Regulators with load-insensitive compensation

A system comprising:

• a voltage regulator having:
• an amplifier operable to receive an input voltage at a first input and a feedback voltage at a second input;
• a follower responsive to an output voltage of the amplifier at an output of the amplifier and operable to supply a regulated voltage to a load that is coupled to the follower and grounded to a ground;
• and
• a feedback circuit coupled to the load and the amplifier and operable to provide the feedback voltage,
• wherein the feedback circuit comprises:
• a capacitor coupled between the output of the amplifier and the second input of the amplifier, and
• a resistor having a first end coupled within the load and between an output of the follower and the ground and a second end coupled to the second input of the amplifier, and
• wherein a capacitance of the capacitor and a resistance of the resistor are configured at least partially based on an estimated varying range of the load, such that the amplifier is operable to have a stable and substantially unity gain beyond a resonant frequency of the amplifier and the voltage regulator is operable to work substantially independently of a loading condition of the load.

A method comprising:

• applying an input voltage to a first input of an amplifier and a feedback voltage to a second input of the amplifier;
• applying an output voltage of the amplifier from an output of the amplifier to a follower;
• supplying a regulated voltage by the follower to a load that is coupled to the follower and grounded to a ground, the regulated voltage being based on the output voltage;
• providing, by a feedback circuit coupled to the load and the amplifier, the feedback voltage to the amplifier,
• wherein the feedback circuit comprises:
• a capacitor coupled between the output of the amplifier and the second input of the amplifier, and
• a resistor having a first end coupled within the load and between an output of the follower and the ground and a second end coupled to the second input of the amplifier, and
• wherein a capacitance of the capacitor and a resistance of the resistor are configured at least partially based on an estimated varying range of the load, such that the amplifier has a stable and substantially unity gain beyond a resonant frequency of the amplifier.