A Multi-Path Inductor-First Inductor-on-Ground Switched-Capacitor Hybrid DC-DC Converter

IF 5.6 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Journal of Solid-state Circuits Pub Date : 2024-11-05 DOI:10.1109/JSSC.2024.3485210

Junwei Huang;Zhiguo Tong;Chi-Seng Lam;Xiangyu Mao;Rui P. Martins;Yan Lu

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Abstract

Energy-efficient compact smart devices operate at a supply voltage as low as 0.5 V, powered by either a battery (3–4.2 V) or a universal serial bus (USB) port (5 V), demanding a voltage conversion ratio (VCR) as large as 10:1. This work proposes a multi-path inductor-first inductor-on-ground switched-capacitor (L²SC) hybrid buck dc-dc converter for large VCR and high-power density. The inductors on the input and the ground nodes combine and reuse the parasitic inductors from PCB routing and bonding wire, enable a continuous input current, and relieve the electromagnetic interference (EMI) issue. In addition, the two inductors in this converter operate in an interleaved fashion, obtaining reduced output current ripple. The SC network reduces the average inductor current and enlarges the output capability. This work, fabricated in a 180-nm BCD process, uses only 2-V NMOS power transistors, withstanding 3–5-V input and delivering 0.5–1.2-V output. This work achieves a peak efficiency of 96.1% with a high chip-area current density of 1.02 A/mm².

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多路径电感器优先电感器接地开关电容器混合直流-直流转换器

节能的紧凑型智能设备在低至0.5 V的电源电压下工作，由电池（3-4.2 V）或通用串行总线（USB）端口（5 V）供电，要求电压转换比（VCR）高达10:1。本研究提出了一种适用于大型VCR和高功率密度的电感-电感-接地开关电容器（L2SC）混合降压dc-dc变换器。输入和接地节点上的电感结合并重用来自PCB布线和键合线的寄生电感，实现连续输入电流，并减轻电磁干扰（EMI）问题。此外，该转换器中的两个电感以交错方式工作，从而减小了输出电流纹波。SC网络降低了平均电感电流，增大了输出能力。这项工作是在180纳米的BCD工艺中制造的，仅使用2v的NMOS功率晶体管，承受3 - 5v的输入，提供0.5 - 1.2 v的输出。这项工作实现了96.1%的峰值效率，芯片面积电流密度高达1.02 a /mm2。

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来源期刊

IEEE Journal of Solid-state Circuits 工程技术-工程：电子与电气

CiteScore

11.00

自引率

20.40%

发文量

351

审稿时长

3-6 weeks

期刊介绍： The IEEE Journal of Solid-State Circuits publishes papers each month in the broad area of solid-state circuits with particular emphasis on transistor-level design of integrated circuits. It also provides coverage of topics such as circuits modeling, technology, systems design, layout, and testing that relate directly to IC design. Integrated circuits and VLSI are of principal interest; material related to discrete circuit design is seldom published. Experimental verification is strongly encouraged.