The device monitors the internal die temperature. If this temperature exceeds the thermal shutdown threshold value (T_SDN typically 160°C) the device shuts off. This is a non-latch protection. During start up, if the device temperature is higher than 160°C the device does not start switching and does not load the MODE settings. If the device temp goes higher than T_SDN threshold after startup, it stops switching with SS reset to ground and an internal discharge switch turns on to quickly discharge the output voltage. The device re-starts switching when the temperature goes below the thermal shutdown threshold but the MODE settings are not re-loaded again. There is a second higher thermal protection on the device T_{SDN VREG5} which protects it from over temperature conditions not caused by the switching of the device itself. This threshold is at typically 170°C. Even under nonswitching condition of the device after exceeding T_SDN threshold, if it still continues to heat up the VREG5 output shuts off after temperature goes beyond T_{SDN VREG5}, thereby shutting down the device completely.