Other Parts Discussed in Thread: LMV7275,
I have the following schematic The problem is with R140 and R141 changed to 0 ohms and a common mode resistance of 57k (typ) in the comparator the buck regulator APPEARS to charge. It does not charge when disconnected to the comparator circuit but remains at a steady 0.4V which is what I want. When connected to the comparator - whether ignoring the state of the enable signal- it charges to a voltage of 2.1V. The 300mV reference stays at 0.3V. Just curious what is happening and if there is a fix to maintain 0.4V. and use the comparator (In later designs I am using the LMV7275 but it has a different pinout than this comparator footprint). The datasheet says that if there is a leakage path the voltage will be incorrect. Which might be what's happening but I can't simulate it.
