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TPS63000

Discussion in 'Electronic Design' started by AJ, Feb 27, 2007.

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  1. AJ

    AJ Guest

    Hi,

    I have been prototyping a TI TPS63000 Buck-Boost converter and have set up a
    circuit as per the datasheet but I am finding that the quiescent current
    with no load is about 2.5mA with a 4V input and a 3.6V output where the
    datasheet states that it should be < 50uA. Has anyone else had any
    experience with these particular devices?

    Here is a link to the datasheet for anyone interested...
    http://focus.ti.com/lit/ds/symlink/tps63000.pdf

    Best regards,


    AJ
     
  2. mpm

    mpm Guest

    Sorry, not familiar with that one.
    You might look at the Enable and make sure it's driven completely to
    the rail.
    Buck/Boost regulators sometimes pull extra juice when not fully
    enabled (or disabled).

    Good luck.
    -mpm
     
  3. AJ

    AJ Guest

    Thanks anyway but I have it all sorted now. I ended up bringing out the old
    etching tank and making a PCB so I could easily play with the EN and PS/SYNC
    pins. It turns out that the PS/SYNC pin needs to be low to achieve the
    advertised <50uA quiescent current.

    Best regards


    AJ
     
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