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running LM4951 slightly over max supply voltage - effects?

bowerymarc
Expert 1935 points
Other Parts Discussed in Thread: LM4951

this is kind of a reliability question.

The LM4951 is spec'd for 9V max operating voltage. What's the effect (or, is it even recommended) if it were to run slightly higher, say 1%, or 3%?  (around 9.1 or around 9.3V)?

The absolute max is spec'd as 9.5V but that's the 'instant death' voltage.

Thanks!
Marc

  • 0
    TI__Guru** 112755 points
    Hi Marc,

    VDD voltage must not trip over 9.5V in any case. If the voltage is between 9V and 9.5V the device should be able to work, although it may not work as the specifications in the datasheet.

    Best regards,
    -Ivan Salazar
    Texas Instruments
  • 0
    Genius 3295 points

    Hi Marc,

    Based on your question, I'm guessing you're looking to use the device with a battery? The open cell voltage of a battery always reads high on a DMM; there's no loading on the battery. In practical, actual use the cell voltage drops very quickly down to "9V" for a "9V battery". If it's something else, like a "battery pack" then testing under actual load is recommended to make sure the battery voltage is within the specified range. 

    Mike Tripoli