LTC2951-1
LTC2951-2
Info : RECOMMENDED FOR NEW DESIGNS
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LTC2951-1
LTC2951-2

Push Button On/Off Controller

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 16
1ku List Price Starting From $2.19
Features
  • Adjustable Pushbutton Debounce and Delay Timers
  • Low Supply Current: 6μA
  • Wide Operating Voltage Range: 2.7V to 26.4V
  • EN Output (LTC2951-1) Allows DC/DC Converter Control
  • EN Output (LTC2951-2) Allows Circuit Breaker Control
  • Simple Interface Allows 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
  • 8-Pin 3mm × 2mm DFN and ThinSOT Packages
Additional Details
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The LTC2951 is a micropower, wide input voltage range pushbutton ON/OFF controller. The part contains a pushbutton input which controls the toggling of an open-drain enable output. The pushbutton 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 powerdown. Under system fault conditions, an adjustable KILL timeout delay ensures proper power-down.

The LTC2951 operates over a 2.7V to 26.4V 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.

Applications

  • Portable Instrumentation Meters
  • Blade Servers
  • Portable Customer Service PDA
  • Desktop and Notebook Computers
Part Models 16
1ku List Price Starting From $2.19

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC2951CDDB-1#TRMPBF
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LTC2951CDDB-1#TRPBF
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LTC2951CDDB-2#TRMPBF
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LTC2951CDDB-2#TRPBF
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LTC2951CTS8-1#TRMPBF
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LTC2951CTS8-1#TRPBF
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LTC2951CTS8-2#TRMPBF
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LTC2951CTS8-2#TRPBF
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LTC2951IDDB-1#TRMPBF
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LTC2951IDDB-1#TRPBF
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LTC2951IDDB-2#TRMPBF
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LTC2951IDDB-2#TRPBF
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LTC2951ITS8-1#TRMPBF
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LTC2951ITS8-1#TRPBF
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LTC2951ITS8-2#TRMPBF
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LTC2951ITS8-2#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC826C

LTC2950-2/LTC2951-2 Pushbutton On/Off Controller 2.7V ≤ VIN ≤ 26.4V

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DC826C

LTC2950-2/LTC2951-2 Pushbutton On/Off Controller 2.7V ≤ VIN ≤ 26.4V

LTC2950-2/LTC2951-2 Pushbutton On/Off Controller 2.7V ≤ VIN ≤ 26.4V

Product Detail

Demonstration Circuits 826C-A and 826C-B feature the LTC2950-2 and the LTC2951-2 respectively, which are low power, wide input voltage range, Push Button On/Off Controllers. A push button switch shorts the /PB pin to ground which in turn sets the /EN pin low. Shorting /PB to ground a second time subsequently resets the /EN pin high. The /EN pin is used to connect to a DC/DC converter shutdown to control the turn on and off of the circuit, simulated with a green LED on the DC826C-A/DC826C-B.


 


Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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