What to look out for when adding a DAC to a DC/DC converter feedback ?

[chipeater]

Hello,

I would like to add a DAC to the feedback of a DC/DC converter to adjust its output voltage via a microcontroller.
I have already tried this type of setup with an LM3150 and a LTC2601 but I had a lot of problems (the DCDC did not start every time or stopped for no apparent reason, I had no problem without the DAC).

I would like to renew the experience with a TPS62933 for example.
The idea is to create an adjustable power supply from 3V to 15V from 24V.
Are there any features to look at on the DAC or the DC/DC to implement this configuration ?
Do you have a DAC part to recommend for this ?

At first, I was inspired by this : https://www.fischl.de/dcdccontrol/

Thank you very much 

[Terry Bites]

Have a read:
www.analog.com/en/technical-articles/a-3step-approach-for-designing-a-variable-output-buck-regulator.html