Here is circuit switching regulator 5V 5A for digital circuit. Use IC LM2678-5.0 is High Efficiency 5V 5A Step-Down Voltage Regulator This is good power supply, small size and do not hot.
All about switching power supply circuit diagram and PCB
How to use TL497 as the switched mode power supply schematic that output current of 500mA, and there are 3 model: step down,step-up and inverting voltage converters. Now, a switching power supply is high popular. Which we are use to suggest a lot of projects. Those who want the switched mode power supplies that has small size and high-efficiency. We think that this article is that your want, but tell before that they can provide lower current about under 500 mA, so Suitable for the study only. But can seriously apply, and can be easily increased current to widely applied.…
It is a great idea. but It is suitable for an old hand!