TY - GEN
T1 - A Hybrid Always-Dual-Path Recursive Step-Down Converter Using Adaptive Switching Level Control Achieving 95.4% Efficiency with 288mΩ Large-DCR Inductor
AU - Jung, Woojoong
AU - Kim, Minsu
AU - Park, Hyunjun
AU - Yoo, Sungmin
AU - Kong, Tae Hwang
AU - Yang, Jun Hyeok
AU - Choi, Michael
AU - Shin, Jongshin
AU - Lee, Hyung Min
N1 - Funding Information:
This work was supported by Samsung Electronics, Korea
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Supply voltages of mobile systems have been gradually scaled down, requiring step-down converters with a low voltage conversion ratio (VCR) that can convert a Li-ion battery voltage of 2.8-4.2V to a lower supply voltage around 1V [1]-[4]. Also, the sizes of mobile device are getting smaller, limiting the volume of output components, especially inductors. Smaller-volume inductors suffer from larger DC resistance (DCR), increasing conduction power loss. To address these issues, hybrid topologies, which transfer load currents through both inductor and capacitor in parallel to reduce DCR losses, have been proposed [5], but more aggressive techniques to further improve efficiencies are required. The proposed converter not only reduces the inductor current, $I_{L}$, with an always-dual-path topology, but also minimizes $\Delta I_{L}$ using recursive switching level control that can reduce the switching voltage difference across the inductor in a build-up phase.
AB - Supply voltages of mobile systems have been gradually scaled down, requiring step-down converters with a low voltage conversion ratio (VCR) that can convert a Li-ion battery voltage of 2.8-4.2V to a lower supply voltage around 1V [1]-[4]. Also, the sizes of mobile device are getting smaller, limiting the volume of output components, especially inductors. Smaller-volume inductors suffer from larger DC resistance (DCR), increasing conduction power loss. To address these issues, hybrid topologies, which transfer load currents through both inductor and capacitor in parallel to reduce DCR losses, have been proposed [5], but more aggressive techniques to further improve efficiencies are required. The proposed converter not only reduces the inductor current, $I_{L}$, with an always-dual-path topology, but also minimizes $\Delta I_{L}$ using recursive switching level control that can reduce the switching voltage difference across the inductor in a build-up phase.
UR - http://www.scopus.com/inward/record.url?scp=85130754690&partnerID=8YFLogxK
U2 - 10.1109/CICC53496.2022.9772867
DO - 10.1109/CICC53496.2022.9772867
M3 - Conference contribution
AN - SCOPUS:85130754690
T3 - Proceedings of the Custom Integrated Circuits Conference
BT - 2022 IEEE Custom Integrated Circuits Conference, CICC 2022 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 43rd Annual IEEE Custom Integrated Circuits Conference, CICC 2022
Y2 - 24 April 2022 through 27 April 2022
ER -