Difference between lm317 and 7805?

Discussion in 'General Electronics Chat' started by Sarfaraz47, Aug 4, 2014.

  1. Sarfaraz47

    Thread Starter New Member

    Jun 10, 2014
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    What is the difference between lm317 and 7805?
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,087
    3,026
    They have different data sheets. You should read them. ;)
     
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  3. Lestraveled

    Well-Known Member

    May 19, 2014
    1,957
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    The LM317 is much more versatile than the 7805. As wayneh said, read the data sheet.
     
  4. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
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    The 317 is adjustable, the 7805 is fairly fixed (but can be tricked out).

    Read the data sheets for more.
     
  5. Dr.killjoy

    Well-Known Member

    Apr 28, 2013
    1,190
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    The LM317 beats the 7805 hands down ...
    Read the LM317 Datasheets it tells you why..
     
  6. BobTPH

    Active Member

    Jun 5, 2013
    782
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    Really? Even if you want 5V out with the fewest external components?

    Bob
     
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  7. bance

    Member

    Aug 11, 2012
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    I think Jason (Dr Killjoy) meant it is a more versatile part to have in your inventory.....
     
  8. Sarfaraz47

    Thread Starter New Member

    Jun 10, 2014
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    I think ErnieM's ans is fairly describe the purpose of these two ic's
     
  9. tom_s

    Member

    Jun 27, 2014
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    hope i no step on anyones toes and get scrubbed off the chrissy card list :)

    lm317 - adjustable positive voltage regulator 1.2 ~ 35v(?) and can happily supply that at an amp and a bit with a heatsink attached

    7805 - fixed positive 5 volt regulator about the same amperage as the lm317

    ditto :)
     
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