The LTC3638EMSE#PBF is a 140V 250mA step-down DC/DC Regulator with an internal high side power switch that draws only 12μA 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 4 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.
- Internal low resistance power MOSFET
- No compensation required
- Adjustable 20 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 1.8, 3.3, 5V or adjustable output
- Few external components required
- Programmable input overvoltage lockout
工业, 医用, 电源管理, 便携式器材, 车用, 航空电子
(EN)
