LTC3639

LTC3639 High Efficiency, 150V 100mA Synchronous Step-Down Regulator FEATURES n Wide Operating Input Voltage Range: 4V to 150V n Synchronous Operation for Highest Efficiency n Internal High Side and Low Side Power MOSFETs n No Compensation Required n Adjustable 10mA to 100mA Maximum Output Current n Low Dropout Operation: 100% Duty Cycle n Low Quiescent Current: 12µA n Wide Output Range: 0.8V to VIN n 0.8V ±1% Feedback Voltage Reference n Precise RUN Pin Threshold n Internal or External Soft-Start n Programmable 1.8V, 3.3V, 5V or Adjustable Output n Few External Components Required n Programmable Input Overvoltage Lockout n Thermally Enhanced High Voltage MSOP Package APPLICATIONS n Industrial Control Supplies n Medical Devices n Distributed Power Systems n Portable Instruments n Battery-Operated Devices n Automotive n Avionics DESCRIPTION The LTC®3639 is a high efficiency step-down DC/DC regulator with internal high side and synchronous power switches that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load. The LTC3639 can supply up to 100mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency and for reducing output ripple and component size. The LTC3639’s combination of Burst Mode® operation, integrated power switches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents. With its wide input range ...