CPC G05F 1/575 (2013.01) | 19 Claims |
1. 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 in a control loop for the output stage 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, wherein said reconfiguration of the output stage results in a change of current which is independent of the operation of the control loop such that a given value of amplifier output will lead to a different value of output current before and after the reconfiguration of the output stage.
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