LM26420: Can I combine two output of LM26420?

Dear team, 

1. As mentioned title, Can I combine 2 output for large current up to 4A? 

Currently the customer are using LM26420 3 points for their system. but in case of 3.3V, they need up to 4A current. so they want to same device for 3.3V. 

Is this concept available?

2. How about TPS62442? 

Is this device available to combine 2 output for 4A current output?  

Thank you.