LTC2950-2 Datasheet

• Adjustable Pushbutton On/Off Timers
• Low Supply Current: 6μA
• Wide Operating Voltage Range: 2.7V to 26.4V
• EN Output (LTC2950-2) Allows Circuit Breaker Control
• Simple Interface Allows Graceful μP Shut Down
• High Input Voltage PB Pin with Internal Pull Up Resistor
• ±10kV ESD HBM on PB Input
• Accurate 0.6V Threshold on KILL Comparator Input
• 8-Pin 3mm × 2mm DFN and ThinSOT^™ Packages

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

The LTC2950-2 is a micropower, wide input voltage range, pushbutton ON/OFF controller. The part contains a pushbutton input with independently programmable ON and OFF debounce times that control the toggling of an open drain enable output. The part also contains a simple microprocessor interface to allow for proper system housekeeping prior to power down. Under system fault conditions, an internal KILL timer ensures proper power down.

The LTC2950-2 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 LTC2950-2 ideally suited for battery powered applications. Two versions of the part are available to accommodate either positive or negative enable polarities. The parts are available in either 8-lead 3mm × 2mm DFN or ThinSOT packages.