The TPS25946xx allows the user to implement Overvoltage Lockout to protect the load from input overvoltage conditions. The OVLO comparator on the OVLO pin allows the Overvoltage Protection threshold to be adjusted to a user defined value. After the voltage at the OVLO pin crosses the OVLO rising threshold V_OV(R), the device turns off the power to the output. Thereafter, the devices wait for the voltage at the OVLO pin to fall below the OVLO falling threshold V_OV(F) before the output power is turned ON again. The rising and falling thresholds are slightly different to provide hysterisis. The Figure 8-4 and Equation 2 show how a resistor divider can be used to set the OVLO set point for a given voltage supply.

While recovering from a OVLO event, the TPS25946xx starts up with inrush control (dVdt).