A dual‐power‐path charge pump for solar‐energy harvesting. (6th June 2021)

• Record Type: Journal Article
• Authors: Mui, Tin Wai; Yang, Jianxin; Lin, Yajun; Zhou, Yong; Zheng, Yanqi; Guo, Jianping; Leung, Ka Nang
• Is Part Of: International journal of circuit theory and applications. Volume 49:Number 11(2021)
• Page Start: 3894
• Page End: 3907
• Publication Date: 2021-06-06
• Subjects: charge pump -- dc‐dc power conversion -- energy harvesting; Electric circuit analysis -- Periodicals; 621.319205
• DOI: 10.1002/cta.3072
• Languages: English
• ISSNs: 0098-9886

Abstract

Abstract: A 5‐stage linear charge pump with dual power paths for solar‐energy harvesting, implemented in a standard CMOS 180‐nm technology, is proposed. The dual power paths are implemented by normal‐ V TH and low‐ V TH MOSFETs. The low‐ V TH MOSFET path reduces the minimum input voltage to 132.5 mV under no‐load condition, and another path formed by both low‐ V TH and normal‐ V TH MOSFETs achieves output current up to 11 mA at 0.3 V supply. With proposed arrangement of normal‐ V TH and low‐ V TH MOSFETs, reversion loss due to the leakage current of low‐ V TH MOSFETs in off‐state is minimized to achieve peak power‐conversion efficiency of 85%. Abstract : A 5‐stage linear charge pump with dual power paths for solar‐energy harvesting is proposed. The low‐ V TH MOSFET path reduces the minimum input voltage to 132.5 mV under no‐load condition, and another path formed by both low‐ V TH and normal‐ V TH MOSFETs achieves output current up to 11 mA at 0.3‐V supply. A peak power‐conversion efficiency of 85% is achieved.