LTC7138EMSE#PBF

LINEAR TECHNOLOGY  LTC7138EMSE#PBF  直流-直流开关降压稳压器, 可调, 4V-140V输入, 800mV-140V/400mA输出, 20 kHz, MSOP-16

The is a high-efficiency step-down DC-to-DC Regulator with internal power switch that draws only 12µA typical DC supply current while maintaining a regulated output voltage at no load. The LTC7138 can supply up to 400mA 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 LTC7138"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 LTC7138 is a robust regulator suited for regulating from a wide variety of power sources. Additionally, the LTC7138 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment.

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Internal low resistance power MOSFET

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No compensation required

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Low dropout operation - 100% duty cycle

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Precise RUN pin threshold

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Internal or external soft-start

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Few external components required

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Programmable input overvoltage lockout

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Programmable 1.8, 3.3, 5V or adjustable output

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12µA Low quiescent current

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0.8V ±1% Feedback voltage reference