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 1st 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 1st output and the supply voltage to
the DC to DC converter when the particular output to receive the energy is not
the 1st output. In this manner, when the output receiving the energy
is not the 1st output (i.e., the directly regulated output), the regulation
signal is scaled based on the desired duty cycle for the particular output.