Hysteretic buck DC-DC converter
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United States of America Patent
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Sep 27, 2016
Grant Date -
Sep 17, 2015
app pub date -
Mar 11, 2014
filing date -
Mar 11, 2014
priority date (Note) -
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Abstract
A buck switching regulator includes a feedback control circuit using a four-input comparator to regulate the output voltage to a substantially constant level with reduced voltage offset and with fast transient response. In some embodiments, the buck switching regulator uses the four-input comparator to compare a first feedback signal without ripple and a second feedback signal with injected ripple components to a reference level. The four-input comparator generates an output signal to control the switching of the power switches. The buck switching regulator generates an output voltage with increased accuracy and fast transient response. Furthermore, the buck switching regulator can be used with output capacitor having any value of ESR.
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