POWER LOSS (W) LTC3824 High Voltage Step-Down Controller With 40A Quiescent Current Fea T Descrip T n Wide Input Range: 4V to 60V The LTC 3824 is a step-down DC/DC controller designed n Current Mode Constant Frequency PWM to drive an external P-channel MOSFET. With a wide input n Very Low Dropout Operation: 100% Duty Cycle range of 4V to 60V and a high voltage gate driver, the n Programmable Switching Frequency: LTC3824 is suitable for many industrial and automotive 200kHz to 600kHz high power applications. Constant frequency current mode n Selectable High Efficient Burst Mode Operation: operation provides excellent performance. 40A Quiescent Current The LTC3824 can be configured for Burst Mode operation. n Easy Synchronization Burst Mode operation enhances low current efficiency n 8V, 2A Gate Drive (V > 10V) for Industrial High CC (only 40A quiescent current) and extends battery run Voltage P-Channel MOSFET time. The switching frequency can be programmed up to n Programmable Soft-Start 600kHz and is easily synchronizable. n Programmable Current Limit n Other features include current limit, soft-start, micropower Available in a Small 10-Pin Thermally Enhanced shutdown, and Burst Mode disable. MSE Package The LTC3824 is available in a 10-lead MSE power package. a T L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents n including 5731964. Industrial and Automotive Power Supplies n Telecom Power Supplies n Distributed Power Systems Typical a T 5V/2A Buck Converter Efficiency and Power Loss vs Load Current V IN 5.5V TO 60V 100 2.5 C CAP C + IN 0.1F 33F V = 12V 100V CAP EFFICIENCY IN 90 2.0 V CC R S V = 40V IN 0.025 80 1.5 SENSE LTC3824 70 1.0 R GATE SET 22H V OUT 392k 5V V = 40V IN C 60 0.5 OUT 2A GND POWER LOSS 100F 100pF V = 12V 2 IN 50 0 51 422k 10 100 1000 2000 SYNC/MODE LOAD CURRENT (mA) V FB SS 3824 TA01a V C 80.6k 0.1F 10k 3824 TA01 3.3nF 3824fh 1 For more information www.linear.com/LTC3824 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3824 a Te Maxi Mu M r a T p in c F T (Note 1) TOP VIEW V ...........................................................................65V CC GND 1 10 CAP SS, R , V .............................................................4V SYNC/MODE 2 9 GATE SET FB 11 R 3 8 V SET CC GND V ...............................................................................3V C V 4 7 SENSE C V 5 6 SS FB SYNC/MODE ...............................................................6V MSE PACKAGE V V ..............................................................1V CC SENSE 10-LEAD PLASTIC MSOP T = 150C, = 43C/W, = 3C/W Operating Junction Temperature Range JMAX JA JC EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB (Note 2) .................................................. 55C to 150C Storage Temperature Range ..................... 65 to 150C Lead Temperature (Soldering, 10 sec) .................. 300C Der in F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3824EMSE PBF LTC3824EMSE TRPBF LTBRZ 10-Lead Plastic MSOP 40C to 125C LTC3824IMSE PBF LTC3824IMSE TRPBF LTCGZ 10-Lead Plastic MSOP 40C to 125C LTC3824HMSE PBF LTC3824HMSE TRPBF LTCGZ 10-Lead Plastic MSOP 40C to 150C LTC3824MPMSE PBF LTC3824MPMSE TRPBF LTCGZ 10-Lead Plastic MSOP 55C to 150C LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3824EMSE LTC3824EMSE TR LTBRZ 10-Lead Plastic MSOP 40C to 125C LTC3824IMSE LTC3824IMSE TR LTCGZ 10-Lead Plastic MSOP 40C to 125C LTC3824HMSE LTC3824HMSE TR LTCGZ 10-Lead Plastic MSOP 40C to 150C LTC3824MPMSE LTC3824MPMSE TR LTCGZ 10-Lead Plastic MSOP 55C to 150C 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: