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A Design of Interleaved DC-DC Buck-boost Converter with Improved Conduction Loss of Switch  

Lee, Joo-Young (Department of Electronics Engineering, Seokyeung University)
Joo, Hwan-Kyu (Electronics and Electrical Engineering, Dankook University)
Lee, Hyun-Duck (Department of Electronics Engineering, Seokyeung University)
Yang, Yil-Suk (Electronics and Telecommunic ations Research Institute)
Koo, Yong-Seo (Electronics and Electrical Engineering, Dankook University)
Publication Information
Journal of IKEEE / v.14, no.3, 2010 , pp. 250-255 More about this Journal
Abstract
The interleaved power management IC(PMIC) with DTMOS(Dynamic Threshold voltage MOSFET) switching device is proposed in this paper. The buck-boost converter used to provide the high output voltage and low output voltage for portable applications. Also we used the PWM(Pulse Width Modulation) control method for high power efficiency at high current level. DTMOS with low on-resistance is designed to decrease conduction loss. The interleaved PMIC to reduce output ripple. And step-down DC-DC converter in stand-by mode below 1mA is designed with LDO in order to achive high efficiency.
Keywords
DC-DC converter; PWM; DTMOS; Interleave;
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