LTC2950-1 Datasheet | Linear Technology

LTC2950-1/LTC2950-2 Push Button On/Off Controller Features Adjustable Push Button On/Off Timers - Low Supply Current: 6μA - Wide Operating Voltage Range: 2.7V to 26V - EN Output (LTC2950-1) Allows DC/DC Converter Control - 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 - ±10k V ESD HBM on PB Input - Accurate 0.6V Threshold on KILL parator Input - 8-Pin 3mm × 2mm DFN and Thin SOTTM Packages - DESCRIPTION The LTC®2950 is a micropower, wide input voltage range, push button ON/OFF controller. The part contains a push button 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 operates over a wide 2.7V to 26V input voltage range to acmodate a wide variety of input power supplies. Very low quiescent current (6μA typical) makes the LTC2950 ideally suited for battery powered applications. Two versions of the part are available to acmodate either positive or negative enable polarities. The parts are available in either 8-lead 3mm × 2mm DFN or Thin SOT packages. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. APPLICATIONS - - - - Portable Instrumentation Meters Blade Servers Portable Customer Service PDA Desktop and Notebook puters TYPICAL APPLICATION VIN 3V - 26V Turn On Debounce VIN VOUT DC/DC BUCK SHDN EN R1 10k INT μP/μC KILL 2950 TA01 VIN LTC2950-1 PB GND ONT CONT- 0.033μF EN INT KILL OFFT COFFT- 0.033μF 2V/DIV PB 10ms/DIV - OPTIONAL 2950...