A Dynamically Reconfigurable Recursive Switched-Capacitor DC-DC Converter with Adaptive Load Ability Enhancement

Qi Lu1; Shuangmu Li1; Bo Zhao2; Junmin Jiang3; Zhiyuan Chen4; Sijun Du1

2023

10.1109/TPEL.2023.3235305

IEEE Transactions on Power Electronics   Impact Factor & Quartile

1941-0107

1941-0107

Multiple voltage conversion ratio (VCR) recursive switched-capacitor (SC) dc-dc converters, based on several basic 2:1 converters, are widely used for on-chip power supplies due to their flexible VCRs for higher energy efficiency. However, conventional multiple VCR SC converters usually have one or more 2:1 converters unused for some VCRs, which results in lower power density and chip area wastage. This article presents a new recursive dc-dc converter system, which can dynamically reconfigure the connection of all on-chip 2:1 converter cells so that the unused converters in the conventional designs can be reused in this new architecture for increasing the load-driving capacity, power density, and power efficiency. To validate the design, a 4-bit-input 15-ratio system was designed and fabricated in a 180-nm BCD process, which can support a maximum load current of \text{0.71}\,\text{mA} and achieves a peak power efficiency of 93.1% with 105.3\,\mu \text{A/mm} {2} chip power density from a 2-V input power supply. The measurement results show that the load-driving capacity can become 6.826×, 2.236×, and 2.175× larger than the conventional topology when the VCR is 1/2, 1/4, and 3/4, respectively. In addition, the power efficiency under these specific VCRs can also be improved considerably.

DC-DC converters switched-capacitor recursive switched capacitor (RSC) fully integrated multiple voltage conversion ratios (VCRs)

English

Others

2-s2.0-85147224295

IEEE

1.Department of Microelectronics, Delft University of Technology, Delft, The Netherlands
2.Institute of VLSI Design, Zhejiang University, Hangzhou, China
3.Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
4.State Key Laboratory of ASIC and System, Fudan University, Shanghai, China

Qi Lu,Shuangmu Li,Bo Zhao,et al. A Dynamically Reconfigurable Recursive Switched-Capacitor DC-DC Converter with Adaptive Load Ability Enhancement[J]. IEEE Transactions on Power Electronics,2023,PP(99):1-9.

Qi Lu,Shuangmu Li,Bo Zhao,Junmin Jiang,Zhiyuan Chen,&Sijun Du.(2023).A Dynamically Reconfigurable Recursive Switched-Capacitor DC-DC Converter with Adaptive Load Ability Enhancement.IEEE Transactions on Power Electronics,PP(99),1-9.

Qi Lu,et al."A Dynamically Reconfigurable Recursive Switched-Capacitor DC-DC Converter with Adaptive Load Ability Enhancement".IEEE Transactions on Power Electronics PP.99(2023):1-9.