LTC2952IUF#PBF

LINEAR TECHNOLOGY  LTC2952IUF#PBF  电源监控器, 低电平有效, 漏极开路复位, 2监视器, 2.7V-28V输入, QFN-20

The is a Power Management Device features three main functions of pushbutton on/off control of system power, ideal diode PowerPath™ controller and system monitoring. The LTC2952"s pushbutton input, which provides on/off control of system power, has independently adjustable ON and OFF debounce times. A simple microprocessor interface involving an interrupt signal allows for proper system housekeeping prior to power-down. The ideal diode PowerPath controllers provide automatic low loss switchover between two DC sources by regulating two external P-channel MOSFETs to have a small 20mV forward drop. High reliability systems may utilize the LTC2952"s monitoring features to ensure system integrity. These features includes power-fail, voltage monitoring and µP watchdog. The LTC2952 operates over a wide operating voltage range to accommodate a large variety of input power supplies.

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Pushbutton ON/OFF control

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Automatic low loss switchover between DC sources

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Monitored voltage over-temperature

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Adjustable pushbutton ON/OFF timers

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Simple interface allows graceful µP shutdown

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Extendable housekeeping wait time prior to shutdown

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25µA Low shutdown current

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±1.5% Guaranteed threshold accuracy

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1.6s Watchdog timeout

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±8kV HBM ESD on PB\ input