Patent ID: 8461818

Claim:
A device for improving transient response of a power supply, the device comprising: a diode connected in series with an output of the power supply and configured to provide a predetermined voltage drop to an output voltage of the power supply; a source follower transistor connected in parallel with the diode and configured to be selectively activated, partially or entirely bypassing the diode, to remove at least a portion of the predetermined voltage drop of the diode from the output voltage of the power supply for quickly increasing the output voltage during a transient period, in which an output current of the device is increasing; a differential amplifier driver configured to output a drive voltage by summing a quiescent current signal and a gain stage voltage, an output of the differential amplifier driver being connected to a gate of the transistor for selectively activating the transistor based on the drive voltage; and a gain stage amplifier configured to output the gain stage voltage by comparing an error voltage from an error amplifier in the power supply and a common voltage.