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Stumped... can someone identify this surface mount component?

Discussion in 'Datasheets, Manuals and Component Identification' started by appliancesolutionz, Feb 17, 2015.

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  1. appliancesolutionz

    appliancesolutionz

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    Sep 29, 2014
    It's got 3 legs (sot-323) and is marked with a PMMQ. It is also marked as "U" on the circuit board. Is anyone familiar with this component?

    Thank you!
     
  2. davenn

    davenn Moderator

    13,877
    1,964
    Sep 5, 2009
    U on a PCB "normally denotes an IC rather than a transistor which are normally denoted Q and sometimes T or TR

    maybe its a 3 pin regulator ? show us a sharp and well lit pic
     
  3. appliancesolutionz

    appliancesolutionz

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    0
    Sep 29, 2014
    Hi,

    Thank you for your reply and help! Here is the picture you asked for. One more thing... it reads PMMQ. I've seen them read other markings as well.
     

    Attached Files:

  4. appliancesolutionz

    appliancesolutionz

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    0
    Sep 29, 2014
    Anyone might know what that is? I posted a picture, would appreciate any help on that. Thank you.
     
  5. davenn

    davenn Moderator

    13,877
    1,964
    Sep 5, 2009
    the component in the pic is too messy with solder flux or something to read anything on it

    cant help any further
    maybe you can search for a circuit diagram for the unit whatever it is ??
    you may need to go to the manufacturer
     
  6. kpatz

    kpatz

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    88
    Feb 24, 2014
    Can you post a decent resolution pic of the entire board? Or at least the area of the board where the mystery part is?

    What is the board from? What does it do?
     
  7. appliancesolutionz

    appliancesolutionz

    7
    0
    Sep 29, 2014
    The chip has a number on it, "PMMQ". It stems from the main microchip. That is really all I know. Obtaining circuit diagrams aren't really possible. It's for an appliance. Any suggestions?
     
  8. davenn

    davenn Moderator

    13,877
    1,964
    Sep 5, 2009
    without more circuit info, not really :(
    I couldn't find any reference to a PMMQ device in google
     
  9. appliancesolutionz

    appliancesolutionz

    7
    0
    Sep 29, 2014
    There is nothing on it, other than "PMMQ".
     
  10. davenn

    davenn Moderator

    13,877
    1,964
    Sep 5, 2009
    OK then as I suggested earlier, you may need to go to the manufacturer of the equip and see if a schematic is available


    Dave
     
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