Patent ID: 8908391

Claim:
A post regulator controller for use in a power converter having a regulated output and an additional output, the controller comprising: a transistor coupled to be switched between an OFF state and an ON state in response to an error signal that is representative of the additional output; and an inductor coupled to the transistor and to be coupled to the regulated output of the power converter to generate a drive current through the inductor from the regulated output through the transistor to an output return when the transistor is in the ON state, wherein the drive current is prevented from conducting through the transistor and a drive voltage develops across the inductor in response to the transistor switching to the OFF state, wherein the inductor is to be coupled to provide a sufficient charge to a gate terminal of a post regulator switch when the transistor is in the OFF state to enable the post regulator switch to redirect energy from the regulated output to the additional output of the power converter, wherein, when the post regulator switch is enabled, a switch current flows from the regulated output through the post regulator switch to the additional output.