OVERHEAT PROTECTION CIRCUIT AND VOLTAGE REGULATOR

摘要

To provide an overheat protection circuit which is not affected by a leak current while being low in current consumption and good in detection accuracy, and a voltage regulator equipped with the overheat protection circuit. An overheat protection circuit is configured to include a leak current detection circuit which detects that a leak current has flowed at a high temperature, a bias circuit which allows a bias current to flow in response to an output signal of the leak current detection circuit, and a temperature detection circuit operated by the bias current.

主权项

1. An overheat protection circuit comprising:
a temperature detection circuit; a bias circuit which allows a bias current to flow in the temperature detection circuit; and a leak current detection circuit which detects a leak current of a transistor allowing the bias current of the bias circuit to flow, said leak current detection circuit controlling the bias current when the leak current is detected.