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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 (...