Power supply control solutions ... at the touch of a button; high performance analog solutions from Linear Technology.

EDN, July, 2005

Portable devices need to draw minimal current when off--ideally zero--to maximize battery life. Implementing push-button on/off control disconnects everything from the battery except the push-button control circuitry. Providing graceful power-up and power-down with minimal board space and minimal current draw is challenging, particularly when higher voltage battery packs are used. Linear Technology addresses the push-button interface challenge with a pair of tiny controllers.

The LTC[R]2950 integrates a push button controller that provides enable control for DC/DC converters with processor interrupt logic and adjustable debounce timers. The part solves the inherent bounce problem associated with all mechanical contacts and operates over a 2.7V to 26V input...

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