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1. A hybrid piezoelectric resonator-based DC-DC converter

   https://doi.org/10.1038/s41467-026-70494-0  

   Ko, Jae-Young; Liu, Wen-Chin B; Mercier, Patrick P (March 2026, Nature Communications)

   Abstract Piezoelectric resonators are becoming attractive alternatives to conventional magnetics in DC-DC converters due to their favorable scaling and manufacturing properties. However, the efficiency and current handling capabilities of baseline piezoelectric resonator-based DC-DC converters degrade at higher voltage conversion ratios due to charge utilization limitations imposed by topological operation. Here we present an Always-Multi-Path Embedded Flying Capacitor Piezoelectric Resonator-based DC-DC converter that uses flying capacitors to add both hybrid multi-path output power delivery features and to reduce the internal charge redistribution losses within the piezoelectric resonator. Specifically, the proposed integrated circuit modifies the optimal voltage conversion of the piezo network from 2:1 to 3:1 while adding a switched-capacitor output network that enables multi-path operation at all times, resulting in a net optimal voltage conversion ratio of 9:1 for the converter, with 4x improved output current. Fabricated in a 180 nm high-voltage CMOS process, the developed chip achieves a peak efficiency of 96.2% at a 48-to-4.8 V conversion ratio. 

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2. Energy-based Neural Network Controllers for DC-DC Converters

   https://doi.org/10.1109/COMPEL57166.2025.11121236  

   Tatkare, Kamakshi; Johnson, Brian (June 2025, IEEE)
3. Split-Capacitor-Based Isolated Double Step-Down DC-DC Converter

   https://doi.org/10.1109/JESTPE.2024.3426932  

   Duong, Truong-Duy; Nguyen, Minh-Khai; Wang, Caisheng; Nguyen, Bang Le-Huy; Cha, Honnyong (October 2024, IEEE Journal of Emerging and Selected Topics in Power Electronics)
4. An Efficient Complementary Topology Switched-Capacitor Based DC-DC Converter

   https://doi.org/10.1109/MWSCAS.2018.8624073  

   Lu, Ruikuan; Haider, Mohammad R; Massoud, Yehia; Uddin, Nasim (August 2018, 2018 IEEE 61st International Midwest Symposium on Circuits and Systems (MWSCAS))

   This paper proposes a complementary topology for Switched-Capacitor (SC) DC-DC converter to enhance the dynamic response. For battery charging unit with faster charging time requirement, one of the major restrictions comes from the equivalent output resistance of the SC DC-DC converter. By connecting one completely symmetric SC converter as complementary topology with the original single converter, the proposed SC DC-DC converter topology decreases the equivalent output resistance down to half. Simulated in 0.13-μm standard CMOS process, the simulation results show that this complementary SC converter gains faster dynamic response, shorter charging time, and higher energy-conversion efficiency. 

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5. A GaN-Based DC–DC Multistage Hybrid Converter for Step-Up Applications

   https://doi.org/10.1109/ECCE53617.2023.10362751  

   Nilian, Mohammad; Rezaii, Reza; Elrais, Mohamed Tamasas; Batarseh, Issa (October 2023, IEEE Energy Conversion Congress and Exposition)