n 1% Output Voltage Accuracy current. A user-selectable mode input is provided to allow n Current Mode Operation for Excellent Line and Load the user to trade off ripple noise for light load efficiency Transient Response Burst Mode operation provides the highest efficiency at n Synchronizable to External Clock light loads, while pulse-skipping mode provides the lowest n Pulse-Skipping, Forced Continuous, Burst Mode voltage ripple. The MODE pin can also be used to sync the Operation switching frequency to an external clock. n Internal Compensation and Soft-Start LTC3624/LTC3624-2 Options n Overtemperature Protection PART NAME FREQUENCY V OUT n Compact 8-Lead DFN (3mm 3mm) Package LTC3624 1MHz Adjustable LTC3624-3.3 1MHz 3.3V a T LTC3624-5 1MHz 5V n Battery Powered Equipment LTC3624-2 2.25MHz Adjustable n Portable Instrumentation LTC3624-23.3 2.25MHz 3.3V n Emergency Radios LTC3624-25 2.25MHz 5V n General Purpose Step-Down Supplies 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 property of their respective owners. Protected by U.S. Patents, including 5481178, 6580258, 6498466, 6611131, 6177787, 5705919, 5847554, 6703692. Typical a T Efficiency and Power Loss vs Load 100 1.2 5V V with 800mA Burst Clamp, f = 1MHz OUT SW 90 1.0 80 V = 5V OUT 3.3H V OUT V IN V SW 5V 70 BURST MODE OPERATION IN 5.6V TO 17V 0.8 2A 10F LTC3624-5 60 RUN FB 47F 50 0.6 MODE/SYNC 40 36242 TA01a INTV CC 0.4 GND 30 2.2F V = 12V IN 20 0.2 V = 8V IN 10 V = 6V IN FREQ = 1MHz 0 0 1 2 0 0.5 1.5 LOAD CURRENT (A) 3624 TA01b 36242fc 1 For more information www.linear.com/LTC3624 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3624/LTC3624-2 a Te Maxi Mu M r a T (Note 1) Operating Junction Temperature Range V Voltage ................................................. 0.3V to 17V IN (Notes 2, 5) ............................................ 40C to 150C RUN Voltage............................................... 0.3V to 17V Storage Temperature Range .................. 65C to 150C MODE/SYNC, FB Voltages ............................ 0.3V to 6V INTV , PGOOD Voltages ............................ 0.3V to 6V CC p in c F T TOP VIEW TOP VIEW 1 SW 12 GND SW 1 8 GND 2 SW 11 GND 13 3 10 MODE/SYNC V IN V 2 7 MODE/SYNC IN 9 GND V 4 9 INTV IN CC GND RUN 3 6 INTV CC RUN 5 8 FB PGOOD 4 5 FB PGOOD 6 7 NC MSE PACKAGE DD PACKAGE 12-LEAD PLASTIC MSOP 8-LEAD (3mm 3mm) PLASTIC DFN T = 150C, = 40C/W, = 10C/W JMAX JA JC T = 125C, = 43C/W, = 5.5C/W EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB FOR JMAX JA JC EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB OPTIMAL THERMAL PERFORMANCE o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3624EDD PBF LTC3624EDD TRPBF LGJF 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3624IDD PBF LTC3624IDD TRPBF LGJF 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3624EMSE PBF LTC3624EMSE TRPBF 3624 12-Lead Plastic MSOP 40C to 125C LTC3624IMSE PBF LTC3624IMSE TRPBF 3624 12-Lead Plastic MSOP 40C to 125C LTC3624HMSE PBF LTC3624HMSE TRPBF 3624 12-Lead Plastic MSOP 40C to 150C LTC3624EDD-3.3 PBF LTC3624EDD-3.3 TRPBF LGRG 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3624IDD-3.3 PBF LTC3624IDD-3.3 TRPBF LGRG 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3624EMSE-3.3 PBF LTC3624EMSE-3.3 TRPBF 362433 12-Lead Plastic MSOP 40C to 125C LTC3624IMSE-3.3 PBF LTC3624IMSE-3.3 TRPBF 362433 12-Lead Plastic MSOP 40C to 125C LTC3624HMSE-3.3 PBF LTC3624HMSE-3.3 TRPBF 362433 12-Lead Plastic MSOP 40C to 150C LTC3624EDD-5 PBF LTC3624EDD-5 TRPBF LGRD 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3624IDD-5 PBF LTC3624IDD-5 TRPBF LGRD 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3624EMSE-5 PBF LTC3624EMSE-5 TRPBF 36245 12-Lead Plastic MSOP 40C to 125C LTC3624IMSE-5 PBF LTC3624IMSE-5 TRPBF 36245 12-Lead Plastic MSOP 40C to 125C LTC3624HMSE-5 PBF LTC3624HMSE-5 TRPBF 36245 12-Lead Plastic MSOP 40C to 150C LTC3624EDD-2 PBF LTC3624EDD-2 TRPBF LGMN 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3624IDD-2 PBF LTC3624IDD-2 TRPBF LGMN 8-Lead (3mm 3mm) Plastic DFN 40C to 125C 36242fc 2 For more information www.linear.com/LTC3624 ion or ion igura on ings bsolu