Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Seiji Yamahira0
Date of Patent
June 28, 2011
0Patent Application Number
124970900
Date Filed
July 2, 2009
0Patent Primary Examiner
Patent abstract
An output terminal of a first boost circuit is connected to a second boost circuit. After the second boost circuit is started up, a boost clock frequency of the second boost circuit is reduced. A time required to start up the second boost circuit is reduced, and in addition, a current supply capability of the first boost circuit is increased after the second boost circuit is started up. When the second boost circuit is driven, output voltages of the first and second boost circuits are stably supplied without instantaneously changing the output voltage of the first boost circuit.
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