Voltage regulators

A voltage regulator configured to generate an output voltage, comprising:

• an error amplifier circuit configured to generate a gate voltage based on a first reference voltage level, a second reference voltage level, a first voltage level of a first end of a target circuit, and a second voltage level of a second end of the target circuit;
• and
• at least one pass transistor configured to generate the output voltage in response to the gate voltage,
• wherein the first end of the target circuit is connected to the pass transistor through a circuit line,
• wherein a potential difference between the first reference voltage level and the second reference voltage level is a reference voltage, and
• wherein a potential difference between the first voltage level and the second voltage level is an operating voltage of the target circuit.

An electronic system comprising:

• a plurality of electronic devices;
• and
• a power management integrated circuit including a voltage regulator configured to provide an output voltage to the plurality of electronic devices,
• wherein the voltage regulator includes:
• an error amplifier circuit configured to generate a gate voltage based on
• a first voltage level of a first node connected to a first end of target circuits included in each of the plurality of electronic devices, the first ends of the target circuits being provided with an operating current,
• a second voltage level of a second node connected to second ends of the target circuits,
• a first reference voltage level, and
• a second reference voltage level.