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LM5005: Inverting buck-boost EP

semih şen
Prodigy 20 points
Part Number: LM5005

Tool/software:

Hi team,

We have recently designed an inverting buck-boost converter (24 V input to -15 V output at 150 mA) using the LM5005. The schematic is shown below. However, we mistakenly connected the EP (Exposed Pad) to 0 V (system ground) instead of -15 V (converter ground). Is there any chance the circuit might still operate reliably, or would it be better to leave the EP unconnected in the prototype phase, despite the potential thermal issues?

Best regards,

Semih

  • 0
    TI__Guru 58171 points

    Hello Semih 

    EP should be connected to the AGND pin. The device might be damaged if there is a DC voltage difference between EP and AGND. If the EP is floating, the device might not be damaged,  but we haven't evaluated the device functionality thoroughly when the EP is floating. 

    -EL