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
AEC-Q100 data available for specific packages
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 |
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
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 | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| 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 | |
| Buy Now • Request Samples | ||||||
Applications
- Desktop and Notebook Computers
- GPS Devices
- Portable Instruments
- Automotive Electronics
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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LTC2955-1
LTC2955-2
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
