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TPS61094DSSR

Other Parts Discussed in Thread: TPS61094

Hello:

   I have a issue when using the TPS61094, the SUP pin is connected to a supercapacitor, during the test I found that when the external power supply is disconnected, the supercapacitor enters the boost-on mode , but  there is a level voltage on the VIN pin of the TPS61094, the voltage on the VIN pin is reduced to 0V until the supercapacitor discharge ends,What is the reason?

   Input voltage:5V  ;Target output voltage:3.8V

   

  • Hi qingqing.lu,

    Thanks for reaching out.

    Could you please tell what is the status of EN and MODE? I found R12 and R13 are NC in your schematic, so are they floating?

    If R12 and R13 is not NC, then what is the EN and MODE when external power supply is disconnected?  Thanks.

    Regards,

    Nathan