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  1. #1
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    MP1584 5v regulator voltage drop problem

    I was debugging the MP1584 module, 5v regulator circuit in the PCB.
    I have attached my debug circuit below.

    Click image for larger version. 

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    I have completed my circuit in breadboard and PCB also, but I was connected to any load below 2A.

    It will produce the voltage drop and alternative output voltage.

    Mp1584 specs : max 3A , i/p volt = 4.5v to 28v , my i/p volt = 12v

    I need 5v output and less than 2A current

    MP1584 datasheet :

    https://www.monolithicpower.com/pub/...P1584_r1.0.pdf

    can anybody help this problem...???

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  2. #2
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    Re: MP1584 5v regulator voltage drop problem

    You didn't report the observed problem, just a vague question title.



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  3. #3
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    Re: MP1584 5v regulator voltage drop problem

    Hi,

    What is the problem?

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  4. #4
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    Re: MP1584 5v regulator voltage drop problem

    When I connected to load , the output voltage is dropped.



  5. #5
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    Re: MP1584 5v regulator voltage drop problem

    Hi,

    Please try to give useful informations.
    * I can't find information about voltage drop in post#1.
    * Now we know that you are concerned about voltage drop. But we don't know how much (maybe I just didn't find it?)
    --> A bit of voltage drop is quite expectable.

    But "no load voltage" often is not useful. Most voltage regulators are specified with "minimum load". I recommend to use at least 5mA of minimum load (1 kOhm) to get comparable measurement results.

    ***
    I see you used a breadboard. This is not useful because you usually cant fulfill layout considerations with a breadboard. Did you read and keep on "PCB LAYOUT GUIDE" section of the datasheet? It is essential for proper operation.

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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