Analysis and Design of a Time-Domain Current-Mode Buck Converter in Nanometer-Scale Technology

The continuous scaling of CMOS technology has enabled highly integrated and efficient power management solutions, where fast and accurate DC-DC conversion is a critical requirement. This thesis focuses on the design and analysis of a time-based current-mode buck converter. The proposed approach exploits time-domain processing, replacing traditional voltage-domain control with delay-based techniques, in order to enhance speed, efficiency and scalability. A comprehensive analysis is presented to model the behavior of the converter, supported by MATLAB/Simulink simulations and Verilog-A behavioral modeling. Special attention is given to the current loop implementation, including overcurrent protection mechanisms and the effect of parasitic components on stability and performance. The results demonstrate that the time-based control improves transient response while maintaining high efficiency at multi-megahertz switching frequencies. Compared to conventional approaches, the proposed design offers better scalability with technology nodes and provides a promising solution for next-generation integrated power converters.