Overview

Features and Benefits

  • Wide Operating Voltage Range: 2.7V to 27V
  • Push Button Control of System Power
  • Low Supply Current: 14µA
  • Power Fail Comparator Generates Warning
  • UVLO Comparator Gracefully Latches Power Off
  • Adjustable Supply Monitor with 200ms Reset
  • Adjustable Power Down Timer
  • Low Leakage EN Output (LTC2953-1) Allows DC/DC Converter Control
  • High Voltage EN Output (LTC2953-2) Allows Circuit Breaker Control
  • Simple Interface Allows Orderly System Power Up and Power Down
  • ±1.5% Threshold Tolerances
  • ±10kV ESD HBM on PB Input
  • 12-Pin 3mm x 3mm DFN

Product Details

The LTC2953 is a push button On/Off controller that manages system power via a push button interface. An enable output toggles system power while an interrupt output provides debounced push button status. The interrupt output can be used in menu driven applications to request a system power down.

The LTC2953 also features input and output power supply monitors. An uncommitted power fail comparator provides real time input monitor information, while a de-glitched under voltage lockout comparator gracefully initiates a system power down. The under voltage lockout comparator prevents the system from powering from a low power supply.

The adjustable supply monitor input is compared against an accurate internal 0.5V reference. The reset output remains low until the supply monitor input has been in compliance for 200ms.

The LTC2953 operates over a wide 2.7V to 27V input voltage range and draws only 14µA of current. Two versions of the part accommodate either positive or negative enable polarities.

Applications

  • Push Button Power Path Control
  • Battery Power Supervisor
  • Portable Instrumentation, PDA
  • Blade Servers
  • Desktop and Notebook Computers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations

LTspice

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.

LTspice

Models for the following parts are available in LTspice:

LTC2953-1
LTC2953-2

Product Recommendations

LTC2953 Companion Parts

Recommended Suggested Oscillator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

LTC2953 Discussions

Re: LTC2953-1
12 week(s) ago in Power By Linear
LTC2953-1
12 week(s) ago in Power By Linear
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.