MAX4923

The typical overvoltage trip level is set to 7.18V (MAX4923), 6.16V (MAX4924), 5.65V (MAX4925), and 4.46V (MAX4926). The undervoltage trip level is set to 2.44V (typ)for all devices. The MAX4923 overvoltage protection (OVP)controllers protect low-voltage systems against high-voltage faults of up to +28V with an appropriate external pFET. The input (IN)is ESD protected to ±15kV HBM when bypassed to ground with a 1F ceramic capacitor. All devices are offered in a small, 6-pin (1.5mm x 1.0mm)DFN package and are specified over the extended -40°C to +85°C temperature range. 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.

The features of MAX4923 can be summarized as (1)overvoltage protection up to +28V; (2)preset 7.18V, 6.16V, 5.65V, and 4.46V typical overvoltage trip levels; (3)preset 2.44V typical undervoltage trip level; (4)±2.5% accurate overvoltage/undervoltage trip levels; (5)low 13A (typ)supply current; (6)drives external pFET; (7)20ms adapter debounce time; (8)fault flag indicator; (9)6-pin (1.5mm x 1.0mm)DFN package.

The absolute maximum ratings of MAX4923 are (1)IN, GATE to GND:-0.3V to +30V; (2)FLAG to GND: -0.3V to +6V; (3)continuous power dissipation (TA = +70°C)6-DFN (derate 2.1mW/°C above 70°C): 168mW; (4)operating temperature range: -40°C to +85°C; (5)junction temperature: +150°C; (6)storage temperature range:: -65°C to +150°C; (7)lead temperature (soldering, 10s): +300 °C.