A novel DC-DC convertor using LTCC technology for magnetic integration application

作者:Xu Z Q*; Shi Y; Guo H P; Yang B C
来源:1st International Symposium on Spintronic Devices and Commercialization (ISSDC), 2010-10-21 to 2010-10-24.
DOI:10.1088/1742-6596/263/1/012010

摘要

A compact DC-DC convertor is proposed and fabricated in multilayer ferrite substrate using LTCC technology. The spiral conductors are buried into the ferrite substrate with a multilayer 3-D structure to reduce the volume of convertor. The passive integration of magnetic components and surface circuitry are achieved in a whole substrate and the size of module can be reduced markedly. The whole height of module is only 3mm, 1/3 of the height of conventional modules. Testing results indicate that the performance of the module is excellent in Point-of-Load (POL) field. The step-down DC-DC converter converts input voltage of 5V to output voltage of 3.3V. It is confirmed that the maximum conversion efficiency of 93.2% is sufficient for actual DC-DC converter application. Such a compact DC-DC convertor provides a compact, low cost and high reliability approach for power supply and magnetic integration application.

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