The threshold varies based on the Vin/Vout ratio – furthermore on a battery application, the decaying Vin will change that threshold as well.
For MAX77827, overall that threshold is within 100mA to 300mA…
The FPWM pin is a digital input pin and leaving it floating can be a problem as you will not be sure about the state of the pin. If you are not planning to use Forced PWM functionality and want to use…
The two pins in middle of the package are POK and FPWM:
POK is open drain, yes, you can keep it float if not used.
FPWM has a ~800kohm pull down resistor, float will set the part in auto skip mode…