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Will TPS75105 work with 1.8V control for the two enables


My customer would like to know if the LED driver TPS75105DSK will work with 1.8V control for the two enables   Right now I they are driving it with 3.3V I/Os but are running short on 1.8V GPIOs and I need to remap those GPIOs from a 3.3V to a 1.8V bank….


The spec for the part has the VIH as 1.2 volts but that is assuming Vin = 3.8V.  In my case Vin = AVDD = 5V..    So I am not sure if the VIH will scale up with a higher VIN or if it is fixed at 1.2V.   In some parts the VIH levels

Are a percentage of the Vin voltage but your spec does not say anything about it.    Can TI please comment on feasibility of this implementation.


David Blankfield TI