DESCRIPTION

· The LTC2954 is a pushbutton on/off controller that manages system power via a pushbutton interface.
· It features an enable output to toggle system power and an interrupt output for debounced pushbutton 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 ensure dependable pushbutton control and resistance to accidental toggling of system power.
· The LTC2954 operates over a wide 2.7V to 26.4V input voltage range, making it suitable for various input power supplies.
· With a very low quiescent current (6μA typical), it is ideal for battery-powered applications.
· Two versions are available to accommodate either positive or negative enable polarities.

FEATURES

· Pushbutton PowerPath™ Control
· Adjustable Power On/Off Timers
· Low Supply Current: 6μA
· Wide Operating Voltage Range: 2.7V to 26.4V
· Low Leakage EN Output (LTC2954-1) for DC/DC Converter Control
· High Voltage EN Output (LTC2954-2) for Circuit Breaker Control
· Simple Interface for Graceful μP Shutdown
· High Input Voltage PB Pin with Internal Pull-Up Resistor
· ±10kV ESD HBM on PB Input
· Accurate 0.6V Threshold on KILL Comparator Input
· Available in 8-Pin 3mm × 2mm DFN and ThinSOT™ Packages.

APPLICATIONS

· Portable Instrumentation Meters
· Blade Servers
· Portable Customer Service PDA
· Desktop and Notebook Computers.