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LM25143: spec check

GARETH OU
Guru 11495 points
Part Number: LM25143

Tool/software:

Hi 

Can the LM25143 VCCX be connected directly to an external 5V supply to lower the IC Temperature?

  • 0
    TI__Expert 6515 points

    Thanks for your question. I will look into it and get back to you

    Thanks and Regards

    Naresh

  • 0 in reply to Naresh Adepu
    TI__Expert 6515 points

    Hello Gareth,

    Yes, LM25143’s VCCX pin can be directly connected to a regulated external 5V supply to lower IC temperature and improve efficiency. Please ensure:
    • The external 5V does not exceed 6.5 V at any time, per absolute maximum ratings.
    • VIN must always be higher than the external 5V bias to prevent reverse currents and possible device damage
    • Using external bias is a valid method to bypass internal regulator dissipation and is recommended for thermal performance
    Refer to the LM25143 datasheet for detailed recommendations and ensure all system conditions stay within the specified ratings

    Thanks and Regards

    Naresh