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LTC3632 - High Efficiency, High Voltage 20mA Synchronous Step-Down Converter

The LTC3632 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 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 its wide 4.5V to 50V input range and internal overvoltage monitor capable of protecting the part through 60V surges, the LTC3632 is a robust converter suited for regulating a wide variety of power sources. Additionally, the LTC3632 includes a precise run threshold and soft‑start feature to guarantee that the power system start-up is well-controlled in any environment.

The LTC3632 is available in the thermally enhanced 3mm × 3mm DFN and MS8E packages.

Features Wide Input Voltage Range: Operation from 4.5V to 50V Overvoltage Lockout Provides Protection Up to 60V Internal High Side and Low Side Power Switches No Compensation Required 20mA Output Current Low Dropout Operation: 100% Duty Cycle Low Quiescent Current: 12μA Wide Output Voltage Range: 0.8V to VIN 0.8V ±1% Feedback Voltage Reference Adjustable Peak Current Limit Internal and External Soft-Start Precise RUN Pin Threshold with Adjustable Hysteresis Few External Components Required Low Profile (0.75mm) 3mm × 3mm DFN and Thermally Enhanced MS8E Packages Typical Application

Applications 4mA to 20mA Current Loops Industrial Control Supplies Distributed Power Systems Portable Instruments Battery-Operated Devices Automotive Power Systems Packaging

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