The LTC3638 is a high efficiency step-down DC/DC regulator with internal power switch that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load. The LTC3638 can supply up to 250mA 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 LTC3638’s combination of Burst Mode® operation, integrated power switch, 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 140V and programmable overvoltage lockout, the LTC3638 is a robust regulator suited for regulating from a wide variety of power sources. Additionally, the LTC3638 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 LTC3638s to be connected in parallel for higher current applications. The LTC3638 is available in a thermally enhanced high voltage-capable 16-lead MSE package with four missing pins. Applications * Industrial Control Supplies * Medical Devices * Distributed Power Systems * Portable Instruments * Battery-Operated Devices * Avionics * Automotive * Wide Operating Input Voltage Range: 4V to 140V * Internal Low Resistance Power MOSFET * No Compensation Required * Adjustable 20mA to 250mA 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 or External Soft-Start * Programmable 1.8V, 3.3V, 5V or Adjustable Output * Few External Components Required * Programmable Input Overvoltage Lockout * Thermally Enhanced High Voltage MSOP Package https://elecena.pl/product/4567695/high-efficiency-140v-250ma-step-down-regulator 2014-01-16 https://elecena.pl/product/4567695/high-efficiency-140v-250ma-step-down-regulator 2025-01-22