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TRS3122E: Current on VL?

Chip Weller
Prodigy 150 points
Part Number: TRS3122E

I am looking at using the TRS3122E on a 1.8V based logic system so I can avoid additional voltage translators. I will be running the Vcc off of 3.3V. Figure 1 of the datasheet allows me to estimate the current from Vcc, which should be the majority of the power required. I was surprised that the current requirements on VL, the logic supply voltage, is not shown anywhere.

What current should I plan on for VL?

Thanks

  • 0
    TI__Expert 6955 points
    Chip,

    The VL supply goes to IO blocks (CMOS buffers) therefore the static power consumption should be small and most likely on the micro-amp scale. How much current can the power supply source?

    -Lucas
  • 0 in reply to Lucas Schulte9
    Prodigy 150 points
    I am in the process of designing the system supplies and was trying to assure adequate current is available. I will probably budget 1 mA (which will be in the noise) for this function. I am assuming VL must also supply drive current for the 1.8V outputs, which will be the majority of the current into the VL pin.