DocumentationDatasheet
Design Note
Reliability Data
Product Selector Card
LT Journal
Press Release
cad_symbol
Features
- Adjustable Pushbutton On/Off Timers
- Low Supply Current: 6μA
- Wide Operating Voltage Range: 2.7V to 26.4V
- EN Output (LTC2950-1) Allows DC/DC Converter Control
- EN Output (LTC2950-2) Allows Circuit Breaker Control
- Simple Interface Allows Graceful μP Shut Down
- 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
Description
The LTC2950 is a micropower, wide input voltage range, pushbutton ON/OFF controller. The part contains a pushbutton input with independently programmable ON and OFF debounce times that control the toggling of an open drain enable output. The part also contains a simple microprocessor interface to allow for proper system housekeeping prior to power down. Under system fault conditions, an internal KILL timer ensures proper power down.
The LTC2950 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 LTC2950 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 either 8-lead 3mm × 2mm DFN or ThinSOT packages.
3x2 DFN-8,SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC2950CDDB-1#PBF | DFN | 8 | C | $2.59 | |
| LTC2950CDDB-1#TRMPBF | DFN | 8 | C | $2.59 | $1.86 |
| LTC2950CDDB-1#TRPBF | DFN | 8 | C | $2.59 | $1.81 |
| LTC2950CDDB-2#PBF | DFN | 8 | C | $2.59 | |
| LTC2950CDDB-2#TRMPBF | DFN | 8 | C | $2.59 | $1.86 |
| LTC2950CDDB-2#TRPBF | DFN | 8 | C | $2.59 | $1.81 |
| LTC2950CTS8-1#PBF | SOT | 8 | C | $2.59 | |
| LTC2950CTS8-1#TRMPBF | SOT | 8 | C | $2.59 | $1.86 |
| LTC2950CTS8-1#TRPBF | SOT | 8 | C | $2.59 | $1.81 |
| LTC2950CTS8-2#PBF | SOT | 8 | C | $2.59 | |
| LTC2950CTS8-2#TRMPBF | SOT | 8 | C | $2.59 | $1.86 |
| LTC2950CTS8-2#TRPBF | SOT | 8 | C | $2.59 | $1.81 |
| LTC2950IDDB-1#PBF | DFN | 8 | I | $3.04 | |
| LTC2950IDDB-1#TRMPBF | DFN | 8 | I | $3.04 | $2.21 |
| LTC2950IDDB-1#TRPBF | DFN | 8 | I | $3.04 | $2.16 |
| LTC2950IDDB-2#PBF | DFN | 8 | I | $3.04 | |
| LTC2950IDDB-2#TRMPBF | DFN | 8 | I | $3.04 | $2.21 |
| LTC2950IDDB-2#TRPBF | DFN | 8 | I | $3.04 | $2.16 |
| LTC2950ITS8-1#PBF | SOT | 8 | I | $3.04 | |
| LTC2950ITS8-1#TRMPBF | SOT | 8 | I | $3.04 | $2.21 |
| LTC2950ITS8-1#TRPBF | SOT | 8 | I | $3.04 | $2.16 |
| LTC2950ITS8-2#PBF | SOT | 8 | I | $3.04 | |
| LTC2950ITS8-2#TRMPBF | SOT | 8 | I | $3.04 | $2.21 |
| LTC2950ITS8-2#TRPBF | SOT | 8 | I | $3.04 | $2.16 |
| LTC2950CDDB-1 | DFN | 8 | C | $5.18 | |
| LTC2950CDDB-1#TR | DFN | 8 | C | $5.18 | $3.62 |
| LTC2950CDDB-2 | DFN | 8 | C | $5.18 | |
| LTC2950CDDB-2#TR | DFN | 8 | C | $5.18 | $3.62 |
| LTC2950CTS8-1 | SOT | 8 | C | $5.18 | |
| LTC2950CTS8-1#TR | SOT | 8 | C | $5.18 | $3.62 |
| LTC2950CTS8-2 | SOT | 8 | C | $5.18 | |
| LTC2950CTS8-2#TR | SOT | 8 | C | $5.18 | $3.62 |
| LTC2950IDDB-1 | DFN | 8 | I | $6.08 | |
| LTC2950IDDB-1#TR | DFN | 8 | I | $6.08 | $4.32 |
| LTC2950IDDB-2 | DFN | 8 | I | $6.08 | |
| LTC2950IDDB-2#TR | DFN | 8 | I | $6.08 | $4.32 |
| LTC2950ITS8-1 | SOT | 8 | I | $6.08 | |
| LTC2950ITS8-1#TR | SOT | 8 | I | $6.08 | $4.32 |
| LTC2950ITS8-2 | SOT | 8 | I | $6.08 | |
| LTC2950ITS8-2#TR | SOT | 8 | I | $6.08 | $4.32 |
| LTC2950CDDB-1#TRM | DFN | 8 | C | $5.18 | $3.72 |
| LTC2950CDDB-2#TRM | DFN | 8 | C | $5.18 | $3.72 |
| LTC2950CTS8-1#TRM | SOT | 8 | C | $5.18 | $3.72 |
| LTC2950CTS8-2#TRM | SOT | 8 | C | $5.18 | $3.72 |
| LTC2950IDDB-1#TRM | DFN | 8 | I | $6.08 | $4.42 |
| LTC2950IDDB-2#TRM | DFN | 8 | I | $6.08 | $4.42 |
| LTC2950ITS8-1#TRM | SOT | 8 | I | $6.08 | $4.42 |
| LTC2950ITS8-2#TRM | SOT | 8 | I | $6.08 | $4.42 |
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 |
|---|---|---|---|
| DC826C-A | LTC2950CTS8-2 Demo Board | Pushbutton On/Off Controller, 2.7V ≤ VIN ≤ 26.4V | $25.00 |