The LTC2952 is a power management device that features three main functions: pushbutton on/off control of system power, ideal diode PowerPath™ controllers 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 include: 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. The part’s combination of low 20mV external MOSFET regulation and very low standby current matches battery powered and power conscious application requirements. Applications * Desktop and Notebook Computers * Portable Instrumentations * Cell Phones, PDA and Handheld Computers * Servers and Computer Peripherals * Battery Backup Systems * Pushbutton On/Off Control * Automatic Low Loss Switchover Between DC Sources * Wide Operating Voltage Range: 2.7V to 28V * Low 25μA Shutdown Current * Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature * Adjustable Pushbutton On/Off Timers * Simple Interface Allows Graceful μP Shutdown * Extendable Housekeeping Wait Time Prior to Shutdown * 200ms Reset Delay and 1.6s Watchdog Timeout * ±8kV HBM ESD on PB Input * 20-pin TSSOP and QFN (4mm × 4mm) Packages https://elecena.pl/product/256492/pushbutton-powerpath-controller-with-supervisor 2007-03-03 https://elecena.pl/product/256492/pushbutton-powerpath-controller-with-supervisor 2014-06-11 https://elecena.pl/product/256492/pushbutton-powerpath-controller-with-supervisor 2025-01-20