A Modified Dickson Charge Pump Circuit with High Efficiency and High Output Voltage

Duk-Hyung LEE  Daejeong KIM  Ho-Jun SONG  Kyeong-Sik MIN  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E91-C   No.2   pp.228-231
Publication Date: 2008/02/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e91-c.2.228
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electronic Circuits
Keyword: 
DC-DC converter,  charge pump circuit,  output voltage loss,  power efficiency,  pumping efficiency,  

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Summary: 
A power-efficient Dickson-based charge pump circuit is proposed and verified in this paper. Using a PMOS transfer switch in the new circuit solves the problem of the output voltage loss and its body control switch can suppress the parasitic bipolar action. Comparing this new one with the conventional circuit, the new circuit generates output voltage as high as 2.9 VDD while the conventional one only 2 VDD. For their efficiency values, the new circuit has better efficiency than the conventional one by as much as 14.5% with the area overhead of 12.2% using 3.5-µm and 40-V CMOS high-voltage process.