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How to calculate the voltage Vout2?



Please take a look at the following circuit.

Buck Regulator : LMR23630

See the circuit in the blue-rectangle. When it measures, Vout3 = 5 V. So obviously Vout2 would be greater than 5 V. I am trying to figure out how this circuit will work and how to calculate the voltage Vout2 theoretically. Coupled inductor (N1=N2) inductance is 10µH.

I was referring the this document: snva674c.pdf

But as per this reference, Vout is calculated with reference to ground. But as per above circuit shared, it is shown as referenced to 3.3V. Kindly advice how to modify equation to find Vout2?