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TPS63002: Need buck-boost with I2C output configurability

Josh%20Mandich
Intellectual 1155 points
Part Number: TPS63002
Other Parts Discussed in Thread: TPS63802

What do you recommend for a buck-boost regulator with I2C capabilities for adjusting the voltage outputs.

  • VIN range of 1.8 – 5.5V
Variable Vout range 3.3 – 5.5V
    Iout: <2A

Maybe there is another way to change the voltage output if we have no I2C parts?

  • 0
    TI__Guru 58225 points

    Hello Josh,

    At the moment we do not have a buck-boost converter that has an I2C interface.

    A possibility to change the output voltage of a buck-boost converter is to add a DC voltage to the feedback node. This reference design is using this method:

    TPS63802 could be a good candidate for your request.

  • 0 in reply to Brigitte
    TI__Guru 58225 points

    Hello Josh,

    I haven’t heard back so I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out).

  • 0 in reply to Brigitte
    TI__Intellectual 1155 points

    Thank you for the info, very helpful.

    When looking at the control topology, can any voltage controlled SMPS be used in this manner, or are there other constraints?

  • 0 in reply to Josh%20Mandich
    TI__Guru 58225 points

    Hello Josh,

    Manipulating the feedback node is possible for all converters that have a feedback node. Nevertheless, it is necessary to check it out in detail because this manipulation could cause regulation issues because the control loop that is added in addition to the already existing control loop(s) could cause some instabilities in the system.

    A general rule would be to make the added control loop slow compared to the converter control loop.