If the over-current conditions persist, eventually the device temperature reaches a point at which it has to be turned off to protect itself (typically 150°C). The over-temperature circuit is comprised of a temperature sensor and hysteresis circuitry. This over-temperature thermal shutdown circuit is active for input voltages of 3V or more and constantly monitors the junction temperature. It does so independently of over-current and clamping. Once the temperature of the power device reaches the threshold temperature the thermal shutdown circuit turns the internal gate off and interrupts the dissipation. The hysteresis of this circuit ensures that the output of the device will turn back on again when the power device has cooled by approximately 10°C.