General Description
The MAX4923–MAX4926 overvoltage protection (OVP) controllers protect low-voltage systems against high-voltage faults of up to +28V with an appropriate external pFET. When the input voltage exceeds the overvoltage lockout (OVLO) threshold, or falls below the undervoltage lockout (UVLO) threshold, these devices turn off the pFET to prevent damage to protected components and issue a flag to notify the processor of a fault condition.

Features
♦ Overvoltage Protection Up to +28V
♦ Preset 7.18V, 6.16V, 5.65V, and 4.46V Typical
   Overvoltage Trip Levels
♦ Preset 2.44V Typical Undervoltage Trip Level
♦ ±2.5% Accurate Overvoltage/Undervoltage
   Trip Levels
♦ Low 13µA (typ) Supply Current
♦ Drives External pFET
♦ 20ms Adapter Debounce Time
♦ Fault Flag Indicator
♦ 6-Pin (1.5mm x 1.0mm) µDFN Package

Applications
   Cell Phones
   Digital Still Cameras
   PDAs and Palmtop Devices
   MP3 Players