Help identify SOT23-6 linear voltage regulator "L9B"

[Bigwolf]

Help identify a linear voltage regulator, SOT23-6, marking "L9B".

Pinout:
1 OUT...6 EN(High = ON)
2 IN....5 FB(R1/R2)
3 NC?...4 GND

Used as a 9V to 5V voltage regulator and I need some replacement with matching pinout.

 

[jean-paul]

ADP3331