Triple-Mode Switched-Inductor-Capacitor DC-DC Buck Converter with Reusable Flying Capacitor and Bang-Bang Zero-Current Detector for Wide Load Current Range
Although the capacity of a battery with a small form factor is extremely low, demand for long usage time of Internet of Things (IoT) products is increasing. Owing to this limitation of the battery, power management integrated circuits (PMICs) are used for extending the battery usage time with high e...
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2020-07-01
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doaj-63cd265c66f74c1ba65dabc9270001662020-11-25T03:28:36ZengMDPI AGElectronics2079-92922020-07-0191202120210.3390/electronics9081202Triple-Mode Switched-Inductor-Capacitor DC-DC Buck Converter with Reusable Flying Capacitor and Bang-Bang Zero-Current Detector for Wide Load Current RangeJongbeom Baek0Hyung-Min Lee1Se-Un Shin2School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, KoreaSchool of Electrical Engineering, Korea University, Seoul 02841, KoreaSchool of Electronics and Electrical Engineering, Dankook University, Yongin 16890, KoreaAlthough the capacity of a battery with a small form factor is extremely low, demand for long usage time of Internet of Things (IoT) products is increasing. Owing to this limitation of the battery, power management integrated circuits (PMICs) are used for extending the battery usage time with high efficiency. In particular, since IoT devices are mostly in the sleep mode in the idle state, PMICs should achieve high efficiency for ultralight loads in the sleep mode as well as for heavy loads in the active mode. In this paper, an accurate bang-bang zero-current detector (to prevent a reverse inductor current) and a triple-mode switched inductor-capacitor dc-dc buck converter with a reusable flying capacitor are presented; these techniques can maintain high efficiency over a wide load current range. The proposed buck converter was fabricated in a 0.18-μm 1P4M CMOS process. A power conversion efficiency exceeding 85% was achieved in the load range of 100 µA to 300 mA.https://www.mdpi.com/2079-9292/9/8/1202buck converterdiscontinuous conduction modeflying capacitorpower management integrated circuitszero-current detector |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jongbeom Baek Hyung-Min Lee Se-Un Shin |
spellingShingle |
Jongbeom Baek Hyung-Min Lee Se-Un Shin Triple-Mode Switched-Inductor-Capacitor DC-DC Buck Converter with Reusable Flying Capacitor and Bang-Bang Zero-Current Detector for Wide Load Current Range Electronics buck converter discontinuous conduction mode flying capacitor power management integrated circuits zero-current detector |
author_facet |
Jongbeom Baek Hyung-Min Lee Se-Un Shin |
author_sort |
Jongbeom Baek |
title |
Triple-Mode Switched-Inductor-Capacitor DC-DC Buck Converter with Reusable Flying Capacitor and Bang-Bang Zero-Current Detector for Wide Load Current Range |
title_short |
Triple-Mode Switched-Inductor-Capacitor DC-DC Buck Converter with Reusable Flying Capacitor and Bang-Bang Zero-Current Detector for Wide Load Current Range |
title_full |
Triple-Mode Switched-Inductor-Capacitor DC-DC Buck Converter with Reusable Flying Capacitor and Bang-Bang Zero-Current Detector for Wide Load Current Range |
title_fullStr |
Triple-Mode Switched-Inductor-Capacitor DC-DC Buck Converter with Reusable Flying Capacitor and Bang-Bang Zero-Current Detector for Wide Load Current Range |
title_full_unstemmed |
Triple-Mode Switched-Inductor-Capacitor DC-DC Buck Converter with Reusable Flying Capacitor and Bang-Bang Zero-Current Detector for Wide Load Current Range |
title_sort |
triple-mode switched-inductor-capacitor dc-dc buck converter with reusable flying capacitor and bang-bang zero-current detector for wide load current range |
publisher |
MDPI AG |
series |
Electronics |
issn |
2079-9292 |
publishDate |
2020-07-01 |
description |
Although the capacity of a battery with a small form factor is extremely low, demand for long usage time of Internet of Things (IoT) products is increasing. Owing to this limitation of the battery, power management integrated circuits (PMICs) are used for extending the battery usage time with high efficiency. In particular, since IoT devices are mostly in the sleep mode in the idle state, PMICs should achieve high efficiency for ultralight loads in the sleep mode as well as for heavy loads in the active mode. In this paper, an accurate bang-bang zero-current detector (to prevent a reverse inductor current) and a triple-mode switched inductor-capacitor dc-dc buck converter with a reusable flying capacitor are presented; these techniques can maintain high efficiency over a wide load current range. The proposed buck converter was fabricated in a 0.18-μm 1P4M CMOS process. A power conversion efficiency exceeding 85% was achieved in the load range of 100 µA to 300 mA. |
topic |
buck converter discontinuous conduction mode flying capacitor power management integrated circuits zero-current detector |
url |
https://www.mdpi.com/2079-9292/9/8/1202 |
work_keys_str_mv |
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