5.15 Overvoltage Protection

The MCP16367/8/9 includes Overvoltage Protection (OVP) to minimize the output voltage overshoot, particularly during recovering from strong unload transients in designs with low output capacitance. In scenarios where the load is suddenly removed, the regulator output can increase faster than the response of the error amplifier, resulting in an output overshoot.

To address this, the OVP circuitry continuously monitors the feedback (FB) voltage and compares it to the OVP threshold, typically set at 860 mV. If the FB voltage exceeds this threshold, the high-side MOSFET is immediately turned off to prevent excessive output voltage.