I MHz self-driven DC-DC converter for nonisolated 12 V VRs

In conventional high frequency 12 V VRM, large gate driver loss and body diode conduction loss raise crucial challenges to its gate driver implementation. The proposed self-driven topologies are basically buck-derived multiphase interleaving soft switching topologies, which eliminate the synchronous rectifier MOSFET drivers and save driving loss and body diode loss, so that it is a high efficiency, high power density solution for future microprocessors. A 1U 4-phase 1.3 V/100 A VRM running at 1 MHz demonstrates its advantages (cost, size and efficiency) over the conventional multiphase buck converter.