Low-dropout (LDO) regulator with a feedback circuit

A voltage regulator circuit, comprising:

• a voltage regulator configured to provide an output voltage at an output terminal;
• a connector connected to the output terminal, the connector comprising a plurality of connection nodes spaced along a length of the connector;
• a plurality of macros connectable at the plurality of connection nodes spaced along the length of the connector, wherein each one of the plurality of macros are connectable to one of the plurality of connection nodes spaced along the length of the connector;
• and
• a plurality of feedback loops connectable between the plurality of connection nodes spaced along the length of the connector and an input terminal of the voltage regulator, wherein each of the plurality of feedback loops, when connected to a corresponding connection node of the plurality of connection nodes through a feedback switch, is configured to provide an instantaneous voltage of the corresponding connection node as a feedback to the voltage regulator, and wherein the voltage regulator is configured, in response to the instantaneous voltage, regulate the output voltage to maintain the instantaneous voltage of the corresponding connection node approximately equal to a reference voltage.

A method of providing a supply voltage, the method comprising:

• providing, by a low-dropout voltage regulator, a supply voltage to a plurality of macros connectable at a plurality of connection nodes spaced along a length of a connector connected to an output terminal of the low-dropout voltage regulator, wherein each one of the plurality of macros are connectable to one of the plurality of connection nodes spaced along the length of the connector;
• receiving an instantaneous voltage of a connection node of the plurality of connection nodes through a feedback loop of a plurality of feedback loops connectable between the plurality of connection nodes spaced along the length of the connector at an amplifier of the low-dropout voltage regulator and an input terminal of the amplifier, wherein each one of the plurality of feedback loops are connectable to one of the plurality of connection nodes spaced along the length of the connector through a feedback switch associated with the one of the plurality of feedback loops;
• determining, by the amplifier, a difference between the received instantaneous voltage and a reference voltage;
• and
• adjusting, based on the determined difference, an amount of a source current being sinked by a current source at the output terminal of the low-dropout voltage regulator, wherein the current source is connected in series with the amplifier, and wherein adjusting the amount of the source current being sinked by the current source comprises adjusting the amount of the source current being sinked by the current source to maintain the supply voltage approximately equal to the reference voltage.