Simulation of the operation of a DC–DC converter containing an inductor of planar type

This paper presents the design of a square planar spiral inductor, to integrate it into a DC–DC converter. The process of dimensioning of this integrated inductor has led us to identify all geometric parameters that are linked by a set of equations dedicated to this topology and to resolution of problems related to the substrate (skin effect, effect proximity, etc.). The equivalent electrical model adopted of the integrated inductor takes into account all the technological parameters which are described by analytic expressions. The results of different simulations concern the influence of geometry on the inductance value, on the different technological parameters and finally on its quality factor. In order to validate our dimensioning, we conducted simulations on the operating of our converter containing initially a conventional inductor and then a integrated inductor. Simulation results have shown that the waveforms of the current and output voltage in both cases are similar. This demonstrated the proper sizing of our integrated inductor.