/diy/ - Do It Yourself

>>1468647
>so we can have switchers on a chip, no external inductor?
You can get regulator modules with integrated inductors. Many look like ICs, except that they tend to be somewhat thicker. The prices can be pretty low (for non-chink stuff), but they often come in obnoxious packages like LGAs and QFNs with multiple bottom pads. They typically need external capacitors.
Research prototypes of fully integrated switchers exist. Last time I checked they ran at insane frequencies and had quite low efficiencies.