Multi-MHZ Output Stage Design for Integrated DC-DC Converters
Author | : Marian Chi-yu Chang |
Publisher | : |
Total Pages | : 152 |
Release | : 2008 |
ISBN-10 | : 0494720506 |
ISBN-13 | : 9780494720509 |
Rating | : 4/5 (509 Downloads) |
Download or read book Multi-MHZ Output Stage Design for Integrated DC-DC Converters written by Marian Chi-yu Chang and published by . This book was released on 2008 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: To support the increasing functions of mobile devices, small-footprint and high-performance power conversion is required. In this thesis, a segmented output stage for the implementation of integrated DC-DC converters that operate at the multi-MHz range is explored. The output stage consists of two major parts, the output power transistors and their respective gate-drivers. A new FOM is developed for the design and selection of CMOS-based power MOSFETs, and an optimization method is formulated to size the gate-drivers. Both approaches strive to minimize the power consumption of the output stage, and have been verified via simulation. In addition, the output stage employs a segmentation scheme to increase the converter efficiency at the light-load conditions. The output stage has been fabricated with the 5V-option of TSMC's 0.25mum standard CMOS technology. The maximum power conversion efficiencies measured experimentally at switching frequency 6.25MHz and 10MHz are 85% and 82%, respectively.