Power-efficient multi-mode charge pump
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United States of America Patent
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Sep 9, 2014
Grant Date -
Aug 25, 2011
app pub date -
Sep 8, 2010
filing date -
Feb 25, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a power-efficient multi-mode charge pump. The charge pump comprises a first pumping circuit that provides at least one output voltage produced by a discharge sequence of a shared flyback capacitor. The charge pump also comprises a second pumping circuit that provides a plurality of output voltages produced by a corresponding plurality of discharge sequences of the shared flyback capacitor. The charge pump may include a transition circuit to selectably enable the first pumping circuit or the second pumping circuit. In one embodiment, the first pumping circuit may employ a two-phase discharge sequence. In another embodiment, the second pumping circuit may employ a three-phase plurality of discharge sequences. A related method is also disclosed.
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