Patent ID: 8760132
Filing Date: 2014-06-24
Classification: H02M,Y02B

Abstract:
1. An output stage for a voltage regulator configured to provide a regulated supply to an apparatus when the apparatus is in a standby mode and comprising: at least one switchable output device having a control terminal, a first conduction terminal to be coupled to a first voltage supply, and a second conduction terminal providing the regulated supply; a clamping circuit being controlled in a supply independent mode and comprising a clamping device to reduce voltage swings on the control terminal when the apparatus is not in the standby mode, thereby allowing a faster switching of said at least one switchable output device when the apparatus is switched to the standby mode; a sense transistor having a control terminal coupled to the control terminal of said at least one switchable output device, a first conduction terminal to be coupled to the first voltage supply, and a second conduction terminal coupled to a bias point, said sense transistor configured to sense a voltage of said at least one switchable output device and, when the apparatus is in the standby mode, drives a voltage at the bias point high to force said clamping circuit off; and a further device having a control terminal coupled to the bias point, a first conduction terminal to be coupled to the first voltage supply, and a second conduction terminal coupled to the control terminal of said clamping device.