US 9,870,014 B1 · Digital low drop-out regulator

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.

Claims21

Dependent claims

A regulator comprising:

an analog-to-digital converting unit suitable for detecting a change in an output voltage from an output node and outputting an error code based on the detected result;
a digital processing unit suitable 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 suitable for outputting a first current in response to the pull-up and pull-down control signals to the output node;
and
a second driving unit suitable for outputting a second current in response to the sub-pull-up control signals to the output node.

2 more elements

A regulator comprising:

an analog-to-digital converting unit suitable for detecting a change in an output voltage from an output node and outputting an error code based on the detected result;
a control signal generation unit suitable for generating a proportional control signal, a plurality of integral control signals, and a counting signal, and an error sign signal based on the error code;
a proportional control unit suitable for shifting the error code based on a proportional gain factor, and outputting a first control signal by synchronizing the shifted error code with the proportional control signal;
a first driving unit suitable for outputting a first current in response to the first control signal to the output node;
an integral control unit suitable for shifting the integral control signals based on the counting signal and an integral gain factor at least two times, and outputting shifted results as a plurality of second control signals based on the error sign signal;
and
a second driving unit suitable for outputting a second current in response to the second control signals to the output node.

4 more elements

Dependencies are inferred from the claim text.

Digital low drop-out regulator

Life of this patent

Digital low drop-out regulator

Life of this patent

Abstract

Claims21