In this video author is comparing in practice a buck converter with LM7805 linear voltage regulator. Here is the showdown buck converter vs linear voltage regulator.
In the video:
- Why & when you should use Buck converters?
- Advantages of linear voltage regulators
- Disadvantages of linear voltage regulators
- How to use linear voltage regulator?
- Where is buck converter used?
- Availability of Buck converters.
- Nomenclature with voltage regulators,
- How to use buck converters?
- Comparison of their usage,
- Testing both under loads for long time,
- Drawbacks of buck converters
What you learn from the comparison:
- Linear voltage regulator (78xx) use a lot more voltage compared to buck converter.
- Linear voltage converter heats up a lot to dissipate extra current,
- It switches off after heating up, and switches back on again.
- It consumes a lot more power compared to buck converter,
- Buck converter can provide variable output (by varying the potentiometer), whereas, a linear voltage regulator is stuck at only 1 output.
There are 2 mistakes in the video:
- 5:02 – 5:08 – correct calculations should be: (12V – 5V) x 0.42A = 2.94W
- 5:17 – 5:23 – correct calculations should be: (12V – 5V) x 0.22A = 1.54W