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TPS622314-Q1: TPS622314 for Vout = 1.8V

Hans
Genius 12725 points
Part Number: TPS622314-Q1
Other Parts Discussed in Thread: TPS62231-Q1

Hello Team,

can I connect an external R-divider to the FB pin to get Vout=1.8V, please? If possible, which values for both resistors do you recommend?

Thanks and Best Regards,

Hans

  • 0
    TI__Genius 13460 points

    Hi Hans,

    TPS62231-Q1 device has fix output voltage of  1.5V. It is not good idea to use external resistor to change the output voltage as it might cause performance issue. Device already have internal feedback resistor and adding external resistor make device to go out of voltage accuracy that is define in datasheet.

    You can use TPS62231-Q1 device that offers 1.8V output voltage.

    Bets regards,

    Tanvee

  • 0 in reply to Tanvee
    TI__Genius 12725 points

    Hi Tanvee, 

    I know about the disadvantages. The question is still open: Is it possible or not? 

    Thanks and Best Regards, Hans

  • +1 in reply to Hans
    TI__Genius 13460 points

    Hi Hans,

    By adding resistor can always change the out put resistor. You can change output voltage by placing one resistor across FB pin and output voltage and you have to take care of more parameters like leakage current, resistor values and so on. From my side, it is possible but please do characterization of device for your application as it is outside TI datasheet recommendation. I don't suggest to use this as you know the disadvantages. 

    Best regards,

    Tanvee