LTC2951-2 Datasheet | Linear Technology

LTC2951-1/LTC2951-2 Push Button On/Off Controller Features Adjustable Push Button Debounce and Delay Timers - Low Supply Current: 6µA - Wide Operating Voltage Range: 2.7V to 26V - EN Output (LTC2951-1) Allows DC/DC Converter Control - ⎯E⎯N Output (LTC2951-2) Allows Circuit Breaker .. Control - Simple Interface Allows Graceful µP Shut Down - High Input Voltage ⎯P⎯B Pin with Internal Pull Up Resistor - ±10k V ESD HBM on ⎯P⎯B Input - Accurate 0.6V Threshold on ⎯K⎯I⎯L⎯L parator Input - 8-Pin 3mm × 2mm DFN and Thin SOTTM Packages - DESCRIPTIO The LTC®2951 is a micropower, wide input voltage range push button ON/OFF controller. The part contains a push button input which controls the toggling of an open drain enable output. The push button turn OFF debounce time is externally programmable, while the turn ON debounce time is fixed at 128ms. A simple microprocessor interface allows for proper system housekeeping prior to power down. Under system fault conditions, an adjustable ⎯K⎯I⎯L⎯L timeout delay ensures proper power down. The LTC2951 operates over a 2.7V to 26V input voltage range to acmodate a variety of input power supplies. Very low quiescent current (6µA typical) makes the LTC2951 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 8-pin 3mm × 2mm DFN and Thin SOT packages. , 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. U APPLICATIO S - - - - Portable Instrumentation Meters Blade Servers Portable Customer Service PDA Desktop and Notebook puters TYPICAL APPLICATIO VIN 3V - 26V VOUT DC/DC BUCK SHDN EN VIN LTC2951-1 PB GND KILLT CKILLT- 0.033µF EN INT KILL OFFT 2951 TA01 R1 10k INT KILL µP/µC 2V/DIV 128ms COFFT- 0.033µF - OPTIONAL Turn On...