Design of multi-turn LTCC inductors for high frequency DC/DC converters

Abstract

This paper focuses on designing of multi-turn spiral inductors with multilayer parallel-connected conductors for high frequency DC/DC converters based on low temperature cofired ceramic (LTCC) technology. Effects of conductors' arrangements on performance of LTCC inductors are analyzed. Based on observation and analysis, a model to approximate inductance of LTCC inductors is derived. Simulation results are provided to verify accuracy of the model. At last, a prototype is fabricated and tested in a 8MHz switching-mode buck converter. I.978-1-4244-4783-1/10/$25.00 ©2010 IEEE