LTC2953

RECOMMENDED FOR NEW DESIGNS

Push Button On/Off Controller with Voltage Monitoring

Part Models: 8
1ku List Price: Starting From $2.78

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Overview

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

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

Part Models: 8
1ku List Price: Starting From $2.78

Documentation

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. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC2953CDD-1#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2953CDD-1#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2953CDD-2#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2953CDD-2#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2953IDD-1#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2953IDD-1#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2953IDD-2#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2953IDD-2#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Oscillators 1
LTC6991	PRODUCTION	TimerBlox: Resettable, Low Frequency Oscillator

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC2953-1
LTC2953-2

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.