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IC PB ON/OFF CONTROLLER TSOT23-8
■ Adjustable Power On/Off Timers
■ Low Supply Current: 6µA
■ Wide Operating Voltage Range: 2.7V to 26.4V
■ Low Leakage EN Output (LTC2954-1) Allows DC/DC
■ High Voltage E
N Output (LTC2954-2) Allows Circuit
■ Simple Interface Allows Graceful µP Shut Down
■ High Input Voltage P
B Pin with Internal Pull Up
■ ±10kV ESD HBM on PB Input
■ Accurate 0.6V Threshold on KILL Comparator Input
■ 8-Pin 3mm × 2mm DFN and ThinSOTTM Packages
■ Push Button Power Path Control
■ Portable Instrumentation Meters
■ Blade Servers
■ Portable Customer Service PDA
■ Desktop and Notebook Computers
The LTC®2954 is a push button On/Off controller that manages system power via a push button interface. An enable output toggles system power while an interruptoutput provides debounced push button status. The interrupt output can be used in menu driven applications to request a system power down. A power kill input allows a microprocessor or system to reset the enable output, effectively powering down the system. Independently adjustable On and Off timers allow dependable push button control of the enable output and resistance to accidental toggling of system power.
The LTC2954 operates over a wide 2.7V to 26.4V input voltage range to accommodate a wide variety of input power supplies. Very low quiescent current (6µA typical) makes the LTC2954 ideally suited for battery powered applications. Two versions of the part are available to accommodate either positive or negative enable polarities.
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