I am using this Buck Converter to generate 3.3V output at 0.45A with Switching frequency of 2.1MHz.
Input voltage range is 6V - 16V. LM63625 2.5A Part is selected.
My questions :
Question 1:
In the datasheet, table 9.2 gives the value of the inductor and capacitors to be used. But there's this TI App Note for Buck Converter which helps to calculate the inductor value in section 3.
The Buck converter datasheet recommends to use 2.2uH inductor, whereas if I use the formula from the TI App Note, (considering 20% ripple current), I get an inductor value between 11uH to 13uH.
My question is why is there a difference between 10uH between the said value in the datasheet and the formula from the TI App Note? Which one should I follow?
Question 2:
Can someone tell me what would the maximum voltage across the Cboot capacitor 220nF? And how is it calculated?