An improved 48 V-to-1 V buck converter featuring transient response enhancement

This study introduces an enhanced buck converter topology with integrated transient enhancement capability (TE-DSD) designed for high-ratio voltage conversion from 48 V input to precisely regulated 1 V output. The proposed architecture employs a multi-phase switched-inductance configuration that ensures current balancing across interleaved channels during steady-state operation through synchronized switching control and optimized magnetic coupling. A key feature is the advanced transient enhancement mode. This mode dynamically modifies switching node voltages through adaptive gate drive sequencing. It achieves precisely controlled elevation of inductive excitation voltages during load transients. This strategic voltage elevation mechanism substantially improves current slew rates while maintaining converter stability boundaries. Experimental validation under 10A load step conditions confirms the topology’s transient performance advantages, demonstrating quantifiable improvements of 39.4% in output voltage deviation suppression and 33.3% reduction in transient recovery duration when compared with conventional dual-phase switched-inductance (DSD) converter configurations. The topology maintains output voltage adjustability across the 1 V operational range while preserving current-sharing characteristics essential for thermal management in high-current applications.