Techniques are disclosed to regulate the output power of a power supply. An example technique for regulating a power supply output includes regulating in response to a feedback signal an output current of a power supply in a regulated current region of operation if an output voltage of the power supply is less than a second transition voltage. The output voltage and the output current of the power supply are regulated in a transition region current region of operation in response to the feedback signal if the output voltage of the power supply is between first and second transition voltages or if the output current of the power supply is between first and second transition currents.