I have the LM5008A set up to regulate to 5v. I have the output period to be 7.75us and with the Rcl and Vfb, Toff minimum comes out to be 1.46us. Ton maximum becomes 6.29us which gives a Vin minimum of 6.165v.
I am seeing the output voltage track the input voltage up until the input reaches about 7.5-8v. The datasheet says it can handle a 6v input but I'm wondering if 5v is too high for the it to operate at the 6.165v Vin minimum I have calculated. Is this a correct assumption?