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  • DC DC power supply

    Im looking for a DC DC power supply that:

    Input: 12-30V
    Output: 5V
    Putput current: 150mA or more
    Efficiency: 85-90%

    I need it to be in a small package. If you know of any, please post. Thank you.
    http://www.mp3car.com/vbulletin/showthread.php?t=53815

  • #2
    I am acually looking for a switching regulator, so when the input ranges for 12-30V it should output 5V.
    http://www.mp3car.com/vbulletin/showthread.php?t=53815

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    • #3


      http://www.mp3car.com/store/product_...roducts_id=138
      EPoX mATX SocketA w/onboard Geforce4MX / 512MB PC2700 / AthlonXP 1600
      Lilliput / DVDrom / Opus 150W / WD 3.5" 160GB / SB Audigy NX
      XP home / Road Runner / iGuidance 4.0

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      • #4
        2 big and not quite what im looking for... im looking for something like this ( http://focus.ti.com/lit/ds/slts057b/slts057b.pdf ) but smaller and i dont need 1.5A of output current.. .. i need only 150mA

        http://focus.ti.com/lit/ds/slts057b/slts057b.pdf

        Thanks
        http://www.mp3car.com/vbulletin/showthread.php?t=53815

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        • #5
          Radio Shack 7805 5volt regulator.
          Originally posted by ghettocruzer
          I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
          Want to:
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          • #6
            I found what I was looking for, thanks for your help.

            http://cache.national.com/ds/LM/LM2671.pdf
            http://www.mp3car.com/vbulletin/showthread.php?t=53815

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            • #7
              Originally posted by modh1984
              I found what I was looking for, thanks for your help.

              http://cache.national.com/ds/LM/LM2671.pdf
              Overkill, and to much external components.

              Try a 7805 as mentioned earlier. Needs 2 caps and your done.

              Michael
              ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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              • #8
                >Try a 7805 as mentioned earlier. Needs 2 caps and your done.

                That's an LDO. Might get hot, but not too much at 50-100mA.
                Not high efficiency. Rather more like 40% efficiency.

                -Andrei



                Originally posted by Wiredwrx
                Overkill, and to much external components.

                Try a 7805 as mentioned earlier. Needs 2 caps and your done.

                Michael

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                • #9
                  Originally posted by andrewb
                  >Try a 7805 as mentioned earlier. Needs 2 caps and your done.

                  That's an LDO. Might get hot, but not too much at 50-100mA.
                  Not high efficiency. Rather more like 40% efficiency.

                  -Andrei

                  I agree it isn't very efficient, though I am not sure why that matters to the OP. As for heat, at 100ma that really shouldn't be an issue. If it is, he can always use something like an LM338, which at 100ma probably won't even notice the heat.

                  Michael
                  ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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                  • #10
                    heat produced at 150mA

                    will be nothing.

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                    • #11
                      7805 is too big... I need something smaller and i think the lm2671 will work for me. i didnt mention this on my first post but i need an enable pin also.
                      http://www.mp3car.com/vbulletin/showthread.php?t=53815

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