Analog Devices, Inc., which recently acquired Linear Technology Corporation, announces the LTC4418, a dual input power prioritizer for 2.5V to 40V systems. To enable portability, preserve memory during brownouts, and ensure a graceful shutdown on power loss, electronic systems employ batteries and capacitors for backup power. The LTC4418 normally powers the load from the higher priority main supply such as a wall adapter or main battery, switching to the backup supply—typically a battery or large value capacitor—during primary brownout or power loss conditions.