POWER LOSS (mW) LTC3630A High Efficiency, 76V 500mA Synchronous Step-Down Converter Fea T Descrip T n Wide Operating Input Voltage Range: 4V to 76V The LTC 3630A is a high efficiency step-down DC/DC n Synchronous Operation for Highest Efficiency converter with internal high side and synchronous power n Internal High Side and Low Side Power MOSFETs switches that draws only 12A typical DC supply current n No Compensation Required while maintaining a regulated output voltage at no load. n Adjustable 50mA to 500mA Maximum Output Current The LTC3630A can supply up to 500mA load current and n Low Dropout Operation: 100% Duty Cycle features a programmable peak current limit that provides n Low Quiescent Current: 12A a simple method for optimizing efficiency and for reduc- n Wide Output Range: 0.8V to V IN ing output ripple and component size. The LTC3630As n 0.8V 1% Feedback Voltage Reference combination of Burst Mode operation, integrated power n Precise RUN Pin Threshold switches, low quiescent current, and programmable peak n Internal and External Soft-Start current limit provides high efficiency over a broad range n Programmable 1.8V, 3.3V, 5V or Adjustable Output of load currents. n Few External Components Required n With its wide input range of 4V to 76V, the LTC3630A is Low Profile (0.75mm) 3mm 5mm DFN and a robust converter suited for regulating a wide variety of Thermally-Enhanced MSE16 Packages power sources. A feedback comparator output enables a T multiple LTC3630As to be paralleled in higher current applications. n Industrial Control Supplies n The LTC3630A is available in the thermally-enhanced Medical Devices n 3mm 5mm DFN and the MSE16 packages. Portable Instruments n Automotive PARAMETER LTC3630A LTC3630 n Avionics Maximum Operating V 76V 65V IN L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks Absolute Maximum V 80V 70V IN and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T Efficiency and Power Loss vs Load Current 100 V = 12V OUT 12.5V to 76V Input to 12V Output, 500mA Step-Down Converter 90 80 22H V OUT V IN EFFICIENCY V SW 12V IN 70 1000 12.5V TO 76V 500mA 2.2F 22F 200k LTC3630A 60 RUN V FB 50 100 POWER LOSS I SS SET 147k 40 FBO V PRG1 10 V 30 PRG2 GND 20 3630a TA01a V = 24V IN 10 1 V = 76V IN 0 0.1 1 10 100 1000 LOAD CURRENT (mA) 3630a TA01b 3630afc 1 For more information www.linear.com/LTC3630A EFFICIENCY (%) ion pplica ions pplica ion uresLTC3630A a T e Maxi Mu M r a T (Note 1) V Supply Voltage ..................................... 0.3V to 80V Operating Junction Temperature Range (Notes 2, 3, 4) IN RUN Voltage................................................. 0.3V to 6V LTC3630AE, LTC3630AI .................... 40C to 125C SS, FBO, I Voltages ................................. 0.3V to 6V LTC3630AH ....................................... 40C to 150C SET V , V , V Voltages ......................... 0.3V to 6V LTC3630AMP ..................................... 55C to 150C FB PRG1 PRG2 Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) MSOP ...............................................................300C p c F T TOP VIEW SW 1 16 GND TOP VIEW NC 2 15 NC SW 1 16 GND V 3 14 GND IN V 3 14 GND IN NC 4 13 NC 17 17 5 12 FBO GND RUN GND RUN 5 12 FBO V 6 11 I SET PRG2 7 10 SS V V 6 11 I PRG1 PRG2 SET GND 8 9 V FB V 7 10 SS PRG1 MSE PACKAGE GND 8 9 V FB VARIATION: MSE16 (12) 16-LEAD PLASTIC MSOP T = 150C, = 45C/W, = 10C/W DHC PACKAGE JMAX JA JC EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB 16-LEAD (5mm 3mm) PLASTIC DFN (NOTE 6) T = 150C, = 43C/W, = 5C/W JMAX JA JC EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3630AEMSE PBF LTC3630AEMSE TRPBF 3630A 16-Lead Plastic MSOP 40C to 125C LTC3630AIMSE PBF LTC3630AIMSE TRPBF 3630A 16-Lead Plastic MSOP 40C to 125C LTC3630AHMSE PBF LTC3630AHMSE TRPBF 3630A 16-Lead Plastic MSOP 40C to 150C LTC3630AMPMSE PBF LTC3630AMPMSE TRPBF 3630A 16-Lead Plastic MSOP 55C to 150C LTC3630AEDHC PBF LTC3630AEDHC TRPBF 3630A 16-Lead (5mm 3mm) Plastic DFN 40C to 125C LTC3630AIDHC PBF LTC3630AIDHC TRPBF 3630A 16-Lead (5mm 3mm) Plastic DFN 40C to 125C LTC3630AHDHC PBF LTC3630AHDHC TRPBF 3630A 16-Lead (5mm 3mm) Plastic DFN 40C to 150C LTC3630AMPDHC PBF LTC3630AMPDHC TRPBF 3630A 16-Lead (5mm 3mm) Plastic DFN 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. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: