An input/output driver for interfacing directly with a voltage at a pad which is above a supply voltage for the input/output driver. This may be referred to as an “overvoltage condition.” For example, if the supply voltage is 3.3 volts, a 5-volt signal may be provided at the pad of the input/output driver. The input/output driver will tolerate this voltage level and prevent leakage current paths. This will improve the performance, reliability, and longevity of the integrated circuit. The input/output driver includes a well-bias generator for preventing leakage current paths.