A method and apparatus are disclosed for single-inductor multiple-output
switching converter design. With the proposed freewheel switching
control, this converter operates in a pseudo-continuous conduction mode
(PCCM) and is capable of handling large load currents with a much smaller
current ripple and peak inductor current, while retaining low cross
regulation. It can also work in discontinuous conduction mode (DCM) for
high efficiency at light loads. This design can be applied to have single
or multiple outputs and for different types of DC-DC conversions.