On LT3085 typical app combo: hi-current with hi-efficiency

Question

Hi, 
 In the datasheet of LT3085 , here are 2 typical application circuits. 
 Page 17: 
 
 Page 22: 
 
 So can they be a conbination? Namely, employ one LT3085 chip plus PNP amplifier, instead of four LT3085 chips parallel. To accomplish a higher current output. Here please despite whether the buck chip is able to afford a 5A load or ot. 
 Thanks a lot. 
 Highest Regards. 
 Jeronym Law

MichaelWu · Accepted Answer

Hi Jeronym, 
 Technically yes, you could do as you mentioned. But the output of the LTC3414 is limited to only 4A so you will not be able to achieve the 5A output of the single LT3085 high current application. 
 Best regards, 
 Michael)

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On LT3085 typical app combo: hi-current with hi-efficiency