Yeah PPS uses capacitive halvers. You can e.g. stack two half bridges, connect their switching nodes with a flying capacitor, and declare the connection of the

Yeah PPS uses capacitive halvers. You can e.g. stack two half bridges, connect their switching nodes with a flying capacitor, and declare the connection of the stack the new switching node. If you use a series induction from the switching node to the load, that's a "3L FC buck". The inductor is not needed for halving.