7.3.6 Thermal Overload Protection (T_SD)

Thermal shutdown disables the output when the junction temperature rises to approximately 160°C which allows the device to cool. When the junction temperature cools to approximately 145°C, the output circuitry enables. Based on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may cycle on and off. This thermal cycling limits the dissipation of the regulator and protects it from damage as a result of overheating.

The thermal shutdown circuitry of the LP5907-Q1 has been designed to protect against temporary thermal overload conditions. The thermal shutdown circuitry was not intended to replace proper heat-sinking. Continuously running the LP5907-Q1 device into thermal shutdown may degrade device reliability.