High-efficiency DC/DC voltage converter including capacitive switching pre-converter and up inductive switching post-regulator
First Claim
1. A DC/DC voltage converter comprising:
- a pre-converter comprising a switched capacitive circuit; and
a post-regulator comprising a switched inductive circuit,wherein an output terminal of the pre-converter is coupled to an input terminal of the post-regulator, an input terminal of the pre-converter comprising an input terminal of the DC/DC voltage converter, an output terminal of the post-regulator comprising an output terminal of the DC/DC voltage converter.
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Accused Products
Abstract
A DC/DC converter includes a pre-converter stage, which may include a charge pump, and a post-regulator stage, which may include a boost converter. The duty factor of the post-regulator stage is controlled by a feedback path that extends from the output terminal of the DC/DC converter to an input terminal in the post-regulator stage. The pre-converter steps the input DC voltage up or down by a positive or negative integral or fractional value, and the post-regulator steps the voltage up by a variable amount depending on the duty factor at which the post-regulator is driven. The converter overcomes the problems of noise glitches, poor regulation, and instability, even near unity input-to-output voltage conversion ratios.
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Citations
28 Claims
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1. A DC/DC voltage converter comprising:
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a pre-converter comprising a switched capacitive circuit; and a post-regulator comprising a switched inductive circuit, wherein an output terminal of the pre-converter is coupled to an input terminal of the post-regulator, an input terminal of the pre-converter comprising an input terminal of the DC/DC voltage converter, an output terminal of the post-regulator comprising an output terminal of the DC/DC voltage converter. - View Dependent Claims (2, 4, 5, 6, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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3. (canceled)
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7. (canceled)
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9. (canceled)
Specification