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LTC2905 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2905 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC2951 1 2951f EN 2V/DIV PB 25ms/DIV 2951 TA01b 128ms Push Button On/Off Controller 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 accommodate 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 accommodate either positive or negative enable polarities. The parts are available in 8-pin 3mm × 2mm DFN and ThinSOT packages. ■ Portable Instrumentation Meters ■ Blade Servers ■ Portable Customer Service PDA ■ Desktop and Notebook Computers ■ 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 ■ ±10kV ESD HBM on ⎯P⎯B Input ■ Accurate 0.6V Threshold on ⎯K⎯I⎯L⎯L Comparator Input ■ 8-Pin 3mm × 2mm DFN and ThinSOT TM Packages VIN SHDN VIN VOUT EN INT KILL INT KILL LTC2951-1 KILLT OFFT DC/DC BUCK µP/µC 3V – 26V *OPTIONAL R1 10k 2951 TA01 CKILLT* 0.033 µF COFFT* 0.033 µF PB GND VIN , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. APPLICATIO S FEATURES DESCRIPTIO TYPICAL APPLICATIO Turn On Debounce |
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