Abstract: Embodiments of the disclosure relate to redundant controllers to improve design robustness in voltage regulation modules. Aspects include detecting, by a control switch, a failure of a first controller of a first circuit, the first circuit controlling power output from at least one phase. Aspects include initiating, by the control switch, a second controller of a second circuit to retrieve an image for operating the at least one phase. Aspects include receiving, from the second controller, a control signal having commands for operating the at least one phase based on the image.

Abstract: A device may include an AC input. A device may include a DC output. A device may include power blocks. A device may include a controlling chip configured to detect a fault in one of the power blocks and isolate the power block with the fault while allowing power to flow through other power blocks.