Analysis of Hybrid Dual-Path Step-Down Topology for High-Frequency, Integrated Dc-Dc Converters

This paper investigates the hybrid dual-path stepdown (DPSD) dc-dc converter, highlighting the characteristics that make it an attractive alternative to a standard buck converter when a high level of integration and high-frequency operation are both demanded. In particular, the DPSD topology is explored here considering a high frequency (10 to 20 MHz) medium power (1 to 3W) radar automotive application. Moreover, the voltage conversion ratio of the topology is analyzed, pointing out its dependence on power switches' channel resistances and passive components' parasitic resistances through an accurate closedform expression. Finally, the analytical model developed for this topology is verified through simulations, where power switches are implemented with active devices from a standard CMOS process.