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TPS746-Q1: Please review the schematic

Chase Jeong
Mastermind 7820 points
Part Number: TPS746-Q1


Tool/software:

Dear TI experts,

My customer made their first schematic using TPS74601PQWDRBRQ1. Could you review this schematic?

Best regards,

Chase

  • 0
    TI__Expert 6990 points

    Hi Chase,

    Devices look properly configured for 3.34Vout, values sized correctly.

    However, the PG pin is not useable in that configuration, you can leave the pin floating if you're not using it. Otherwise, the resistor has to be going to a powered line so it can pull down, typically the out rail. In this situation it will switch from ground to ground.

    Best,

    Gregory Thompson

  • 0 in reply to Gregory Thompson
    Mastermind 7820 points

    Dear Gregory,

    Thank you for your support.

    Could you check more questions from my customer?

    1. Customer added C160 on the line of EN pin. Is it okay for normal operation?

    2. Is it okay to make the layout like below?

    Please check these issues. Thanks.

    Best regards,

    Chase

  • 0 in reply to Chase Jeong
    TI__Expert 6990 points

    Hi Chase,

    The layout looks good to me. The loops for the feedback look and capacitors look good and no issues noticed. Since both parts are somewhat close together you may want to take advantage of thermal vias near the chip going to the ground plane the increase thermal conductivity.

    Best,

    Gregory Thompson