The MAX77756 recommend to use Bottom Feedback Resistor to be 100Kohms or Lower. Can I use higher than this?

Answer: The 100KΩ maximum recommendation primarily addresses the FB pin offset current, which typically measures around 0.02µA but can fluctuate. If the Output Voltage (Vo) accuracy requirement has some leeway, using higher values is acceptable. For instance, a 200KΩ resistor will double the accuracy tolerance compared to a 100KΩ resistor. However, higher impedance nodes are more susceptible to noise coupling. Therefore, it's important to keep feedback resistors close to the IC and away from noise sources.

How to reduce the current consumption of MAX77756 output voltage feedback resistor divider?

Answer: To minimize the current consumption of the voltage divider feedback resistor, opt for a higher total resistance in the resistor network. For Example: A 10V output setting, following the equation from datasheet. Rbot = 10Kohms, Rtop = 90Kohms, Current consumption is 100uA. Rbot = 50Kohms, Rtop = 450Kohms, Current consumption is 20uA. Base on the above sample design, higher resistance leads to lower current consumption.