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LTC3630 - High Efficiency, 65V 500mA Synchronous Step-Down Converter

The LTC®3630 is a high efficiency step-down DC/DC converter 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 LTC3630 can supply up to 500mA 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 LTC3630’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 of 4V to 65V, the LTC3630 is a robust converter suited for regulating a wide variety of power sources. Additionally, the LTC3630 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment. A feedback comparator output enables multiple LTC3630s to be paralleled in higher current applications.

The LTC3630 is available in the thermally-enhanced 3mm × 5mm DFN and the MSE16 packages.

Features Wide Operating Input Voltage Range: 4V to 65V Synchronous Operation for Highest Efficiency Internal High Side and Low Side Power MOSFETs No Compensation Required Adjustable 50mA to 500mA Maximum Output Current Low Dropout Operation: 100% Duty Cycle Low Quiescent Current: 12μA Wide Output Range: 0.8V to VIN 0.8V ±1% Feedback Voltage Reference Precise RUN Pin Threshold Internal and External Soft-Start Programmable 1.8V, 3.3V, 5V or Adjustable Output Few External Components Required Low Profile (0.75mm) 3mm × 5mm DFN and Thermally-Enhanced MSE16 Packages Typical Application

Applications Industrial Control Supplies Medical Devices Distributed Power Systems Portable Instruments Battery-Operated Devices Automotive Avionics Packaging

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