Switching regulator and control method thereof
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United States of America Patent
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Feb 28, 2017
Grant Date -
Aug 13, 2015
app pub date -
Sep 3, 2013
filing date -
Sep 4, 2012
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Abstract
A switching regulator including an output switch element; a rectification switch element; an oscillation circuit; an error amplifier circuit; a slope circuit; a first voltage comparison circuit; a second voltage comparison circuit; a one pulse generation circuit; a control circuit; and a backflow detection circuit, and a control method thereof suppress variations to be stabilized with respect to a target value of the load current for switching between a PWM control and a PFM control, and ensure the switching from the PFM control to the PWM control or from the PWM control to the PFM control even if various parameters including external elements such as chips, coils, and capacitors vary.
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