Method and system for supplying power to multiple voltage islands using a single supply source (SSS)
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United States of America Patent
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Jan 19, 2016
Grant Date -
Jul 19, 2012
app pub date -
Mar 29, 2012
filing date -
Feb 12, 2007
priority date (Note) -
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Abstract
Methods and systems for supplying power to multiple voltage islands using a single supply source are disclosed. Aspects of one method may include providing power to a first of a plurality of voltage islands, and individually controlling providing of power to each of a remaining portion of the plurality of voltage islands. For example, when an electronic system is first powered on, a low current voltage source may be used to supply power to a primary voltage island. As a higher current voltage source becomes available, power derived from the higher current voltage source may be provided to the primary voltage island and to secondary voltage islands. Power to each of the secondary voltage islands may be, for example, individually controlled via a power MOS transistor. The power MOS transistor may also be configured to allow a faster blocking time than unblocking time.
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