A power converter for converting input power into regulated output power, the power converter comprising: an input node for receiving the input power; a first output node (OUTPUT of FIG. 1) for providing the regulated output power; a first switched-mode main regulator (L1, S1, S2, CFILT of FIG. 1) connected between the input node and the first output node to contribute main energy for regulation of the output power at the first output node; a first supplemental energy storage element (CSTOR of FIG 1); a first supplemental energy gating element (AUX FLYBACK of FIG. 1) connected between a first main inductive element (L1 of FIG 1) of the first switched-mode main regulator and the first supplemental energy storage element; a first supplemental regulator connected between the first supplemental energy storage element and the first output node to contribute supplemental energy from the first supplemental energy storage element for the regulation of the output power at the first output node; and a controller configured to control the first switched-mode main regulator to (i) operate a first main energy gating element (S1 of FIG. 1) of the first switched-mode main regulator to energize the first main inductive element of the first switched-mode main regulator by admitting input current into the first main inductive element in proportion to input voltage at the input node and (ii) selectively allow energy to flow from the first main inductive element to a selected one of (a) the first output node via a second main energy gating element (S2 of FIG 1) of the first switched-mode main regulator and (b) the first supplemental energy storage element via the first supplemental energy gating element. an input node for receiving the input power; a first output node (OUTPUT of FIG. 1) for providing the regulated output power; a first switched-mode main regulator (L1, S1, S2, CFILT of FIG. 1) connected between the input node and the first output node to contribute main energy for regulation of the output power at the first output node; a first supplemental energy storage element (CSTOR of FIG 1); a first supplemental energy gating element (AUX FLYBACK of FIG. 1) connected between a first main inductive element (L1 of FIG 1) of the first switched-mode main regulator and the first supplemental energy storage element; a first supplemental regulator connected between the first supplemental energy storage element and the first output node to contribute supplemental energy from the first supplemental energy storage element for the regulation of the output power at the first output node; and a controller configured to control the first switched-mode main regulator to (i) operate a first main energy gating element (S1 of FIG. 1) of the first switched-mode main regulator to energize the first main inductive element of the first switched-mode main regulator by admitting input current into the first main inductive element in proportion to input voltage at the input node and (ii) selectively allow energy to flow from the first main inductive element to a selected one of (a) the first output node via a second main energy gating element (S2 of FIG 1) of the first switched-mode main regulator and (b) the first supplemental energy storage element via the first supplemental energy gating element.