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Integrated Current Sensing Technique Suitable for Step-Down Switch-Mode Power Converters

Xiaojuan XIA, Liang XIE, Weifeng SUN, Longxing SHI

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Summary :

A new on-chip current sensing circuit suitable for step-down switch-mode power converters (SMPC) is presented in this paper. It can be used in a high speed SMPC. The sense voltage is quite accurate and temperature independent. The structure is very simple. Only eight transistors and a sensing resistor are used. This current sensing technique has been fabricated with a standard 0.5 µm DPDM CMOS process. Experimental results show that the proposed circuit can work well in DC-DC converters such that the loading current can be managed through control theories.

Publication
IEICE TRANSACTIONS on Electronics Vol.E92-C No.10 pp.1299-1303
Publication Date
2009/10/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E92.C.1299
Type of Manuscript
PAPER
Category
Electronic Circuits

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