5.15 Overvoltage Protection

The MCP16367/8/9 incorporates an Overvoltage Protection (OVP) to minimize the output voltage overshoot when recovering from strong unload transients in designs with low-output capacitance. For example, in applications where the output voltage is overloaded when the load is removed, the regulator output can increase faster than the response of the error amplifier, resulting in an output overshoot.

The OVP circuitry compares the FB voltage to the OVP threshold, which is typically set at 860 mV, and immediately turns off the high-side MOSFET.