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    AMC1117 Substitute Question

    I have these REG1117A-ND IC 1A ADJ LW DRPOUT REG SOT223-4

    Will these work as a replacement?

    Thanks for the help

    #2
    Re: AMC1117 Substitute Question

    As long as "-4" indicates the tab, but that's rare. It has probably got one pin too many to fit.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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      #3
      Re: AMC1117 Substitute Question

      What are you going to use these TI regulator for as a replacement for what (what is the original part?)? Please clarify.
      Spec sheet for the REG: https://cdn.badcaps-static.com/pdfs/...054fca493e.pdf
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

      Comment


        #4
        Re: AMC1117 Substitute Question

        Originally posted by budm View Post
        (what is the original part?)? Please clarify.
        I think the clue is in the heading - AMC1117 Substitute
        Attached Files
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment


          #5
          Re: AMC1117 Substitute Question

          Ah, I missed that heading.
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

          Comment


            #6
            Re: AMC1117 Substitute Question

            To sub a 1117 you need to watch for many pitfalls:

            * Different package style
            * Different pin count
            * Different pin order
            * Adjustable or fixed, fixed come in many voltages.
            sig files are for morons

            Comment


              #7
              Re: AMC1117 Substitute Question

              Also the power dissipation rating, and he did not indicate if he has the fixed output type or adjustable AMC1117.
              Never stop learning
              Basic LCD TV and Monitor troubleshooting guides.
              http://www.badcaps.net/forum/showthr...956#post305956

              Voltage Regulator (LDO) testing:
              http://www.badcaps.net/forum/showthr...999#post300999

              Inverter testing using old CFL:
              http://www.badcaps.net/forum/showthr...er+testing+cfl

              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
              http://s807.photobucket.com/user/budm/library/

              TV Factory reset codes listing:
              http://www.badcaps.net/forum/showthread.php?t=24809

              Comment


                #8
                Re: AMC1117 Substitute Question

                Yes, there will be more numbers on the AMC1117 which will indicate the voltage. I believe that some fixed ones are variable to a certain extent
                up to their max output voltage.
                Please upload pictures using attachment function when ask for help on the repair
                http://www.badcaps.net/forum/showthread.php?t=39740

                Comment


                  #9
                  Re: AMC1117 Substitute Question

                  Originally posted by selldoor View Post
                  Yes, there will be more numbers on the AMC1117 which will indicate the voltage. I believe that some fixed ones are variable to a certain extent
                  up to their max output voltage.
                  Not quite. You can use a fixed output type as an adjustable by adding a pair of resistors in exactly the same way they are used on the adjustable type. However, the output voltage can be varied from the rated output voltage up to as high as you want as long as you stay within power dissipation and voltage drop limits. In other words, you could use a AMC1117-3.3 to drop a 20 volt supply down to 15 volts, just don't draw too much current. (The AMC1117 is rated for a maximum power dissipation of less than 1 watt, maximum input / reference differential of 13 volts. In the scenario I described the maximum current would be 200 mA.)

                  PlainBill
                  Last edited by PlainBill; 03-02-2012, 04:11 AM.
                  For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                  Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                  Comment

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