Pushbutton control for management of power systems

15 November 2006 Power Electronics / Power Management

Linear Technology's LTC2952 is a versatile power management IC with pushbutton on/off control for system power and system monitoring features. The power management function features two controllers suitable for applications requiring an ideal diode-OR function for load sharing or automatic switchover between two input power sources. The low-loss switchover is achieved by regulating two external P-channel MOSFETs with 20 mV typical voltage drop when conducting and is configurable to satisfy various application requirements. The pushbutton controller provides enable control for DC-DC converters, processor's interrupt logic and adjustable ON and OFF debounce times. When powering off, the LTC2952 interrupts the system processor to alert it to perform the necessary power down and housekeeping tasks, resulting in graceful system shutdown. It also has robust system supervisory functions That make it well-suited for high reliability system applications. The LTC2952 operates over 2,7 V to 28 V and comes in 20-pin TSSOP and QFN packages. The device's functionality and reduced need for external components results in a much simplified power management solution.

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