At the input of the LDO I have 70V. I put an NPN (PHPT61006NY) at the output of the tps7a4001 regulator to have a stronger current. Idle LDO with no load works as it should. once I put a 1kohm load at the output. the output voltage crashes; it goes from 61v to 50v. even the FB goes from 1.18v to 0.96V. Is this behavior normal? thank you in advance.