Dual Input Prioritizer Provides Low Quiescent Current Backup Supply Switchover Solution

MILPITAS, CA and NORWOOD, MA – September 14, 2017 – 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. With up to 40V operating capability, the LTC4418 accommodates a wide range of power sources such as wall adapters, USB ports, supercapacitors, and multicell lead-acid, Li-Ion, or NiMH batteries. A low 26µA operating quiescent current and a shutdown mode make the LTC4418 ideal for portable battery-operated systems.

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