In what conditions does the overheat protection circuit of a 3-terminal regulator operate?
It operates when the junction temperature (Tj) exceeds the absolute maximum rating (generally, 150°C) . It shuts off the output of the IC where Tj is 150 to 200°C.
|CMOS Operational Amplifiers|
|Bipolar Operational Amplifiers|
|3 Terminal Regulators|