LTC2951-1/LTC2951-2 - Push Button On/Off Controller
Features
- Adjustable Pushbutton Debounce and Delay Timers
- Low Supply Current: 6μA
- Wide Operating Voltage Range: 2.7V to 26.4V
- EN Output (LTC2951-1) Allows DC/DC Converter Control
- EN Output (LTC2951-2) 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
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC2951 is a micropower, wide input voltage range pushbutton ON/OFF controller. The part contains a pushbutton input which controls the toggling of an open-drain enable output. The pushbutton turn OFF debounce time is externally programmable, while the turn ON debounce time is fixed at 128ms. A simple microprocessor interface allows for proper system housekeeping prior to powerdown. Under system fault conditions, an adjustable KILL timeout delay ensures proper power-down.
The LTC2951 operates over a 2.7V to 26.4V input voltage range to accommodate a variety of input power supplies. Very low quiescent current (6μA typical) makes the LTC2951 ideally suited for battery powered applications. Two versions of the part are available to accommodate either positive or negative enable polarities. The parts are available in 8-pin 3mm × 2mm DFN and ThinSOT packages.
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 |
|---|---|---|---|---|---|
| LTC2951CDDB-1#PBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2951CDDB-1#TRMPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2951CDDB-1#TRPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2951CDDB-2#PBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2951CDDB-2#TRMPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2951CDDB-2#TRPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2951CTS8-1#PBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2951CTS8-1#TRMPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2951CTS8-1#TRPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2951CTS8-2#PBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2951CTS8-2#TRMPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2951CTS8-2#TRPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2951IDDB-1#PBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2951IDDB-1#TRMPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2951IDDB-1#TRPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2951IDDB-2#PBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2951IDDB-2#TRMPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2951IDDB-2#TRPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2951ITS8-1#PBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2951ITS8-1#TRMPBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2951ITS8-1#TRPBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2951ITS8-2#PBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2951ITS8-2#TRMPBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2951ITS8-2#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 |
|---|---|---|---|
| DC826B-B | LTC2951CTS8-2 | On/Off Controller, Vin (26.4V Max) = 2.7V - 26.4V | $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 | |
|---|---|---|---|---|---|---|
| LTC2951IDDB-1#PBF | 3x2 DFN-8 | I | $3.04 | Yes | ||
| LTC2951IDDB-1#TRMPBF | 3x2 DFN-8 | I | $3.04 | $2.21 | Yes | |
| LTC2951IDDB-1#TRPBF | 3x2 DFN-8 | I | $3.04 | $2.16 | Yes | |
| LTC2951IDDB-2#PBF | 3x2 DFN-8 | I | $3.04 | Yes | ||
| LTC2951IDDB-2#TRMPBF | 3x2 DFN-8 | I | $3.04 | $2.21 | Yes | |
| LTC2951IDDB-2#TRPBF | 3x2 DFN-8 | I | $3.04 | $2.16 | Yes | |
| LTC2951ITS8-1#PBF | SOT-23 | I | $3.04 | Yes | ||
| LTC2951ITS8-1#TRMPBF | SOT-23 | I | $3.04 | $2.21 | Yes | |
| LTC2951ITS8-1#TRPBF | SOT-23 | I | $3.04 | $2.16 | Yes | |
| LTC2951ITS8-2#PBF | SOT-23 | I | $3.04 | Yes | ||
| LTC2951ITS8-2#TRMPBF | SOT-23 | I | $3.04 | $2.21 | Yes | |
| LTC2951ITS8-2#TRPBF | SOT-23 | I | $3.04 | $2.16 | Yes | |
| Buy Now • Request Samples | ||||||
Applications
- Portable Instrumentation Meters
- Blade Servers
- Portable Customer Service PDA
- Desktop and Notebook Computers
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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.
