ZHCST52A September 2023 – November 2023 TPS7B4256-Q1
PRODUCTION DATA
Thermal protection disables the output when the junction temperature rises to approximately 175°C, which allows the device to cool. When the junction temperature cools to approximately 160°C, the output circuitry enables. Although the device can enable at such high temperatures, the device parameters and performance are specified up to a junction temperature of 150°C. Based on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit can cycle off and on until the condition that causes excessive power dissipation is removed. This cycling limits the dissipation of the regulator, thus protecting the regulator from damage as a result of overheating.
The internal protection circuitry of the TPS7B4256-Q1 is designed to protect against overload conditions. This circuitry is not intended to replace proper heat sinking. Continuously running the TPS7B4256-Q1 into thermal shutdown degrades device reliability.