High-efficiency DC-DC converter chip size module with integrated soft ferrite

被引:37
作者
Hayashi, ZC [1 ]
Katayama, Y [1 ]
Edo, M [1 ]
Nishio, H [1 ]
机构
[1] Fuji Elect Corp Res & Dev Ltd, Device Technol Lab, Nagano 3900821, Japan
关键词
chip size module; dc-dc converter; microinductor;
D O I
10.1109/TMAG.2003.815895
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This letter describes a power supply module with an ultrathin, high-efficiency switching de-de converter system in order to meet increasing demand for smaller, thinner and lighter devices in portable electronic equipment. Usually, the inductor is the largest passive components in a converter system. We formed inductors on ferrite wafers as a substrate to mount an IC chip using thin film technology. This realized a significantly small and thin module. The external size of the module is 3.5 mm x 3.5 mm x 1.0 mm. Its maximum output power is 1 W, and its efficiency is up to 93.4%. A high power density of 81.6 W/cc was realized.
引用
收藏
页码:3068 / 3072
页数:5
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