A fully integrated, wide-load-range, high-power-conversion-efficiency switched capacitor DC–DC converter with adaptive bias comparator for ultra-low-power power management integrated circuit

Hiroki Asano, Tetsuya Hirose, Yuta Kojima, Nobutaka Kuroki, Masahiro Numa
2018 Japanese Journal of Applied Physics  
DCM, FSM, dead time and width controllers for a high frequency high efficiency buck DC-DC converter over a wide load range Pi Changming, Yan Wei, Zhang Ke et al. -Ultralow-quiescent-current and wide-loadrange low-dropout linear regulator with self-biasing technique for micropower battery management Toshihiro Ozaki, Tetsuya Hirose, Hiroki Asano et al. -This content was downloaded from IP address 207.241.231.83 on 26/07/2018 at 22:09 A fully integrated, wide-load-range,
more » ... wer-conversion-efficiency switched capacitor DC-DC converter with adaptive bias comparator for ultra-low-power power management integrated circuit In this paper, we present a wide-load-range switched-capacitor DC-DC buck converter with an adaptive bias comparator for ultra-low-power power management integrated circuit. The proposed converter is based on a conventional one and modified to operate in a wide load range by developing a load current monitor used in an adaptive bias comparator. Measurement results demonstrated that our proposed converter generates a 1.0 V output voltage from a 3.0 V input voltage at a load of up to 100 µA, which is 20 times higher than that of the conventional one. The power conversion efficiency was higher than 60% in the load range from 0.8 to 100 µA.
doi:10.7567/jjap.57.04ff03 fatcat:l3t4jslzxzbstfch73sy5guboa