| 摘要 |
An internal power-supply circuit generates an internal voltage based on a reference voltage, and has an external-power-supply terminal to which an external power-supply voltage having a first potential is applied during a normal operation and an external power-supply voltage having a second potential that is higher than the first potential is applied during a burn-in acceleration test, a reference-voltage generating unit for generating the reference voltage from the external power-supply voltage, and an internal-voltage generating unit for generating the internal voltage based on the reference voltage. The reference-voltage generating unit generates, during the normal operation, a normal reference voltage that is independent of the potential of the external power-supply voltage and generates, during the burn-in acceleration test, a first burn-in reference voltage that is dependent on the potential of the external power-supply voltage and a second burn-in reference voltage that has the same potential as the normal reference voltage.
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