Parallel two TPS2115A to get a higher current output
You could probably do this, the problem is if you did, a way would be needed to make sure you don't send more than 2A through one TPS2215A. The other problem is matching between devices, if one device has say 10% more resistance, then the other device would conduct more current and dissipate more heat.

But TI also has a TPS2120 that is rated for 3A which would be an easier solution.