Switching regulator with boosted auxiliary winding supply

A switched-power circuit, comprising:

• an inductive storage element for coupling an input of the switched-power circuit to an output of the switched-power circuit and having a primary winding and an auxiliary winding;
• a switching circuit for controlling charging of the inductive storage element from an input voltage source connected to the input of the switched-power circuit to the primary winding of the inductive storage element;
• a control circuit coupled to the switching circuit for generating control signals for operating the switching circuit in response to a feedback signal provided from the output of the switched-power circuit;
• and
• a boost circuit having a boost input coupled to the auxiliary winding of the inductive storage element for supplying power to the control circuit from a boost output, wherein the boost circuit provides a boost output voltage at the boost output that is boosted to a voltage substantially greater than a voltage across the auxiliary winding at least during start-up of the switched-power circuit by storing energy provided from the auxiliary winding in a storage inductance at a voltage substantially equal to the voltage across the auxiliary winding and releasing energy from the storage inductance at the substantially greater voltage of the boost output.