Semiconductor integrated circuit device, DC-DC converter, and voltage conversion method
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United States of America Patent
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Oct 28, 2014
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app pub date -
Aug 28, 2012
filing date -
Feb 10, 2012
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Abstract
A semiconductor integrated circuit device is employed in a DC-DC converter that switches the voltage fed to the load depending on the PWM signal. The semiconductor integrated circuit device has an error voltage generating part, a mode setting part, an oscillation signal generating part, a pulse generating part, and a control part. The oscillation signal generating part generates an oscillation signal with a prescribed period when in the non-light-load mode, and it turns off the oscillation signal when in the light-load mode. The pulse generating part generates a pulse signal before the oscillation signal generating part generates the oscillation signal when the pulse generating part switches from the light-load to the non-light-load mode.
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