| 摘要 |
A voltage regulator includes a first phase power stage, a second phase power stage, and a controller. The first phase power stage includes a zero cross detection circuit configured to measure a current level for the first phase power stage, and to cause a diode emulation state in the first phase power stage when the current level is substantially equal to zero. The second phase power stage is in communication with the zero cross detection circuit, and configured to enter the diode emulation state in response to receiving a signal from the zero cross detection circuit. The controller is coupled to the first phase power stage and to the second phase power stage. The controller is configured to measure an output current of the voltage regulator and to activate the second phase power stage when the output current is above a first threshold current level.
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