This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS22916: ON pin connected with IN pin

Part Number: TPS22916

Tool/software:

Hi,

In my customer's configuration of their circuit with TPS22916, the  customer connects ON pin with IN pin.  It means VON = VIN.  

Does this configuration works well?

Best Regards, Taki 

  • Hi Taki-san,

    Yes, this is fine. Abs max limit for both the pins is same (<6V).

    Best Regards,
    Arush

  • Hi Arush-san,
    Thank you for your reply.  I understood it's no problem from point of view at Abs max.

    The datasheet shows some power up sequences.  In the all sequences,  Vin has been in stable after turning on before VON is enabled.  
    The key point of this inquiry is that VIN and VON goes up at same time.

    Based on the above situation, can the load switch be enabled correctly? 

    Best Regards, Taki

  • Hi Taki-san,

    Keeping the Von high and then providing the Vin or ramping both Von and Vin together should be no issue for this device. 

    Just want to confirm something. Did the customer short Vin with Von or used a resistor between them. There is a internal pulldown resistor (750kOhms) at ON pin when the Von < V_IL. If they don't have any resistor between the connection, they might see some leakage current.

    Best Regards,
    Arush

  • Hi Taki-san,

    Another thing I should mention, the leakage current will be negligible. If you are seeing higher current then it will be helpful if you can share some waveform to verify if something unusual is happening or not.

    I also did some quick test to check the startup. I didn't see anything unexpected. 

    Best Regards,
    Arush