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LMG1020: IN- pin

Takashi Yamaguchi
Genius 13360 points
Part Number: LMG1020

Hi team,

My customer is considering to use LMG1020 for GaN FETdrive.

The customer would like to control the LMG1020 with 3.3V MCU. In this case, customer is worried that a reverse current flows from VDD(5V) to IN- through an internal pull up resister. Therefore, the customer would like to keep the IN- to low level(GND) always, and they would like to drive the GaN FET by inputting 3.3V pulse to IN+. Is this usage acceptable? 

According to the LMG1020EVM, the IN- pin is pulled down to the GND. Therefore, I think that the usage that the customer thinks can be used.

Regards,

Yamaguchi

  • 0
    TI__Genius 12990 points

    Hi Takashi,

    Thanks for reaching out about lmg1020.

    The inverting input IN- needs to be pulled to GND in order to enable the part. Grounding IN- and pulsing  IN+ to drive the Gate is how the part is driven on the evm and is an acceptable use of operation.

    Please let me know if you have any other questions.

    Thanks,