Method and apparatus for regulating multiple outputs of a single inductor DC to DC converter

摘要

A method and apparatus for regulating multiple outputs of a single inductor DC to DC converter includes processing that begins by producing a regulation signal to regulate a 1^st output of the multiple outputs based on at least one of the multiple outputs. The processing then continues by identifying one of the multiple outputs to receive energy from the inductor during at least one cycle of the regulation signal. The processing continues by scaling the regulation signal for the at least one cycle based on the voltage of the particular output to receive the energy, the voltage of the 1^st output and the supply voltage to the DC to DC converter when the particular output to receive the energy is not the 1^st output. In this manner, when the output receiving the energy is not the 1^st output (i.e., the directly regulated output), the regulation signal is scaled based on the desired duty cycle for the particular output.