Just how different are linear, LDO and switching buck voltage regulators? I'm glad you asked!
You might be surprised...
It's tutorial time.

NOTE: There are many different methods of SMPS control, this is just one of the simple ones, go investigate!

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By YTB

25 thoughts on “Eevblog #90 – linear and ldo regulators and switch mode power supply tutorial”
  1. Avataaar/Circle Created with python_avatars Platin 21 says:

    This needs a update.

  2. Avataaar/Circle Created with python_avatars thesnax says:

    Can confirm Electrical Engineering Degrees are bullshit out of learning IC Design

  3. Avataaar/Circle Created with python_avatars rediculousman says:

    Mecheng here.
    I had the opportunity to choose my subjects when I did the study abroad program.
    I decided to throw myself in the deep end and do a final year analogue electronics theory course.
    It was one of the most interesting subjects I have ever done.
    Learning to model these circuits in the frequency domain was super useful later on when I had to do modelling of mechanical systems!

  4. Avataaar/Circle Created with python_avatars Robert Neill says:

    Do LDO regulators use a Szikali pair pass transistor stage? This will not need an inverse connection for the op-amp as the driver transistor is still a NPN transistor. I do get confused about the forward gain of the Szikali pair. I think it's mainly the driver transistor in this calculation.

  5. Avataaar/Circle Created with python_avatars Ghost of Sparta says:

    So you are telling us, boiled eggs and scrabbled eggs are same? ๐Ÿ™‚

  6. Avataaar/Circle Created with python_avatars Demographic Replacement says:

    I think this is an excellent way to explain things.

  7. Avataaar/Circle Created with python_avatars John Smith says:

    This is not the right way to explain things.
    Blah blah blah blah blah…
    You give an overall idea of how it works. Then you focus on each part and what they do.
    You break it down, take a breath, divide each section.
    Otherwise it's just a bunch of words that don't mean anything.

  8. Avataaar/Circle Created with python_avatars mohamed lamine says:

    But still linear PS better

  9. Avataaar/Circle Created with python_avatars Machine Language says:

    I scare a lot about SMPS.

  10. Avataaar/Circle Created with python_avatars DOSEcTOrIBlE says:

    I thought the switch mode power supply adjusts the duty cycle to compensate output changes rather than switch on/off oscillator output ?

  11. Avataaar/Circle Created with python_avatars GeneralPurposeVehicl says:

    bandgap voltage? wouldn't that mean the reference would glow?

  12. Avataaar/Circle Created with python_avatars Dream says:

    But…. I love u ๐Ÿ˜˜

  13. Avataaar/Circle Created with python_avatars Snap-off says:

    Me: "Switching mode power supply," enter
    Me: Scrolls
    Me: Yeah lets learn it from nerd Geddy Lee, click.
    Love ya Dave.

  14. Avataaar/Circle Created with python_avatars Chakresh Joshi says:

    Thanks sir!

  15. Avataaar/Circle Created with python_avatars Ben Wolfe says:

    Dave the realest

  16. Avataaar/Circle Created with python_avatars P.J. Fox says:

    Great stuff. Dave is a champ!

  17. Avataaar/Circle Created with python_avatars HK says:

    Excellent even in 2022 lol!!

  18. Avataaar/Circle Created with python_avatars Lukas Stieglitz says:

    what a great teacher

  19. Avataaar/Circle Created with python_avatars tjunkie says:

    weird coincidence, I just watched "Out of Time" movie 10 min ago, and there is that license plate on the shelf… spooky

  20. Avataaar/Circle Created with python_avatars Harsh Soni says:

    Gald to learn

  21. Avataaar/Circle Created with python_avatars Harrison Phillips says:

    Where does the reference voltage come from? How does it just have a reference voltage to try and match

  22. Avataaar/Circle Created with python_avatars Naeem Ahmed says:

    Phasi gay……

  23. Avataaar/Circle Created with python_avatars Bo Redfearn says:

    thanks again yo

  24. Avataaar/Circle Created with python_avatars WR Electronics Research & Development says:

    Good day sir, can I ask if is it possible or okay if we convert switch mode power supply to linear also? Thanks in advanced. I have a mixer here, exactly the Yamaha mgp12x, it was dead for the reason of voltage fluctuation, and when I opened it I found out that it uses switch mode PS, and I thought SMPS are not reliable or durable when it comes to situation like that than linear/old school so to say, though smps are efficient, but yeah, can I trade efficiency to durability? Thanks.

  25. Avataaar/Circle Created with python_avatars Plautus Satire says:

    Demeanor has changed a lot over the years

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