I need to find a regulator IC for a DC circuit

Discussion in 'General Electronics Chat' started by ranatungawk, Nov 1, 2009.

  1. ranatungawk

    Thread Starter Senior Member

    Oct 30, 2008
    147
    0
    I need to find a regulator IC for a DC circuit. LM317 is ideal for this but my in-put voltage goes up to 100V sometimes. so LM317 cant be used for this because it’s working voltage is 4-40V. Please tell me suitable regulator IC which works just as the LM317 for this circuit.
     
  2. Xantor123

    New Member

    Nov 1, 2009
    4
    0
    If the 100V are transient spikes you can use a resistor/zener in front of the LM317 to clean it up.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    What will be your output voltage?
    What will be the current needed?

    Greetings,
    Bertus
     
  4. ranatungawk

    Thread Starter Senior Member

    Oct 30, 2008
    147
    0
    out put 38V/40mA
     
  5. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    Then you could try a TL783.
    See datasheet.

    Greetings,
    Bertus
     
  6. ranatungawk

    Thread Starter Senior Member

    Oct 30, 2008
    147
    0
    Thanks a lot for the knowledge you are sharing ..

    if so can I use TL783 instead of LH317 without changing other components in my circuit?
    (can I replace blindly ?)
     
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