LTC2954 - Push Button On/Off Controller with µP Interrupt

Features

  • Adjustable Power On/Off Timers
  • Low Supply Current: 6μA
  • Wide Operating Voltage Range: 2.7V to 26.4V
  • Low Leakage EN Output (LTC2954-1) Allows DC/DC Converter Control
  • High Voltage EN Output (LTC2954-2) 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

Typical Application

LTC2954 Typical Application
LTC2954 Typical Application

Description

The LTC2954 is a pushbutton on/off controller that manages system power via a pushbutton interface. An enable output toggles system power while an interrupt output provides debounced pushbutton status. The interrupt output can be used in menu driven applications to request a system power-down. A power kill input allows a microprocessor or system to reset the enable output, effectively powering down the system. Independently adjustable on and off timers allow dependable pushbutton control of the enable output and resistance to accidental toggling of system power.

The LTC2954 operates over a wide 2.7V to 26.4V input voltage range to accommodate a wide variety of input power supplies. Very low quiescent current (6μA typical) makes the LTC2954 ideally suited for battery powered applications. Two versions of the part are available to accommodate either positive or negative enable polarities.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC2954CDDB-1#PBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2954CDDB-1#TRMPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2954CDDB-1#TRPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2954CDDB-2#PBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2954CDDB-2#TRMPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2954CDDB-2#TRPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2954CTS8-1#PBF SOT-23 TS8 C 05-08-1637 Yes
LTC2954CTS8-1#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2954CTS8-1#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2954CTS8-2#PBF SOT-23 TS8 C 05-08-1637 Yes
LTC2954CTS8-2#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2954CTS8-2#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2954IDDB-1#PBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2954IDDB-1#TRMPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2954IDDB-1#TRPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2954IDDB-2#PBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2954IDDB-2#TRMPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2954IDDB-2#TRPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2954ITS8-1#PBF SOT-23 TS8 I 05-08-1637 Yes
LTC2954ITS8-1#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2954ITS8-1#TRPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2954ITS8-2#PBF SOT-23 TS8 I 05-08-1637 Yes
LTC2954ITS8-2#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2954ITS8-2#TRPBF SOT-23 TS8 I 05-08-1637 Yes


LTC2954 Package Drawing
LTC2954 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC2954CDDB-1#PBF 3x2 DFN-8 C $2.59 Yes
LTC2954CDDB-1#TRMPBF 3x2 DFN-8 C $2.59 $1.83 Yes
LTC2954CDDB-1#TRPBF 3x2 DFN-8 C $2.59 $1.81 Yes
LTC2954CDDB-2#PBF 3x2 DFN-8 C $2.59 Yes
LTC2954CDDB-2#TRMPBF 3x2 DFN-8 C $2.59 $1.83 Yes
LTC2954CDDB-2#TRPBF 3x2 DFN-8 C $2.59 $1.81 Yes
LTC2954CTS8-1#PBF SOT-23 C $2.59 Yes
LTC2954CTS8-1#TRMPBF SOT-23 C $2.59 $1.83 Yes
LTC2954CTS8-1#TRPBF SOT-23 C $2.59 $1.81 Yes
LTC2954CTS8-2#PBF SOT-23 C $2.59 Yes
LTC2954CTS8-2#TRMPBF SOT-23 C $2.59 $1.83 Yes
LTC2954CTS8-2#TRPBF SOT-23 C $2.59 $1.81 Yes
LTC2954IDDB-1#PBF 3x2 DFN-8 I $3.04 Yes
LTC2954IDDB-1#TRMPBF 3x2 DFN-8 I $3.04 $2.18 Yes
LTC2954IDDB-1#TRPBF 3x2 DFN-8 I $3.04 $2.16 Yes
LTC2954IDDB-2#PBF 3x2 DFN-8 I $3.04 Yes
LTC2954IDDB-2#TRMPBF 3x2 DFN-8 I $3.04 $2.18 Yes
LTC2954IDDB-2#TRPBF 3x2 DFN-8 I $3.04 $2.16 Yes
LTC2954ITS8-1#PBF SOT-23 I $3.04 Yes
LTC2954ITS8-1#TRMPBF SOT-23 I $3.04 $2.18 Yes
LTC2954ITS8-1#TRPBF SOT-23 I $3.04 $2.16 Yes
LTC2954ITS8-2#PBF SOT-23 I $3.04 Yes
LTC2954ITS8-2#TRMPBF SOT-23 I $3.04 $2.18 Yes
LTC2954ITS8-2#TRPBF SOT-23 I $3.04 $2.16 Yes
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1090A LTC2954 | Push Button On/Off Controller with uP Interrupt $25.00
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Click here to view our complete list of demo boards

Applications

  • Pushbutton PowerPath™ Control
  • Portable Instrumentation Meters
  • Blade Servers
  • Portable Customer Service PDA
  • Desktop and Notebook Computers

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC2954-1
LTC2954-2

Technical Support