LTC3630 High Efficiency, 65V 500mA Synchronous Step-Down Converter Fea T Descrip T n Wide Operating Input Voltage Range: 4V to 65V The LTC 3630 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 LTC3630 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 LTC3630s 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 65V, the LTC3630 is a Low Profile (0.75mm) 3mm 5mm DFN and robust converter suited for regulating a wide variety of Thermally-Enhanced MSE16 Packages power sources. Additionally, the LTC3630 includes a precise a T run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environ- n Industrial Control Supplies ment. A feedback comparator output enables multiple n Medical Devices LTC3630s to be paralleled in higher current applications. n Distributed Power Systems n Portable Instruments The LTC3630 is available in the thermally-enhanced n Battery-Operated Devices 3mm 5mm DFN and the MSE16 packages. n Automotive L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks n and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the Avionics property of their respective owners. Typical a T Efficiency vs Load Current 100 V = 3.3V OUT V = 12V IN 4V to 65V Input to 3.3V Output, 500mA Step-Down Converter 90 47H V 80 OUT V IN 3.3V V SW IN 4V TO 65V 100F 500mA 2.2F LTC3630 70 2 V = 65V IN RUN V FB 60 SS V V PRG1 PRG2 50 FBO I SET GND 3630 TA01a 40 I = 220k 220pF SET I = OPEN SET 30 0.1 1 10 100 1000 LOAD CURRENT (mA) 3630 TA01b 3630fd 1 For more information www.linear.com/LTC3630 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3630 a Te Maxi Mu M r a T (Note 1) V Supply Voltage ..................................... 0.3V to 70V Operating Junction Temperature Range (Notes 2, 3, 4) IN SW Voltage (DC) ........................... 0.3V to (V + 0.3V) LTC3630E, LTC3630I ......................... 40C to 125C IN RUN Voltage................................................. 0.3V to 6V LTC3630H .......................................... 40C to 150C SS, FBO, I Voltages ................................. 0.3V to 6V LTC3630MP ....................................... 55C to 150C SET V , V , V Voltages ......................... 0.3V to 6V Storage Temperature Range .................. 65C to 150C FB PRG1 PRG2 Lead Temperature (Soldering, 10 sec) MSOP ...............................................................300C p in 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 Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3630EMSE PBF LTC3630EMSE TRPBF 3630 16-Lead Plastic MSOP 40C to 125C LTC3630IMSE PBF LTC3630IMSE TRPBF 3630 16-Lead Plastic MSOP 40C to 125C LTC3630HMSE PBF LTC3630HMSE TRPBF 3630 16-Lead Plastic MSOP 40C to 150C LTC3630MPMSE PBF LTC3630MPMSE TRPBF 3630 16-Lead Plastic MSOP 55C to 150C LTC3630EDHC PBF LTC3630EDHC TRPBF 3630 16-Lead (5mm 3mm) Plastic DFN 40C to 125C LTC3630IDHC PBF LTC3630IDHC TRPBF 3630 40C to 125C 16-Lead (5mm 3mm) Plastic DFN LTC3630HDHC PBF LTC3630HDHC TRPBF 3630 16-Lead (5mm 3mm) Plastic DFN 40C to 150C LTC3630MPDHC PBF LTC3630MPDHC TRPBF 3630 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 non-standard lead based finish parts. For more information on lead free part marking, go to: