Year: 2025
Type: article
Abstract: In this brief we propose a novel ByPass (BP) circuit that overcomes the voltage regulation limit in the Ripple Based Constant On-Time (RB-COT) Buck converters due to intrinsic presence of a minimum achievable OFF time. The BP stage is conceived to be embedded in the RB-COT modulator located within the converter feedback loop, and only intervening when the minimum OFF time condition is reached. The latter implies that the COT modulator saturates, and consequently, the output voltage regulation of the converter is no longer guaranteed. Conversely, the BP stage does not affect the behavior of the circuit when it operates in normal regulating condition. The effectiveness of the proposed BP stage is confirmed through both transistor-level simulation results derived from the SPICE platform and experimental measurements on a integrated circuit prototype implemented in a 0.18 um Bipolar-CMOS-DMOS process.
Authors: Francesco Gabriele, Samuele Gisonno, Filippo Fiori, Davide Lena, Salvatore Rosario Musumeci, Fabio Pareschi, Gianluca Setti
Language: English
Topic: Advanced DC-DC Converters
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4408970638