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http://dx.doi.org/10.7471/ikeee.2011.15.4.319

Synchronous Buck Converter with High Efficiency and Low Ripple Voltage for Mobile Applications  

Yim, Chang-Jong (School of Electronic and Electrical Engineering, Dankook University)
Kim, Jun-Sik (School of Electronic and Electrical Engineering, Dankook University)
Park, Shi-Hong (School of Electronic and Electrical Engineering, Dankook University)
Publication Information
Journal of IKEEE / v.15, no.4, 2011 , pp. 319-323 More about this Journal
Abstract
In this paper presents a new model of dual-mode synchronous buck converter with dynamic control for mobile applications was proposed. The proposed circuit can operate at 2.5MHz with supply voltage 2.5V to 5V for low ripple and minimum inductor and capacitor size, which is suitable for single-cell lithium-ion battery supply mobile applications. For high efficiency, the proposed circuit adopts synchronous type and dynamic control. The proposed circuit is designed by using the device parameter of TSMC 0.18um BCD process and the performance is evaluated by Cadence spectre. Experimental board level results show the maximum conversion efficiency is 96% at 100mA load current.
Keywords
Synchronous buck converter; PFM; PWM; Low Ripple; High Efficiency;
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