The system overvoltage protection is to prevent SYS from overshooting to a high voltage due to the input supply. SYS_OVP will momentarily disconnect the blocking FETs and re-engage when the thresholds have dropped to less than the SYS_OVP_FALLING threshold.

The SYS_OVP_RISING threshold is typically 105% of the target SYS voltage and the SYS_OVP_FALLING threshold is 102.5% of the target SYS voltage.