Buck converter with power saving mode
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United States of America Patent
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Jan 19, 2021
Grant Date -
Oct 8, 2020
app pub date -
Apr 4, 2019
filing date -
Apr 4, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A buck converter is disclosed that may operate in a low power mode or a high power mode based on a power requirements of a load. In the high power mode, modifications to increase frequency response include a higher polling frequency for a comparator, a lower impedance divider in a feedback circuit, a higher biasing current for a comparator, and larger switches for providing current to a reactive step-down circuit of the buck converter. In the low power mode these modifications are reversed. The buck converter may make use of an improved strong arm comparator and a circuit for sensing presence of an inductor in the reactive step-down circuit.
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