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8.4 Fully Integrated Buck Converter with 78% Efficiency at 365mW Output Power Enabled by Switched-Inductor Capacitor Topology and Inductor Current Reduction Technique

https://doi.org/10.1109/ISSCC.2019.8662530

Tang, Nghia; Nguyen, Bai; Tang, Yangyang; Hong, Wookpyo; Zhou, Zhiyuan; Heo, Deukhyoun (February 2019, 2019 IEEE International Solid- State Circuits Conference - (ISSCC))

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A Sub-1V Analog-Assisted Inverter-Based Digital Low-Dropout Regulator with a Fast Response Time at 25mA/100ps and 99.4% Current Efficiency

https://doi.org/10.1109/CICC.2019.8780173

Nguyen, Bai; Tang, Nghia; Zhou, Zhiyuan; Hong, Wookpyo; Heo, Deukhyoun; Tang, Yangyang; Zhang, Philipp (April 2019, 2019 IEEE Custom Integrated Circuits Conference (CICC))

To mitigate large voltage droop caused by sub-ns dynamic current transitions in system on chips (SoCs), this paper proposes a fully integrated analog-assisted inverter-based digital low dropout regulator (LDO) to obtain a fast response time with 160mV droop at 25mA/100ps featuring 99.4% current efficiency, and 16mV DC load regulation in sub-1V operating range by using a dynamic-step quantizer and a trip-point controller. The proposed quantizer is implemented with an inverter-based flash ADC to achieve high speed without consuming large power while the trip-point controller corrects the DC error of the inverter-based ADC. Besides, the assistant analog LDO is employed to provide fine-grain regulation and remove ripple from the output voltage.
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Analog-Assisted Digital Capacitorless Low-Dropout Regulator Supporting Wide Load Range

https://doi.org/10.1109/TIE.2018.2840492

Tang, Nghia; Tang, Yangyang; Zhou, Zhiyuan; Nguyen, Bai; Hong, Wookpyo; Zhang, Philipp; Kim, Jong-Hoon; Heo, Deukhyoun (March 2019, IEEE Transactions on Industrial Electronics)

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