The TPS25981xx has an integrated output discharge function which can be helpful in quickly removing residual charge left on the large output capacitors and avoids bus floating at some undefined voltage. The internal QOD pulldown FET on the OUT pin is activated when the EN/UVLO is held low (V_EN < V_UVLO(F)). The output discharge function can result in excess power dissipation inside the device leading to increase in junction temperature. The output discharge is disabled if the junction temperature (T_J) crosses the thermal shutdown threshold (TSD) to avoid long term degradation of the part.