Is VDD Output Voltage of 1.9V possible?

[jtrovato]

Hello, 

I am modifying an existing custom board with a sensor that requires exactly 1.9V VDD. Previously I was configuring REGOUT0 = UICR_REGOUT0_VOUT_2V1 but I was surprised to see that the only options are at 0.3V intervals. Since I have already printed proto PCBs under the assumption that I could configure this value, I would love some ideas on hoe to get the output VDD to be 1.9V. I would entertain hardware bodges or software solutions. Anyone have any ideas?

[Turbo J]

You forgot to include how much tolerance is allowed in the voltage.

Hard to give a recommendation without looking at the schematic and layout even with this data.

[jtrovato]

supply noise spec for the sensor is 100mV peak to peak. While VDD range is 1.8V to 2.1V with recommended value at 1.9V. I have been told that I will see degraded performance at the edge of this range which is why I want to get VDD to 1.9V. The schematic is very simple. I have the nrf52840 set up in high voltage mode with ~4.5V input. Then I configure the REG OUT stage to output my VDD for most components on the board that are generally 1.8V -3.3V tolerant. This particular sensor has 10uF and 100nF decoupling caps on VDD, and VDD is connected to the nrfs VOUT of DCDC0 also with the recommened decoupling caps.