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LM25085: LM25085

Mario Schuppan
Prodigy 160 points
Part Number: LM25085
Other Parts Discussed in Thread: LM73605, LM76002

Hello,

on the Picture you could see my workbench Design.
I would like to use an 24V Input. Then I Need 5V 5A to make PCIe, USB3.0 an Ethernet.

Does this work for my reason ?

  • 0
    TI__Mastermind 49587 points
    Hi Mario,

    The LM25085 is one possible controller solution for your power requirement. Note that the LM25085 is a COT-based controller, requiring the appropriate voltage ripple amplitude at the FB pin (and hence the recommended ESR of the output capacitor).

    An alternative is a converter solution based on the LM73605 (3.5V to 36V, 5A synchronous buck converter), which will provide higher efficiency than the LM25085 non-synchronous solution.

    Regards,
    Tim
  • 0 in reply to Timothy Hegarty
    Prodigy 160 points
    Hi Tim,

    the LM73605 Looks nice and I designed now an cicuit with the design-workbench.

    what Kind of cooling did you prefer for this component?
    And did you know a good poweradapter to use this ?

    I Need in one circuit 24V and nearly 1.7A
    The other circuit had to bring 5V and 5A

    regards
  • 0 in reply to Mario Schuppan
    TI__Mastermind 49587 points
    Hi Mario,

    You can review the layout section of the LM73605 datasheet for further guidance releated to thermal performance.

    For the 1.7A output, you may consider a 2A converter such as the LM76002 (60V max input, 2A out).

    Regards,
    Tim