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UCC27528: what's the negative input voltage range for?

Part Number: UCC27528

Hi,

from datasheet, the input voltage is -5V~18V. questions are as below:

1 input logit is CMOS, can CMOS input meet negative since VDD is 4.5~18V?

2 in which application input will be negative?

thank you!

Best regards,

Yuan

  • Yuan,

    Thanks for reaching out!

    1)  Yes, the part is robust enough to handle that spec.  The spec is given to show that the part can handle GND bounce that is common in high-current switching applications.  This is explained in greater detail in this technical article:  https://www.ti.com/lit/an/slua939/slua939.pdf

    2)  There is no typical application that would put a negative voltage on the input pins on purpose; again, the negative voltage spec is to show the robustness of the part in applications where there may be GND bounce and the pin sees a "negative" voltage quickly for short amounts of time.

    I hope this answers your question!  If so, please press the green button; otherwise, feel free to follow up!

    Thanks,

    Aaron Grgurich