7.3.8 Thermal Shutdown

The LM25011 should be operated so the junction temperature does not exceed 125°C. If the junction temperature increases above that, an internal thermal shutdown circuit activates (typically) at 155°C, taking the controller to a low-power reset state by disabling the buck switch and taking the SS pin to ground. This feature helps prevent catastrophic failures from accidental device overheating. When the junction temperature decreases below 135°C (typical hysteresis = 20°C), normal operation resumes.