Voltage regulators

A voltage regulator comprising:

• an output stage comprising an input node for receiving an input voltage;
• an output node for outputting an output voltage;
• and an output device comprising at least one transistor configured to pass an output current to the output node based on a drive voltage at a control node;
• a differential amplifier configured to receive a feedback signal derived from the output voltage at a first input and to receive a reference voltage at a second input and to generate an amplifier output to control the drive voltage of the output stage to minimise any difference between the feedback signal and the reference voltage;
• and
• a controller operable to selectively reconfigure the output stage to provide a change in output current in response to a load activity signal indicative of a change in load activity that results in a change in load current demand for a load connected, in use, to the output node;
• and
• a digital-to-analogue converter (DAC) coupled to the control node such that a variation in the DAC output results in a variation in the drive voltage and wherein the controller is configured to control the output of the DAC;
• wherein the controller is operable to reconfigure the output stage to provide a variation in the drive voltage so as to provide at least some of said change in output current.