The LTC2950 and LTC2951 are a pair of micro power controllers designed for debouncing and controlling the on/off pushbutton of portable devices. They integrate flexible timing circuits for debouncing the pushbutton input and provide a simple yet powerful interface for controlled power up and power down of the handheld device. These two high voltage (2.7V to 26V) parts are offered in space-saving 8-pin 3mm × 2mm DFN and TSOT-8 packages.
This document describes the LTC2950, a micropower pushbutton controller designed to simplify the on/off interface for handheld devices. It integrates flexible timing circuits to de-bounce pushbuttons and provides controlled power-up and power-down sequences. The device is suitable for high-voltage multicell battery applications ranging from 2.7V to 26V.
| Input Voltage Range | 2.7V to 26V |
|---|---|
| Package Type | 8-pin 3mm × 2mm DFN and TSOT-8 |
| Turn-On De-bounce Time (Default) | 32ms |
| Power Down Blanking Timer | 1024ms |
| Quiescent Current (Typical) | 6µA |
The default turn-on de-bounce time is 32ms, which can be extended by adding an optional capacitor on the ONT pin.
It starts a 512ms blanking timer after enabling the converter; if the KILL input is not driven high within this time, it shuts off the converter.
It allows the microprocessor to perform power-down housekeeping functions before the device shuts down.