Adaptive gain for compensation in a digital voltage regulator

An apparatus, comprising:

• a programmable register to store data indicating a correspondence between a code and a gain;
• and
• a circuit to read the data, to set a value of the gain based on a current value of the code and the correspondence between the code and the gain, and to set a new value for the code based on the value of the gain and an error signal indicating an error of a voltage output of a plurality of current sources, wherein selected current sources of the plurality of current sources are turned on based on the code.

An apparatus, comprising:

• a plurality of power gates;
• and
• a control circuit coupled to the plurality of power gates, the control circuit to set a code to turn on selected power gates of the plurality of power gates, the plurality of power gates to provide an output current and an output voltage to a load based on the code, and the control circuit to implement a control loop which minimizes an error of the output voltage, wherein to implement the control loop, the control circuit updates the code in successive clock cycles based on the error and a value of the code.