Distributed and scalable all-digital low dropout integrated voltage regulator

An apparatus comprising:

• an all-digital proportional-integral-derivative (PID) controller that receives a first code indicative of a voltage behavior on a power supply rail;
• a droop detector to compare the first code with a threshold to determine a droop event, wherein information about the droop event is provided to the PID controller, wherein the PID controller generates a second code according to the first code and the information about the droop event;
• and
• a plurality of power gates that receive the second code.

A system comprising:

• a memory;
• a processor coupled to the memory;
• and
• a wireless interface to allow the processor to communicate with another device, wherein the processor includes a logic domain which includes a plurality of digital low dropout (DLDO) regulators distributed in the logic domain, wherein an individual DLDO regulator comprises:
• a first circuitry to monitor a supply voltage and to generate a first code indicative of a digital representation of the supply voltage;
• a second circuitry to receive the first code and to determine whether the supply voltage drooped, and to generate a droop indication if the supply voltage drooped;
• a third circuitry to receive the first code or a version of the first code along with the droop indication, wherein the third circuitry is to generate a second code according to the first code or a version of the first code and the droop indication;
• and
• power gates (PGs) coupled to an input supply voltage rail and an output supply voltage rail, wherein the PGs are controlled by the second code or a version of the second code.