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Design Of Buck Converter For Low Power Application A Comparative Study For Selecting The Semiconductor Devices
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Published: April 30,2026Design Of Buck Converter For Low Power Application A Comparative Study For Selecting The Semiconductor Devices
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1. Department of Electrical and Energy Engineering, Faculty of Electrical Engineering, Institute of Technology of Cambodia, Russian Federation Blvd., P.O. Box 86, Phnom Penh, Cambodia
Received: January 28,2025 / Revised: April 23,2025 / / Accepted: April 30,2025 / Available online: April 30,2026
This paper presents a detailed analysis of semiconductor device selection for a buck converter, emphasizing the optimization of MOSFETs and diodes to enhance performance and efficiency. The study evaluates three MOSFETs (IRFZ44N, IRFZ46N, and Si4410DY) in combination with three diodes (MBRS340, MBR745, and B550C) to assess their influence on converter efficiency, voltage ripple, and output stability. Comprehensive calculations for passive components, including inductors and capacitors, are performed to ensure an optimal design for stepping down a 12V input to a 5V output with a 2A load. Simulations using LTspice provide insights into component behavior under varying conditions, enabling a comparison of performance metrics for different MOSFET-diode pairings. Additionally, the study includes a PCB layout design for the optimized buck converter, facilitating practical validation of the simulation results. The results highlight the best pairing based on voltage ripple, efficiency, and output stability. This study offers valuable guidelines for selecting semiconductor devices in buck converter designs, striking a balance between performance and cost-effectiveness.