| 摘要 |
A power control circuit controls a voltage supplied to a load circuit, such as a memory write driver circuit, that exhibits a current demand responsive to a load control signal applied thereto. The power control circuit includes a power supply input terminal configured to receive a supply voltage and an output terminal configured to connect to the load circuit. A voltage regulator circuit is connected between the power supply input terminal and the output terminal and operative to regulate a voltage at the output terminal. A bypass circuit is operative to couple the power supply input terminal to the output terminal responsive to the load control signal and thereby bypass the voltage regulator circuit. The bypass circuit preferably includes a bypass control circuit configured to receive the load control signal and operative to generate a bypass control signal responsive to the load control signal, and a switching circuit, e.g., a transistor, operative to couple and decouple the power supply input terminal and the output terminal responsive to the bypass control signal. Related methods are also discussed.
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