Connect with us

Recommendation for a "common" 3.3V LDO regulator?

Discussion in 'Electronic Basics' started by John, Dec 18, 2007.

Scroll to continue with content
  1. John

    John Guest

    My head is absolutely spinning after trying to find an easily
    available (i.e., multiple source) "generic" LDO voltage regulator to
    power a PIC and a few components. Just too darn many choices.

    The specs are:
    - Max. output current = 75mA (probably only 50mA)
    - Output voltage = 3.3V
    - Lowest input voltage = 3.6V
    - Highest input voltage = 5.1V
    - DIP package would be nice (for prototyping), SOIC OK.
    - Lower noise is nice as I'm using a PIC ADC input.

    Any favorites of yours that you might recommend?

  2. DJ Delorie

    DJ Delorie Guest

    The one I use most is Microchip MCP1700 (SOT23 and TO92, although I
    only use SOT23). 178 mV dropout (i.e. 3.5v min for 3.3v out), up to
    6v in. 250mA out depending on heatsink and package.

    I also have some generic TO220 linears.
    Hash: SHA1

    I second that - the 1700 seems to work great for everything I've done.
    It'll even work without a cap on the output (don't ask how I know that
    ;]), though I don't suggest doing it on purpose!

    If you're getting PICs you may as well choose the parts from the same place.

    - --
    Brendan Gillatt
    brendan {at} brendangillatt {dot} co {dot} uk
    PGP Key:
    Version: GnuPG v1.4.3 (MingW32)

    -----END PGP SIGNATURE-----
  4. John Larkin

    John Larkin Guest

    LP2985 is nice. It's stable with ceramic output caps.

  5. John

    John Guest

    Nice parts, thanks for the recommendations!
    I've ordered samples of each to play with. :)

Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day