Digitally controlled low dropout regulator

Abstract

To provide a digitally controlled LDO regulator that can control an output voltage even during an auto-zero processing period. A digitally controlled low dropout regulator is provided that includes a plurality of AD converters and an impedance variable circuit, each of the plurality of AD converters including a comparator, in which a first signal from each of the plurality of AD converters is input to the impedance variable circuit; a second signal output from the impedance variable circuit is input to one of two terminals of each of the plurality of AD converters; when one of the plurality of AD converters is in operation, another of the plurality of AD converters performs auto-zero processing to set a voltage value used as a reference; and the comparator compares a voltage value of the second signal input to the one of the two terminals with the set voltage value.

Dependencies are inferred from the claim text.