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TPS23753A: PMP8803 TL431 alternative

Pjs
Intellectual 880 points
Part Number: TPS23753A
Other Parts Discussed in Thread: PMP8803, TL431LI

Hi, 

Is it possible to use TL431LIBCDBZ as an alternative to U3 TL431ACDBVR in PMP8803? 

I'm using the TL431LI part elsewhere in my design so I'd like to use this throughout. With the exception of the pinout/package differences, is it a drop in replacement and would there be any other changes in performance I'd need to test for? 

Many thanks