LTC3632

LTC3632 High Efficiency, High Voltage 20mA Synchronous Step-Down Converter FEATURES n Wide Input Voltage Range: Operation from 4.5V to 50V n Overvoltage Lockout Provides Protection Up to 60V n Internal High Side and Low Side Power Switches n No Compensation Required n 20mA Output Current n Low Dropout Operation: 100% Duty Cycle n Low Quiescent Current: 12µA n Wide Output Voltage Range: 0.8V to VIN n 0.8V ±1% Feedback Voltage Reference n Adjustable Peak Current Limit n Internal and External Soft-Start n Precise RUN Pin Threshold with Adjustable Hysteresis n Few External Components Required n Low Profile (0.75mm) 3mm × 3mm DFN and Thermally Enhanced MS8E Packages APPLICATIONS n 4mA to 20mA Current Loops n Industrial Control Supplies n Distributed Power Systems n Portable Instruments n Battery-Operated Devices n Automotive Power Systems DESCRIPTION The LTC®3632 is a high efficiency, high voltage step-down DC/DC converter with internal high side and synchronous power switches that draws only 12μA typical DC supply current at no load while maintaining output voltage regulation. The LTC3632 can supply up to 20mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency in lower current applications. The LTC3632’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 it...