Saturday, August 22, 2020

Making A 12 V To 5 V Buck Converter Using MC34063A

In the earlier post I wrote an overview of MC34063A with an example of a boost converter. Due to device data sheet, there exist another design example of creating a 12 V to 5 V buck converter.

In this section, I follow the design sample to create a complete working example of this stuff. I made my own experiment, schematic and PCB design at my work shop a few years ago.

Making A 12 V To 5 V Buck Converter Using MC34063A
Front Panel
Front Panel
Back Copper Panel

I take a screen shot of the design sample of that DC/DC buck converter from the device's datasheet.



Buck converter design sample

The design calculation lists below.


The experiment from the manufacturer list below.

The experiment result. The input voltage supplies up to 25 V.

Now I create my own custom schematic and PCB design to fit my own devices I possess. The overall example has completely test in both software simulation and physical hardware. I have test them all with testing instruments, but I did not take any photo of them.



Making A 12 V To 5 V Buck Converter Using MC34063A
Schematic Design

Making A 12 V To 5 V Buck Converter Using MC34063A
Circuit Simulation

Making A 12 V To 5 V Buck Converter Using MC34063A
Copper Side

Making A 12 V To 5 V Buck Converter Using MC34063A
Top Silk

Making A 12 V To 5 V Buck Converter Using MC34063A
Buck PCB Design



Making A 12 V To 5 V Buck Converter Using MC34063A
Buck Converter 3D View

Design file could download here.



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