Buck DC-DC converter with fixed frequency

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United States of America Patent

PATENT NO 9467043
APP PUB NO 20150280557A1
SERIAL NO

14226548

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Abstract

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A buck switching regulator implements a fixed frequency feedback control circuit including a voltage control loop and a frequency control loop to regulate the switching frequency of the buck switching regulator to a fixed or nearly fixed frequency. The voltage control loop, implementing ripple mode control, is configured to control the power switches in response to the switching regulator output voltage or a signal related to the switching regulator output voltage. The frequency control loop, implementing a phase-locked loop control scheme, is configured to adjust the on-time of the high-side switch so as to regulate the switching frequency to be equal to or be proportional to the reference frequency.

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Patent Owner(s)

Patent OwnerAddress
MICROCHIP TECHNOLOGY INCORPORATED2355 WEST CHANDLER BLVD CHANDLER AS 85224-6199

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
MacLean, William Austin, US 8 126
Xue, Dashun Austin, US 13 128

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