I'm using a resistor divider, the fabulously low 0.55v reference, and "50mV" hysteresis to net a turn off and on point of the equivalent of 9.5v and 14.5v. It works very well.
However there could be a problem.
The datasheet shows a massive potential difference in the hysteresis which I need to understand. Would anyone know what can cause it to differ this much? I'm thinking possibilities are low Vdd, die temperature?