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1. An Inductor-First Single-Inductor Multiple-Output Hybrid DC-DC Converter With Integrated Flying Capacitor for SoC Applications

   https://doi.org/10.1109/TCSI.2022.3198389  

   Zhou, Zhiyuan; Tang, Nghia; Nguyen Bai; Hong Wookpyo Hong; Pande, Partha Pratim; Heo, Deukhyoun Heo (December 2022, IEEE transactions on circuits and systems)

   With the increasing complexity of highly integrated system on chips (SoCs), the power management system (PMS) is required to provide several power supplies efficiently for individual blocks. This paper presents a single-inductor multiple outputs (SIMO) an inductor-first hybrid converter that generates three outputs between 0.4V and 1.6V from a 1.8V input. The proposed multiple-output hybrid power stage can improve the conversion efficiency by reducing inductor current while extending the output voltage range compared with the existing hybrid topologies. In addition, the proposed converter employs an on-chip switched-capacitor power stage (SCPS) with a dual switching frequency technique, resulting in a fast response time, low cross-regulation, and reduced number of on-chip pads. Measurement results show that the converter achieves a peak efficiency of 87.5% with a maximum output current of 450mA. The converter is integrated with a fast voltage regulation loop with a 500MHz system clock to achieve less than 0.01mA/mV cross-regulation and a maximum 20mV overshoot at full-load transient response. The design is fabricated in the standard 180nm CMOS technology 

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2. Tunable Microwave Inductor Using Liquid-Metal Microfluidics

   https://doi.org/10.1109/WMCS52222.2021.9493288  

   Watson, Alexander M.; Leary, Thomas F.; Itokazu, Jonathan; Mattamana, Aji G.; Quach, Tony; Ohta, Aaron T.; Shiroma, Wayne A.; Tabor, Christopher E. (May 2021, 2021 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS))
3. Demystifying Capacitor Voltages and Inductor Currents in Hybrid Converters

   https://doi.org/10.1109/COMPEL.2019.8769722  

   Das, Ratul; Celikovic, Janko; Abedinpour, Siamak; Mercer, Mark; Maksimovic, Dragan; Le, Hanh-Phuc (June 2019, 2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL))

   This paper presents a modeling method to accurately predict DC and ripple values of flying capacitor voltages and inductor currents in hybrid converters by recognizing a key relationship between median and average values of these state variables. The method is demonstrated for the Dual-Phase Multi-Inductor Hybrid (DP-MIH) converter and 3-Level Buck converter. Analytical details and intuitive explanations are presented for the well-known balancing problem of flying capacitor voltages and inductor current fluctuations in hybrid converters. Simulation results for the converters at different operating conditions are provided to verify the method and analytical results. 

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4. Synchronous Inductor Switched Energy Extraction Circuits for Triboelectric Nanogenerator

   https://doi.org/10.1109/ACCESS.2021.3082499  

   Pathak, Madhav; Kumar, Ratnesh (January 2021, IEEE Access)
5. Asymmetric Wireless Power Transfer with a Flexible Contact Lens Inductor

   https://doi.org/10.1109/PowerMEMS56853.2022.10007576  

   Mahmud, Khandaker Reaz; Bulbul, Ashrafuzzaman; Noh, Seungbeom; Mastrangelo, Carlos; Kim, Hanseup (December 2022, 2022 21st International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS))

   This paper reports the microfabrication of a Galinstan-based flexible coil on a contact lens and its preliminary use for wireless power transfer onto a smart contact lens. The Galinstan-based coil provides accommodation against physical deformation of a contact lens by maintaining electrical conductivity under strains due to its semi-fluidic nature. The fabricated Galinstan-coils successfully demonstrated post-deformation tolerance up to 166.67% strain. The fabricated contact lens prototype with a Galinstan-coil showed the maximum wireless power reception of 32.4 μW with a power efficiency of 0.75% from an external coil located 5 mm away within a frame of eyeglasses. 

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