The OPA593 has internal thermal protection. When the junction temperature reaches approximately 170°C, the op amp output stage disables and the overtemperature flag (Thermal Flag pin) is asserted, which pulls the flag pin low to E/D Com. When the junction temperature cools to a safe operating temperature, approximately 150°C, the output stage is enabled, and the op amp resumes normal operation. This flag is an open-drain output compatible with standard low-voltage logic circuitry, such as an MCU. Use a 5‑kΩ to 10‑kΩ pullup resistor to limit the input current when the flag is asserted. If this feature is not used, leave this pin floating.