Our customer used the TPS7A8001 in a manner shown in this training video: https://training.ti.com/voltage-regulator-margining-precision-dacs . According to our customer,
Importantly, I need the output of the LDO to be controlled from 0 V to 1.8 V, and I typically have the output of the LDO set to 0.5 V. I followed the design instructions in the above link, and set R1 to 13000 ohms, R2 to 7500 ohms, and R1 to 12400 ohms. I have confirmed that the voltage coming from the DAC is stable. I have also placed a 1kOhm resistor, two 10uF capacitors, and one 1nF capacitor load at the LDO output. The setup is placed in a climate controlled room.
The issue I am facing is that the output voltage drifts, on the order of 2-4 mV over an hour long period. Is there any way to make the output stable?