Fully Integrated Low-Ripple Switched-Capacitor DC–DC Converter with Parallel Low-Dropout Regulator
In this paper, we propose a fully integrated switched-capacitor DC–DC converter with low ripple and fast transient response for portable low-power electronic devices. The proposed converter reduces the output ripple by filtering the control ripple via combining a low-dropout regulator with...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-01-01
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| Series: | Electronics |
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| Online Access: | http://www.mdpi.com/2079-9292/8/1/98 |
| _version_ | 1798040849017208832 |
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| author | Jeong-Yun Lee Gwang-Sub Kim Kwang-Il Oh Donghyun Baek |
| author_facet | Jeong-Yun Lee Gwang-Sub Kim Kwang-Il Oh Donghyun Baek |
| author_sort | Jeong-Yun Lee |
| collection | DOAJ |
| description | In this paper, we propose a fully integrated switched-capacitor DC–DC converter with low ripple and fast transient response for portable low-power electronic devices. The proposed converter reduces the output ripple by filtering the control ripple via combining a low-dropout regulator with a main switched-capacitor DC–DC converter with a four-bit digital capacitance modulation control. In addition, the four-phase interleaved technique applied to the main converter reduces the switching ripple. The proposed converter provides an output voltage ranging from 1.2 to 1.5 V from a 3.3 V supply. Its peak efficiency reaches 73% with ripple voltages below 55 mV over the entire output power range. The transient response time for a load current variation from 100 μA to 50 mA is measured to be 800 ns. Importantly, the converter chip, which is fabricated using 0.13 μm complementary metal–oxide–semiconductor (CMOS) technology, has a size of 2.04 mm2. We believe that our approach can contribute to advancements in power sources for applications such as wearable electronics and the Internet of Things. |
| first_indexed | 2024-04-11T22:13:20Z |
| format | Article |
| id | doaj.art-17696a11d07f487f9365beda21c0a8a0 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-04-11T22:13:20Z |
| publishDate | 2019-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-17696a11d07f487f9365beda21c0a8a02022-12-22T04:00:30ZengMDPI AGElectronics2079-92922019-01-01819810.3390/electronics8010098electronics8010098Fully Integrated Low-Ripple Switched-Capacitor DC–DC Converter with Parallel Low-Dropout RegulatorJeong-Yun Lee0Gwang-Sub Kim1Kwang-Il Oh2Donghyun Baek3Microwave Embedded Circuit and System Laboratory, School of Electrical Engineering, Chung-Ang University, Seoul 06974, KoreaMicrowave Embedded Circuit and System Laboratory, School of Electrical Engineering, Chung-Ang University, Seoul 06974, KoreaMicrowave Embedded Circuit and System Laboratory, School of Electrical Engineering, Chung-Ang University, Seoul 06974, KoreaMicrowave Embedded Circuit and System Laboratory, School of Electrical Engineering, Chung-Ang University, Seoul 06974, KoreaIn this paper, we propose a fully integrated switched-capacitor DC–DC converter with low ripple and fast transient response for portable low-power electronic devices. The proposed converter reduces the output ripple by filtering the control ripple via combining a low-dropout regulator with a main switched-capacitor DC–DC converter with a four-bit digital capacitance modulation control. In addition, the four-phase interleaved technique applied to the main converter reduces the switching ripple. The proposed converter provides an output voltage ranging from 1.2 to 1.5 V from a 3.3 V supply. Its peak efficiency reaches 73% with ripple voltages below 55 mV over the entire output power range. The transient response time for a load current variation from 100 μA to 50 mA is measured to be 800 ns. Importantly, the converter chip, which is fabricated using 0.13 μm complementary metal–oxide–semiconductor (CMOS) technology, has a size of 2.04 mm2. We believe that our approach can contribute to advancements in power sources for applications such as wearable electronics and the Internet of Things.http://www.mdpi.com/2079-9292/8/1/98DC–DC converterswitched capacitorpower management integrated circuitCMOS technology |
| spellingShingle | Jeong-Yun Lee Gwang-Sub Kim Kwang-Il Oh Donghyun Baek Fully Integrated Low-Ripple Switched-Capacitor DC–DC Converter with Parallel Low-Dropout Regulator Electronics DC–DC converter switched capacitor power management integrated circuit CMOS technology |
| title | Fully Integrated Low-Ripple Switched-Capacitor DC–DC Converter with Parallel Low-Dropout Regulator |
| title_full | Fully Integrated Low-Ripple Switched-Capacitor DC–DC Converter with Parallel Low-Dropout Regulator |
| title_fullStr | Fully Integrated Low-Ripple Switched-Capacitor DC–DC Converter with Parallel Low-Dropout Regulator |
| title_full_unstemmed | Fully Integrated Low-Ripple Switched-Capacitor DC–DC Converter with Parallel Low-Dropout Regulator |
| title_short | Fully Integrated Low-Ripple Switched-Capacitor DC–DC Converter with Parallel Low-Dropout Regulator |
| title_sort | fully integrated low ripple switched capacitor dc dc converter with parallel low dropout regulator |
| topic | DC–DC converter switched capacitor power management integrated circuit CMOS technology |
| url | http://www.mdpi.com/2079-9292/8/1/98 |
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