I am currently designing a CPU board in which I use the MP8758HGL DC/DC converter for a microprocessor core power supply (up to 8Amp). As I am going to manufacture some prototypes, I want to measure the real processor’s core power consumption for our application. For that, I have a shunt resistor (R152 - 0.01R) in converter’s output (after the inductor and output capacitors). My questions are:
1.- Should I take the voltage after that shunt resistor for the feedback signal and for converter’s VOUT pin?
2.- Why do we need the VOUT signal in the MP8758HGL converter? I suppose that the output voltage is set by the converter depending on the values of the FB pin resistor divider. The datasheet says that VOUT pins are for outputs Vsense. How does the converter know what is the output voltage?
Attached you can see a picture of my current design.
Thanks in advance,