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TPS54339: TPS54339 Output voltage -5V function issue

Hsu cheng
Expert 1565 points
Part Number: TPS54339
Other Parts Discussed in Thread: TPS54335A,

The following is the TPS54335A 5V to -5V circuit

Can TPS54339  use this circuit to achieve the -5V function?

  • 0
    TI__Expert 4875 points
    Hi Hsu,

    Yes, TPS54339 could be used as a buck boost converter. The only thing I came up for your shcematic is that for EN of TPS54335A, the EN high threshold is 1.28V. If it is 5V to -5V, then EN could only be 1.28V when Vin=5V. Please change the EN R divider value.

    Best,
    Anthony