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A Monolithic Voltage-Scalable Fibonacci Switched-Capacitor DC–DC Converter With Intrinsic Parasitic Charge Recycling.
- Source :
- IEEE Transactions on Very Large Scale Integration (VLSI) Systems; May2019, Vol. 27 Issue 5, p1105-1113, 9p
- Publication Year :
- 2019
-
Abstract
- Switched-capacitor converter (SCC) features a compact solution due to its magnetic-less structure, which fulfills the high density requirement in low power applications. Compared to other SCC topologies, Fibonacci switched-capacitor converter (FSC) utilizes the least number of flying capacitors to perform any voltage conversion. This paper proposes a monolithic voltage-scalable FSC, which can be used in energy harvesting applications. The challenges to implement on-chip FSC are addressed. The parasitic charge loss is substantial in FSC. Therefore, a charge recycling technique exploiting the presence of parasitic capacitors in each other phase of FSC has been employed resulting in 27% reduction in the power loss, which improves the overall efficiency by 12.7%. For a proof of concept, the proposed converter is implemented in 0.5- $\mu \text{m}$ CMOS technology on 4-mm2 die area. The postlayout simulation is carried out using Virtuoso ADE. With 0.3-V input voltage, the system achieves 47.5% peak power efficiency with 5- $\mu \text{W}$ load. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10638210
- Volume :
- 27
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Very Large Scale Integration (VLSI) Systems
- Publication Type :
- Academic Journal
- Accession number :
- 136117405
- Full Text :
- https://doi.org/10.1109/TVLSI.2019.2893943