Question: Can the MAX17201/05/11/15 REG2 & REG3 internal LDO's be used to supply external circuitry?
Answer: No, the internal LDO brought out on pin REG2 of the MAX172xx (& REG3 on MAX172x5) are meant for internal use only and have not been characterized to support external loads. These signals are only brought out to pins so a bypass capacitor can be connected to them.