A fast and high efficiency buck converter with Switch-On-Demand Modulator for wide load range applications

IEICE Electronics Express

Chung-Hsun Huang¹  Chao-Chun Chen¹ 

[1] Institute of Electrical Engineering, National Chung Cheng University

关键词: buck converter;    fast transient;    wide load range;   

DOI  :  10.1587/elex.8.963

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(5)Cited-By(2)This paper presents a buck converter with a switch-on-demand modulator (SOM) for achieving a fast transient response, small voltage ripple, and high power efficiency over a wide load range. Switching power MOS on or off depending on the energy demand of the load circuit results in a hybrid operation of pulse width modulation (PWM) and pulse frequency modulation (PFM). The proposed buck converter uses 90nm CMOS process and can achieve a transient response time of less than 2µs and a voltage ripple of 18mV at a load current range of 10mA∼500mA with a power efficiency above 88%.

【 授权许可】

Unknown