Abstract
This paper proposes a fully integrated dual-output continuously scalable-conversion-ratio (CSCR) switched-capacitor (SC) converter that increases the overall power conversion efficiency (PCE) beyond that of the conventional dual-output SC converters. The structure employs proposed dual-output CSCR SC stage and channel SC stage to transfer charges to two output load voltages (VOUTs) with high PCE. Also, the converter is controlled by analog switching frequency modulation (ASFM) and digital flying capacitance modulation (DFCM) loops to regulate both VOUTs simultaneously. The proposed converter is fabricated using a 180 nm CMOS process, and regulates VOUT of 1.1-1.6 V and 0.55-0.95 V with an input voltage of 1.5-1.9 V. In measurement, the proposed converter achieves a maximum PCE of 85%, and an average PCE of 78.6% for the available VOUT ranges. Moreover, the converter exhibits the maximum IOUTs of 21 mA and 4 mA, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 3463-3475 |
| Number of pages | 13 |
| Journal | IEEE Transactions on Circuits and Systems I: Regular Papers |
| Volume | 71 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2024 |
Bibliographical note
Publisher Copyright:© 2024 IEEE.
Keywords
- Continuously scalable-conversion-ratio
- Internet of Things (IoT)
- dc-dc converter
- dual-output switched capacitor converter
- system on chip (SoC) design
ASJC Scopus subject areas
- Hardware and Architecture
- Electrical and Electronic Engineering