A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor†
AbstractThis 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. View Full-Text
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Kudva, S.; Chaubey, S.; Harjani, R. A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor. J. Low Power Electron. Appl. 2016, 6, 18.
Kudva S, Chaubey S, Harjani R. A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor. Journal of Low Power Electronics and Applications. 2016; 6(3):18.Chicago/Turabian Style
Kudva, Sudhir; Chaubey, Saurabh; Harjani, Ramesh. 2016. "A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor." J. Low Power Electron. Appl. 6, no. 3: 18.