www.DataSheet4U.com
19-0810; Rev 0; 4/07
Overvoltage Protectors with External pFET
General Description
The MAX4923–MAX4...
www.DataSheet4U.com
19-0810; Rev 0; 4/07
Over
voltage Protectors with External pFET
General Description
The MAX4923–MAX4926 over
voltage 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 over
voltage lockout (OVLO) threshold, or falls below the under
voltage 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. The typical over
voltage trip level is set to 7.18V (MAX4923), 6.16V (MAX4924), 5.65V (MAX4925), and 4.46V (MAX4926). The under
voltage trip level is set to 2.44V (typ) for all devices. The input (IN) is ESD protected to ±15kV HBM when bypassed to ground with a 1µF ceramic capacitor. All devices are offered in a small, 6-pin (1.5mm x 1.0mm) µDFN package and are specified over the extended -40°C to +85°C temperature range. o Over
voltage Protection Up to +28V o Preset 7.18V, 6.16V, 5.65V, and 4.46V Typical Over
voltage Trip Levels o Preset 2.44V Typical Under
voltage Trip Level o ±2.5% Accurate Over
voltage/Under
voltage Trip Levels o Low 13µA (typ) Supply Current o Drives External pFET o 20ms Adapter Debounce Time o Fault Flag Indicator o 6-Pin (1.5mm x 1.0mm) µDFN Package
Features
MAX4923–MAX4926
Applications
Cell Phones Digital Still Cameras PDAs and Palmtop Devices MP3 Players
INPUT +1.8V TO 28V
Typical Operating Circuit
P
OUTPUT
Pin Configurati...