A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor
This work presents a fully integrated hybrid inductive/capacitive converter maintaining high efficiency for a load range of 2 mA to 140 mA (70×) suitable for the dynamic voltage scaling (DVS) based loads. This high efficiency is achieved by using an inductive converter for higher loads (15–140 mA, 0...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-09-01
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| Series: | Journal of Low Power Electronics and Applications |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2079-9268/6/3/18 |
| _version_ | 1811304040927068160 |
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| author | Sudhir Kudva Saurabh Chaubey Ramesh Harjani |
| author_facet | Sudhir Kudva Saurabh Chaubey Ramesh Harjani |
| author_sort | Sudhir Kudva |
| collection | DOAJ |
| description | This work presents a fully integrated hybrid inductive/capacitive converter maintaining high efficiency for a load range of 2 mA to 140 mA (70×) suitable for the dynamic voltage scaling (DVS) based loads. This high efficiency is achieved by using an inductive converter for higher loads (15–140 mA, 0.50–0.9 V) and a capacitive converter for lighter loads (2–5 mA, 0.40–0.55 V) with a 50 mV hysteresis margin. A digital state machine activates the appropriate converter based on the power efficiency and enables the converter hand-over. The functional feasibility of implementing digital circuits as representative loads under the inductor is shown thereby increasing the peak converter power density from 0.387 W/mm2 to 4.1 W/mm2 with only a minor hit on the efficiency. The maximum measured efficiency is achieved in inductive mode of operation and decreases from 76.4% to 71% when digital circuits are present under the inductor. The design was fabricated in IBM’s 32 nm SOI technology. |
| first_indexed | 2024-04-13T07:58:48Z |
| format | Article |
| id | doaj.art-2cb83925116d4293adc313ba594b41d2 |
| institution | Directory Open Access Journal |
| issn | 2079-9268 |
| language | English |
| last_indexed | 2024-04-13T07:58:48Z |
| publishDate | 2016-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Low Power Electronics and Applications |
| spelling | doaj.art-2cb83925116d4293adc313ba594b41d22022-12-22T02:55:19ZengMDPI AGJournal of Low Power Electronics and Applications2079-92682016-09-01631810.3390/jlpea6030018jlpea6030018A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under InductorSudhir Kudva0Saurabh Chaubey1Ramesh Harjani2Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USADepartment of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USADepartment of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USAThis work presents a fully integrated hybrid inductive/capacitive converter maintaining high efficiency for a load range of 2 mA to 140 mA (70×) suitable for the dynamic voltage scaling (DVS) based loads. This high efficiency is achieved by using an inductive converter for higher loads (15–140 mA, 0.50–0.9 V) and a capacitive converter for lighter loads (2–5 mA, 0.40–0.55 V) with a 50 mV hysteresis margin. A digital state machine activates the appropriate converter based on the power efficiency and enables the converter hand-over. The functional feasibility of implementing digital circuits as representative loads under the inductor is shown thereby increasing the peak converter power density from 0.387 W/mm2 to 4.1 W/mm2 with only a minor hit on the efficiency. The maximum measured efficiency is achieved in inductive mode of operation and decreases from 76.4% to 71% when digital circuits are present under the inductor. The design was fabricated in IBM’s 32 nm SOI technology.http://www.mdpi.com/2079-9268/6/3/18hybrid converterdynamic voltage scalingfully-integrated DC-DC converterdigital under inductorcapacitive converterinductive converter |
| spellingShingle | Sudhir Kudva Saurabh Chaubey Ramesh Harjani A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor Journal of Low Power Electronics and Applications hybrid converter dynamic voltage scaling fully-integrated DC-DC converter digital under inductor capacitive converter inductive converter |
| title | A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor |
| title_full | A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor |
| title_fullStr | A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor |
| title_full_unstemmed | A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor |
| title_short | A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor |
| title_sort | 4 1 w mm2 hybrid inductive capacitive converter for 2 140 ma dvs load under inductor |
| topic | hybrid converter dynamic voltage scaling fully-integrated DC-DC converter digital under inductor capacitive converter inductive converter |
| url | http://www.mdpi.com/2079-9268/6/3/18 |
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