Piezoelectric DC-DC converter unifies all power switches onto single chip, increasing power density

https://techxplore.com/news/2024-02-tiny-power-vibrational-energy.html

"integrated dual-side series/parallel piezoelectric resonator-based 20-to-2.2V DC-DC hybrid DSPPR converter... 310% loss reduction... enhanced performance especially at voltage conversion ratios <0.1... enhanced phase-control precision... additional capacitive-based converter stages, pre- and post- converter... minimizes demand on piezoelectric material so compact... marginal increase (<10%) in additional capacitors... high-power computing servers, automotive systems, USB chargers, battery-powered devices"