LTC3638EMSE#PBF
数据手册.pdfLINEAR TECHNOLOGY LTC3638EMSE#PBF 芯片, 直流/直流转换器, 降压, 0.25A, MSOP-16
The 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.
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- Internal low resistance power MOSFET
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- No compensation required
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- Adjustable 20 to 250mA maximum output current
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- Low dropout operation 100% duty cycle
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- Low quiescent current 12µA
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- Wide output range 0.8V to VIN
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- 0.8V ±1% Feedback voltage reference
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- Precise RUN pin threshold
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- Internal or external soft-start
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- Programmable 1.8, 3.3, 5V or adjustable output
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- Few external components required
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- Programmable input overvoltage lockout