In the electrical characteristics table of the MAX38902 datasheet, page 5, there is a spec called "Input Reverse Current Threshold," and it is 200mA typically. Later in the datasheet, the following paragraph can be found on page 10 in the Protection Features section:
The MAX38902A/B/C/D are also protected against reversen current when the output voltage is higher than the input. In the event that extra output capacitance is used at the output, a power-down transient at the input would normally cause a large reverse current through a conventional regulator. The MAX38902A/B/C/D include a reverse voltage detector that trips when IN drops 10mV below OUT, shutting off the regulator and opening the PMOS body diode connection, preventing any reverse current.
This paragraph states that when the output voltage is above the input voltage by more than 10mV, the MAX38902 will shut down. The "Input Reverse Current Threshold" of 200mA is actually represented by this 10mV drop. Internally, the MAX38902 uses a current sense resistor of 50mOhm. If 200mA passes through a 50mOhm resistor, there will be a 10mV drop. When this 10mV drop is sensed, the MAX38902 will shut off its internal pass FET.