A first controller for a power converter, the first controller comprising a driver, supply terminal, branch switch and branch control. The driver configured to provide a drive signal to turn ON and turn OFF a power switch. The power switch includes a first switch and a second switch coupled in a cascode configuration. The supply terminal coupled to a bypass capacitor that provides operating power to the first controller, wherein the bypass capacitor has a bypass voltage. The branch switch coupled to a node between the first switch and the second switch. The branch control configured to receive a regulation signal representative of a comparison of the bypass voltage to a bypass reference and is configured to turn ON the branch switch if the bypass voltage is below the bypass reference to redirect at least a portion of a drain current of the power switch to the bypass capacitor.