Greetings! We need your assistance for the customer's inquiry below.
We are using LM3674 -adj version of the device in our design to generates 1.2V from 3.3V power supply. We have 280K and 200K as standard Feedback Resistors in design. The complete calculation is based on Vref of 0.5V. But the boards which we received from our Local CM show 0.6V as Vref and hence we have to change the feedback value to get 1.2V. The Value measured at pin 4 (FB) is 0.6V under fail condition. Changing the value to same R1 = R2, we got 1.2V what we expecting. However this is different from the datasheet and hence need your input on it.
We are looking forward to your response and thank you in advance for the support.