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LM5164: Negative power supply

Tommaso Balli
Prodigy 30 points

Part Number: LM5164

I am simulating an inverting dc dc buck converter from +48V to -12V, using PSpice.

I've followed the guidelines on some application notes, but the circuit doesn't regulate any voltage and I can't find the error.

Attached the image of the simulated circuit. The resistance a inductance values arenot yet calculated to reach the correct output voltage, they are approximate.

  • 0
    TI__Mastermind 31156 points

    Hi Balli

    It may caused by  the silicon GND not connect to the Ground, which is the 0V reference potential. I would suggest connecting the as Ground_0. As below.

    Also, what is R4 for? Can you remove it for now?

    Thanks and Best regards.