Miniaturized solid-state battery-based DC-DC switched converter for ultra-low power applications
Résumé
Designing efficient, compact DC-DC converters for ultra-low power applications (below mW) is challenging, primarily due to significant switching losses. In contrast to switched-capacitor converters, switched-battery converters (SBCs) have recently emerged as a solution capable of maintaining high efficiency even at ultra-low frequencies (in the Hz range), while still achieving reasonable power density. However, initial SBC demonstrations relied on button cell batteries, which limited practical adoption in compact systems. This paper presents the first experimental demonstration of an SBC utilizing a solid-state battery, resulting in a reduced footprint. We achieve a power density of 0.26mW/mm3 with 80% efficiency using an 0.33mm3 battery while maintaining 250mV output voltage ripple. Furthermore, the paper highlights the favorable scaling laws governing SBCs, suggesting a promising design space for potential SBC adoption.
Domaines
ElectroniqueOrigine | Fichiers produits par l'(les) auteur(s) |
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