Title :
Optimal design to maximize efficiency of single-inductor multiple-output buck converters in discontinuous conduction mode for IoT applications
Author :
Yamauchi, Yoshitaka ; Yanagihara, Yuki ; Fuketa, Hiroshi ; Sakurai, Takayasu ; Takamiya, Makoto
Author_Institution :
Univ. of Tokyo, Tokyo, Japan
Abstract :
To clarify the design guide of single-inductor multiple-output (SIMO) buck converters in discontinuous conduction mode (DCM) targeted for small-size and low-power IoT applications, equations of optimal design parameters (transistor size, inductance, and switching frequency) to maximize the power conversion efficiency are derived for the first time. The analytical optimal designs are verified with SPICE simulations. The maximum efficiency of SIMO DCM buck converters is lower than that of conventional single-inductor single-output (SISO) DCM buck converters, because the power loss due to the energy distribution switches is added. The efficiency degradation is analytically explained for the first time.
Keywords :
Internet of Things; circuit optimisation; switching convertors; transistor circuits; Internet of Things; IoT applications; SIMO DCM buck converters; SISO DCM buck converters; SPICE simulations; discontinuous conduction mode; energy distribution switches; power conversion efficiency; power loss; single-inductor multiple-output buck converters; single-inductor single-output DCM buck converters; switching frequency; transistor size; Inductors; Logic gates; Manganese; Mathematical model; Optimized production technology; Power conversion; SPICE; buck converter; discontinuous conduction mode; single-inductor multiple-output;
Conference_Titel :
IC Design & Technology (ICICDT), 2015 International Conference on
Conference_Location :
Leuven
DOI :
10.1109/ICICDT.2015.7165905
