DC-DC converter enabling rapid output voltage changes
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United States of America Patent
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Jun 30, 2015
Grant Date -
Sep 26, 2013
app pub date -
May 1, 2013
filing date -
Feb 18, 2012
priority date (Note) -
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Abstract
Embodiments for methods, apparatus and systems for operating a voltage regulator are disclosed. One embodiment of the voltage regulator generates a switching voltage through controlled closing and opening of a series switch element and a shunt switch element. The voltage regulator further includes a switched output filter that includes a plurality of capacitors for filtering the switching voltage and generating an output voltage. A mode controller is operative to disconnect at least one of the plurality of capacitors upon receiving a first indicator, where disconnecting causes the at least one of the plurality of capacitors to electrically float, wherein while the at least one capacitor is disconnected the output voltage is changed from a first value to a second value, return the output voltage to a first value or a third value upon receiving a second indicator, and reconnect the at least one of the plurality of capacitors.
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