The LM5160 must be operated such that the junction temperature does not exceed 150°C during normal operation. An internal thermal shutdown circuit is provided to protect the LM5160 in the event of higher than normal junction temperature. When activated, typically at 175°C, the controller is forced into a low-power reset state, disabling the high-side buck switch and the VCC regulator. This feature prevents catastrophic failures from accidental device overheating. When the junction temperature falls below 155°C (typical hysteresis of 20°C), the VCC regulator is enabled and operation resumes.