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Home | Product Categories | General ICs | COM-00526

Voltage Regulator - 3.3V

sku: COM-00526 RoHS Compliant In Fritzing Library

Description: Basic voltage regulators in the TO-220 package. Perfect for low voltage 3.3V parts. These are the LD1117V33.

Check out our Unregulated Power Supply Tutorial

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1,287 in stock

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images are CC BY-NC-SA 3.0

ASCII version


Comments 25 comments

  • pressurepoint14@gmail.com | about 2 years ago 3

    Today I learn a valuable lesson. Buy the parts first, then order the boards.

    • Electro | about 4 months ago 1

      Today I learn a valuable lesson. Do NOT assume all TO-220 voltage regulators have same pin-out. Check datasheet before soldering!

  • Tony Arkles | about 2 years ago 2

    One of the possible parts is low-dropout and the other is not. Any way to predict which part you’ll get if you order?

  • Cullen | about 2 years ago 2

    Another suggestion—sell these two ICs under different product numbers since they have different pin configurations. That way you’ll know what you’re getting.
    I’m a huge fan of Sparkfun, but I got burned pretty bad on this one—I ended up losing a custom PCB and most of the parts on it. Shame on me for not double checking the number on the IC but I never thought in a million years I’d get the same part with a different configuration…

  • aMeyer | about 3 years ago 1

    Just incase anyone else was confused by the doc sheet on this.
    it is ground, V out, V in.
    The PDF made me think it was V in, Ground, V out

  • Dent | about 2 years ago 1

    Kinda sneaky how these got changed around. Luckily I was only breadboarding.
    The 7833s go: IGO: Input Ground Output
    The LD33Vs go: GOI: Ground Output Input
    These pinouts are all left to right as seen in the first image above. The tabs of both types are connected to the center pins.

  • Gintaras | about 2 years ago 1

    Suggestion; sell surface mount versions of these, I have a hard time finding them in other stores.

  • OldFar-SeeingArt | about 2 years ago 1

    WTF? You are selling two completely different parts with DIFFERENT pinouts as the SAME NUMBER????
    WTF?
    And this is going to help your customers how, exactly???

  • Scotty | about a year ago 1

    Gintaras:


    Suggestion; sell surface mount versions of these, I have a hard time finding them in other stores.



    I second this motion! Those would come in handy…

  • Robomaniac | about a year ago 1 
    Search for  
"V_REG_LD1117VXX"  
in the sparkfun library
  • TimFirebird | about a year ago 1

    Which is the correct pinout?
    The datasheet says:
    1: GND
    2: Vout
    3: Vin
    While both the LM7805 which is also a TO-220 package
    and the Eagle library of April 13th 2010 (V_REG_LD1117X) have:
    1: Vin
    2: GND
    3: Vout

  • oz-solutions | about a year ago 1

    guys make sure you triple check the pins on this thing, i don’t mean to be a troll, but this thing somehow killed my netduino mini. So make sure you put it on a bread board and test it, before you hook it up to something else… and sparkfun whats up with the laziness? just make a clear note on the product description. this really upset me.

    • TimFirebird | about a year ago 1

      So you have one and probably tested it by now?
      Or at least you know which pinout is wrong?
      Could you share it with us?

      • oz-solutions | last year 1

        take a look at dent’s comment. he has the correct pins i tihnk. still make sure you test it with a battery or something before you hook it up to your actual project or whatever.

  • mbrown9412 | last year 1

    Guys: pinouts for voltage regulators are usually: 1: in; 2: GND; 3: out; and the gnd for the big back part as well

  • BenB | last year 1

    I ordered several of these a while back. I can confirm that the ones I received match the data sheet. (From left to right facing the plastic-ish side) 1: GND 2: Vout 3: Vin

  • pp.kettu | about 8 months ago 1

    For many applications, this one is unnecessaraly big. How about storing something like MCP1702-33?

  • PlanetaryGear | about 6 months ago 1

    And I too have now lost parts due to this pinout. Was getting really close to getting that xBee working too before I cooked it. The pinout on the one I got is correct as far as the datasheet is concerned and I had it working once. Then rebuilt the power supply on the breadboard from my memory of the 5v one which is totally different. PLEASE NOTE: this pinout is not the same as the millions of other regulators you’ve used.

  • Bootsie | about 3 months ago 1

    I’m really new to this so I’m sorry if this is a newbish question, but do I basically just plug one pin into my 6V input, one pin into ground and the last will put out a nice 3.3V? Thanks!