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US 7,064,533 B2Granted
Efficiency improved voltage converter
AssigneeRichtek Technology Corporation
InventorChih-Yuan Hsu
Life of this patent
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Abstract
A voltage converter improves the efficiency thereof by connecting a boost converter and an LDO regulator with a buck converter in parallel. The boost converter boosts up a supply voltage to generate a first output voltage at a first output, and the buck converter bucks down the supply voltage to generate a second output voltage at a second output. When the second output voltage is lower than a threshold, the LDO regulator converts the first output voltage to a third voltage at said second output.
Claims3
An efficiency improved voltage converter comprising:
- a boost converter connected between a supply voltage and a first output for boosting up said supply voltage to generate a first output voltage at said first output;
- a buck converter connected between said supply voltage and a second output for bucking down said supply voltage to generate a second output voltage at said second output;
- and
- an LDO voltage regulator connected in series between said first output and said second output for converting said first output voltage to a third output voltage at said second output when said second output voltage is lower than a threshold value.
1 more element
Dependencies are inferred from the claim text.