A 12V-Input 1.8V-0.8V-Output Multiple-Output Hybrid Buck DC-DC Converter with a Shared Flying Capacitor
This paper presents a 12V-input 1.8V-0.8V-output multiple-output hybrid buck (MOHB) DC-DC converter with a shared flying-capacitor (C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">F0</inf>) and real-time C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">F0</inf> voltage calibration, while the main control loop uses a pulse-width modulation (PWM) control scheme. With the proposed time-interleaving operation scheme, the MOHB converter has no cross regulation during load transient. The real-time C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">F0</inf> voltage calibration ensures that the voltage across CF0 equals V<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">IN</inf>/2. The MOHB converter is designed with four outputs and simulated in an 180nm BCD process. Each output employs a 1μH power inductor with 19mΩ DCR and one 4.7μF flying capacitor. With 12V input, one output equals to 1.8V and other outputs equal to 1V, the peak efficiency 95.2%.
Authors
- Junwei Huang (ORCID: https://orcid.org/0000-0003-0774-446X)
- Fang Luo (ORCID: https://orcid.org/0000-0002-3584-0355)
- Mo Huang (ORCID: https://orcid.org/0000-0003-0497-194X)
- Yan Lü (ORCID: https://orcid.org/0000-0001-9273-7576)
- Rui P. Martins (ORCID: https://orcid.org/0000-0003-2821-648X)
Institutions
- University of Macau (MO)
Publication Details
- Published
- 2025-05-25
- DOI
- https://doi.org/10.1109/iscas56072.2025.11043422
- Primary Topic
- Multilevel Inverters and Converters
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Technology Development