SLVS839F July 2008 – October 2014 TPS54331
The TPS54331 device incorporates an overvoltage transient-protection (OVTP) circuit to minimize output voltage overshoot when recovering from output fault conditions or strong unload transients. The OVTP circuit includes an overvoltage comparator to compare the VSENSE pin voltage and internal thresholds. When the VSENSE pin voltage goes above 109% × Vref, the high-side MOSFET is forced off. When the VSENSE pin voltage falls below 107% × Vref, the high-side MOSFET is enabled again.