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TPS25751: how to handle pin18 when unused

Will Wang47
Expert 7670 points
Part Number: TPS25751
Other Parts Discussed in Thread: PMP41083

Hi team,

TPS25751D pin18 Datasheet mention NOT connect to GND.

However, reference design PMP41083 did connected to GND.

Could you help clarify how should customer handle TPS25751D Pin 18 I2Cc_IRQ when unused?

Thanks and Best Regards,

Will

  • 0
    TI__Mastermind 30172 points

    Hi Will, 

    Thank you for reaching out!

    Apologies for the confusion here.

    If unused, pin 18 should be tied to LDO_3V3 via pull-up resistor. There are instances where unexpected behavior may occur if tied to GND. 

    You may also refer to the schematics in the TPS25751 EVM User Guide: 

    Please let me know if you have additional questions/concerns. 

    Best Regards, 

    Aya Khedr