LTC2955 - Pushbutton On/Off Controller with Automatic Turn-On

Features

  • Automatic Turn-On Via Voltage Monitor Input
  • Wide Input Supply Range: 1.5V to 36V
  • Low Supply Current: 1.2μA
  • ±25kV ESD HBM on PB Input
  • ±36V Wide Input Voltage for PB Input
  • Low Leakage EN Output Allows DC/DC Converter Control (LTC2955-1)
  • High Voltage EN Output Drives External P-Channel MOSFET (LTC2955-2)
  • Simple Interface Allows Graceful μP Shutdown
  • Adjustable Turn-Off Timer
  • 10-Lead 3mm × 2mm DFN and 8-Lead ThinSOT™ Packages

Typical Application

LTC2955 Typical Application
LTC2955 Typical Application

Description

The LTC®2955 is a micropower, pushbutton on/off controller that manages system power by generating a clean enable output from the supply monitor input and the debounced pushbutton input. It features an interrupt output that notifies the system of a pushbutton or low supply event. When the system is ready, it may use the power kill input to shut off power. If the pushbutton remains pressed for more than the configurable turn-off duration, the system power is forced off.

The supply input covers a wide range from 1.5V to 36V. The robust pushbutton input handles wide voltage swings of ±36V and ESD strikes to ±25kV (human body model) without latchup or damage. A low 1.2μA supply current maximizes battery run time. Separate versions are available for 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
LTC2955CDDB-1#PBF 3x2 DFN-10 DDB C 05-08-1722 Yes
LTC2955CDDB-1#TRMPBF 3x2 DFN-10 DDB C 05-08-1722 Yes
LTC2955CDDB-1#TRPBF 3x2 DFN-10 DDB C 05-08-1722 Yes
LTC2955CDDB-2#PBF 3x2 DFN-10 DDB C 05-08-1722 Yes
LTC2955CDDB-2#TRMPBF 3x2 DFN-10 DDB C 05-08-1722 Yes
LTC2955CDDB-2#TRPBF 3x2 DFN-10 DDB C 05-08-1722 Yes
LTC2955CTS8-1#PBF SOT-23 TS8 C 05-08-1637 Yes
LTC2955CTS8-1#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2955CTS8-1#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2955CTS8-2#PBF SOT-23 TS8 C 05-08-1637 Yes
LTC2955CTS8-2#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2955CTS8-2#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2955IDDB-1#PBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LTC2955IDDB-1#TRMPBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LTC2955IDDB-1#TRPBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LTC2955IDDB-2#PBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LTC2955IDDB-2#TRMPBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LTC2955IDDB-2#TRPBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LTC2955ITS8-1#PBF SOT-23 TS8 I 05-08-1637 Yes
LTC2955ITS8-1#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2955ITS8-1#TRPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2955ITS8-2#PBF SOT-23 TS8 I 05-08-1637 Yes
LTC2955ITS8-2#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2955ITS8-2#TRPBF SOT-23 TS8 I 05-08-1637 Yes


LTC2955 Package Drawing
LTC2955 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
LTC2955CDDB-1#PBF 3x2 DFN-10 C $2.88 Yes
LTC2955CDDB-1#TRMPBF 3x2 DFN-10 C $2.88 $2.03 Yes
LTC2955CDDB-1#TRPBF 3x2 DFN-10 C $2.83 $1.98 Yes
LTC2955CDDB-2#PBF 3x2 DFN-10 C $2.88 Yes
LTC2955CDDB-2#TRMPBF 3x2 DFN-10 C $2.88 $2.03 Yes
LTC2955CDDB-2#TRPBF 3x2 DFN-10 C $2.83 $1.98 Yes
LTC2955CTS8-1#PBF SOT-23 C $2.88 Yes
LTC2955CTS8-1#TRMPBF SOT-23 C $2.88 $2.03 Yes
LTC2955CTS8-1#TRPBF SOT-23 C $2.83 $1.98 Yes
LTC2955CTS8-2#PBF SOT-23 C $2.88 Yes
LTC2955CTS8-2#TRMPBF SOT-23 C $2.88 $2.03 Yes
LTC2955CTS8-2#TRPBF SOT-23 C $2.83 $1.98 Yes
LTC2955IDDB-1#PBF 3x2 DFN-10 I $3.44 Yes
LTC2955IDDB-1#TRMPBF 3x2 DFN-10 I $3.44 $2.43 Yes
LTC2955IDDB-1#TRPBF 3x2 DFN-10 I $3.39 $2.38 Yes
LTC2955IDDB-2#PBF 3x2 DFN-10 I $3.44 Yes
LTC2955IDDB-2#TRMPBF 3x2 DFN-10 I $3.44 $2.43 Yes
LTC2955IDDB-2#TRPBF 3x2 DFN-10 I $3.39 $2.38 Yes
LTC2955ITS8-1#PBF SOT-23 I $3.44 Yes
LTC2955ITS8-1#TRMPBF SOT-23 I $3.44 $2.43 Yes
LTC2955ITS8-1#TRPBF SOT-23 I $3.39 $2.38 Yes
LTC2955ITS8-2#PBF SOT-23 I $3.44 Yes
LTC2955ITS8-2#TRMPBF SOT-23 I $3.44 $2.43 Yes
LTC2955ITS8-2#TRPBF SOT-23 I $3.39 $2.38 Yes
Buy NowRequest Samples
* 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
DC1836A-A LTC2955IDDB-1 PB On/Off Controller with Automatic Turn On (EN output) $25.00
DC1836A-B LTC2955IDDB-2 PB On/Off Controller with Automatic Turn On (/EN output) $25.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Desktop and Notebook Computers
  • GPS Devices
  • Portable Instruments
  • Automotive Electronics

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

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

To launch a ready to run LTspice demonstration circuit for this part:

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:
LTC2955-1
LTC2955-2

Technical Support