| 摘要 |
A voltage protection circuit that has a protection transistor coupled between a voltage supply pin of an integrated circuit and a voltage output terminal of the integrated circuit. A biasing circuit is coupled to a control node of the protection transistor and configured to cause the protection transistor to turn on to form a low impedance path between the voltage supply pin and the voltage output terminal when a positive supply voltage is coupled to the voltage supply terminal and to cause the protection transistor to turn off when a negative supply voltage is coupled to the voltage supply terminal. An electro-static discharge (ESD) protection circuit may also be connected between the voltage supply pin and a reference node that is configured to conduct a negative static discharge current for period of time, and to not conduct a negative current continuously.
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