A floating voltage driver circuit was designed for fully integrated switched capacitor power converter (SCPC). The interleaved bootstrap control technique was used, which periodically utilized certain cells in the multiphase interleaved SCPC to provide bootstrap drive for other cells. The floating voltage drive for all power switches was implemented and was suitable for all SCPC topologies. Compared with the traditional scheme, the hardware overhead of the proposed floating voltage driving circuit was independent with the number of devices in the SCPC. It was applied in an 8-phase reconfigurable SCPC, and the simulation results proved the correctness of this design.