Abstract
The lap-top computer uses switched-mode power supply as a standard power source for supplying very low voltages (around 1V). The Multi-phase Buck is widely used in Voltage Regulator Modules (VRM) design because of its low cost and simplicity. But this topology has the drawbacks of narrow duty cycles when it operates at higher switching frequencies. The objective of this paper is to verify Quadratic buck converter performance for tight voltage regulation as well as good dynamic performance. The compensator design and PSIM simulation results of Quadratic buck converter with analog and digital type controllers are given using average current-mode (ACM) technique. The Bode plot based linear approach is used for tuning of controllers in both the voltage and current loops. The transfer functions of the two loops for digital controller is also given in Z-domain using Tustin approximation. The performance of controllers is tabulated for both load and line regulations.
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