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TPS51285B: 3.3V output not needed, can I ignore the external components for that side?

Tyler Reid
Prodigy 10 points
Part Number: TPS51285B

I'm wondering if I need the mosfets and corresponding passive components on the 3.3V side if I'm not using that output. Can I ground the 3.3V enable pin and leave the rest floating?


I'm doing a test for a client that wants it done with this specific IC, so changing to one that only does 5V is not an option.

  • 0
    TI__Mastermind 18510 points

    Hi, please follow below setting for unused channel2

    - VBST2:     Open

    - DRVH2:     Open

    - DRVL2:     Open

    - SW2, CS2, VFB2:   Connected to GND through 1kohm, can connect these 3 pins toghether with one 1kohm to GND.

    - EN2: Connected to GND through 1kohm

    Yuchang