What is 3.3V Vref in this circuit design of A6986? Do I need to supply 3.3V to this pin?

[LTunc.1]

https://eds.st.com/dcdc/

I want 9-30V to 8V and I don't have any 3.3V voltage in my circuit. Is it okay if I don't connect anything here?

 

[Peter BENSCH · Accepted solution]

Welcome, @LTunc.1​, at the community!

The VREF pin is an output and can be used to supply external circuitry with a reference voltage of 3.3 V + -3%, max 5mA, as stated in the datasheet, table 4.

So no, you don't need to apply a 3.3V voltage to this pin, you are not allowed to either.

Good luck!

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

/Peter

[LTunc.1]

Thanks Peter, you've helped me a lot.