A controller operates a power supply in a discontinuous mode. While in the discontinuous mode, a monitor resource in the controller monitors current supplied by an inductor resource in the power supply to produce an output voltage to power a load. An adjustment value generator produces an adjustment value based on a magnitude of the current supplied to the load by the inductor resource. According to one configuration, the adjustment value equals the average inductor current multiplied by the load-line resistance value of the power supply. The controller produces an adjusted trigger threshold value by reducing a trigger threshold value by the adjustment value generated by the adjustment value generator. The adjusted trigger threshold value specifies a reduced threshold voltage at which the power supply controller turns ON a control switch in the power supply to increase an amount of current supplied by the inductor resource to the load.