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TPS63021: Need help reviewing Buck Boost design for TPS603021

Milind Manoj
Prodigy 170 points
Part Number: TPS63021

Hi,
The following are the design parameters

Vin: 3V to 4.2V (Li Ion Battery)

Vout: 3.3V
Iout: 600mA

Following is the schematic and PCB design . Need a review for the same.

Thanks!

Milind
Hardware Engineer
PupilMesh Private Limited

  • 0
    TI__Expert 7925 points

    Hi Milind,

    Thanks for reaching out.

    The schematic looks fine. For the PCB, you need to do the following changes:

    1. Add more GND vias close to the GND ends of input and output capacitors C45-49.
    2. Connect the GND end of C33 directly to the GND pin of the TPS63021.

    It is important to have as small as possible GND loops between the input/output capacitors and the IC. I have left some links with PCB layout guidelines in your previous thread.

    Best regards,
    Milos