The LTC2952CF#PBF is a Power Management Device that 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.
- Pushbutton ON/OFF control
- Automatic low loss switchover between DC sources
- Monitored voltage over-temperature
- Adjustable pushbutton ON/OFF timers
- Simple interface allows graceful μP shutdown
- Extendable housekeeping wait time prior to shutdown
- 25μA Low shutdown current
- ±1.5% Guaranteed threshold accuracy
- 1.6s Watchdog timeout
- ±8kV HBM ESD on PB\ input
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