Other Parts Discussed in Thread: XTR105
XTR305 has been configured as per figure 40 of the datasheet with V+ at +24V, V- at -5V and logic supply at +3.3V. M1 tied to DGND with M2 and OD\ being controlled by a PIC microcontroller. Ciruit works as expected in current and voltage mode except the overtemperature flag output EFOT being unstable and becomes stable only with a very low value pull-up resistor in the range of 13Ω - 15Ω. i.e. 22mA to 25mA current drain. Why?
Overtemperture flag output EFOT without any pull-up resistor
Overtemperture flag output EFOT with 1kΩ pull-up