Abstract
This article presents a fully integrated step-down switched-capacitor (SC) converter with nine voltage conversion ratios (VCRs) that regulates an output load voltage (VOUT) of 0.1-3.67 V with an input voltage of 2.5-5 V. The proposed converter employs 5-V metal-insulator-metal capacitors and 1.8-V native MOSFET capacitors to achieve both power density and conversion efficiency that are suitable for the Internet-of-Things (IoT) applications. In addition, the power stage is operated by the proposed overlapped-conversion-ratio modulation (OCRM), which prevents the severe closed-loop efficiency loss caused by conventional VCR control schemes. Thus, the proposed converter regulates VOUT through digitally controlled 15 nine-ratio SC cells, enabling the frequency-scalable power conversion operation. With a 180-nm CMOS process, the proposed converter achieves 87% peak efficiency and the maximum output power of 421 mW.
Original language | English |
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Pages (from-to) | 3444-3456 |
Number of pages | 13 |
Journal | IEEE Journal of Solid-State Circuits |
Volume | 59 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2024 |
Bibliographical note
Publisher Copyright:© 1966-2012 IEEE.
Keywords
- Conversion-ratio modulation (CRM)
- Internet of Things
- dc-dc converter
- reconfigurable converter
- switched-capacitor converter
- voltage conversion ratio (VCR)
ASJC Scopus subject areas
- Electrical and Electronic Engineering