A tri-mode high light-load efficiency BUCK converter for mobile phone application

IEICE Electronics Express

Cui Qing¹  Lin Fujiang¹ 

[1] Department of Electronic Science and University of Science and Technology of China

关键词: BUCK;    PSM;    wide output range;   

DOI  :  10.1587/elex.13.20160360

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(12)This paper proposes a wide output range and tri-mode BUCK circuit which utilizes PWM mode, PFM mode and PSM mode at heavy, light and very light loads respectively. By shutting down the majority of the internal modules, employing minimum loop control and reducing the quiescent current, the design could lower the static power consumption. The work, therefore, could increase efficiency at very light load. The proposed BUCK is fabricated using SMIC 0.18 µm process. Test results show that when the input is 4 V and the output is 1.8 V, the efficiency of the proposed BUCK is 90% and 85% at 300 mA and 5 mA load current respectively.

【 授权许可】

Unknown