Digital low drop-out regulator
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United States of America Patent
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Jan 16, 2018
Issued Date -
N/A
app pub date -
Feb 3, 2017
filing date -
Feb 3, 2017
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Abstract
A regulator may comprise: an ADC unit for detecting a change in an output voltage and outputting an error code based on the detected result; a digital processing unit for generating a proportional control signal, a plurality of integral control signals, a counting signal, and an error sign signal based on the error code, outputting pull-up and pull-down control signals by multiplying the error code by a proportional gain factor in response to the proportional control signal, and outputting a plurality of sub-pull-up control signals by performing integration on the integral control signals based on the counting signal and multiplying the integration result by an integral gain factor; a first driving unit for outputting a first current in response to the pull-up and pull-down control signals; and a second driving unit for outputting a second current in response to the sub-pull-up control signals.
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