Linear Technology Corporation introduces the LTC2950, a push button controller that provides enable control for DC/DC converters, processor interrupt logic and adjustable on/off timers. The part easily solves the inherent bounce problem associated with all mechanical contacts, while also enabling power supply converters and releasing a processor once the supply is fully powered up. When powering off, the LTC2950 interrupts the system processor to alert it to perform the necessary power down and housekeeping tasks. Once the system completes the turn off operations, it can command the LTC2950 to immediately disable power. Offered in a tiny 8-pin 2mm x 3mm DFN package, the LTC2950 saves design time, as well as precious board space for portable instruments and handheld products.
The LTC2950 operates over a wide 2.7V to 26V input voltage range to accommodate a wide variety of input power supplies. The very low 6uA supply current makes the IC ideal for battery powered applications. Two versions of the LTC2950 are available to accommodate either positive or negative enable polarities. The rugged push button input pin is designed to operate in noisy environments and it can withstand ESD strikes of up to ±10kV.
Specified over the commercial and industrial temperature range and available from stock, pricing begins at $1.75 each for 1,000 piece quantities.
Summary of Features: LTC2950
Adjustable Push Button On/Off Timers
Wide Operating Voltage Range
Low Supply Current: 6uA
EN Output (LTC2950-1) Allows DC/DC Converter Control
EN Output (LTC2950-2) Allows Circuit Breaker Control
Simple Interface Allows Graceful µP Shutdown
±10kV ESD on Push Button input
8-pin 2mm x 3mm DFN and ThinSOT™