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TPS55289: Schematic check

Part Number: TPS55289
Other Parts Discussed in Thread: TPS55288

Hi TI Teams,

Can u help to check the design of TPS55289. The schematic is show as below:


Kind Regards

  • Hi Lumina,

    I would like to double check the circuit input/output parameter with you:

    Vin: 5-20V

    Vout: 5V

    What's the maximum Iout?

  • Hi Zack,

    Yes, the Vin is 5 to 20V DC, the Vout is 5V, and the maximum Iout is 8A (5V/8A).

    And we have another application of the TPS55289, that is, we added the I2C communication, and the input is 24V, the output voltage have 5 level (5V/9V/12V/15V/20V), and the Iout is 3A to 5A. Is there any suggestion for this application?


    Kind Regards

  • Hi Lumina,

    TPS55289 cannot output 5V 8A because it is out of the device current limit spec.

    I would suggest you select TPS55288.

    For the second application, TPS55289 could output 3A. But 20V/5A, 100W is quite challenge for TPS55289. The device thermal rise would be a concern if customer layout is not well designed.