High Efficiency, 76V 500mA Synchronous Step-Down Converter

The LTC3630A 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 LTC3630A 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 LTC3630A’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 76V, the LTC3630A is a robust converter suited for regulating a wide variety of power sources. A feedback comparator output enables multiple LTC3630As to be paralleled in higher current applications.

The LTC3630A is available in the thermally-enhanced 3mm × 5mm DFN and the MSE16 packages.

Vin Range

LTC3630

4.5V to 65V

LTC3630A

4.5V to 76V

Applications

* Industrial Control Supplies

* Medical Devices

* Portable Instruments

* Automotive

* Avionics

* Wide Operating Input Voltage Range: 4V to 76V

* 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