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TPS7A20: Not expected Output voltage

Genius 9880 points
Part Number: TPS7A20

Hi Team, 

Good  day, we have received query from customer and want to confirm about the output of  TPS7A20. For me to not miss any information, Ill copy the query below.

"Hello Team, I am using the above mentioned part for one of my application measurement. Please refer attachment for my application schematic. I had given 5V as Vin and expecting around 4.5V as Vout. When C2 is connected, I am observing Vout as 1.209V and when C2 is unpopulated I observed Vout around 4.3V. And also ,when I am connecting a load to OUT pin (pin no.5) without populating C2, I am observing around 1.2V as Vout. Could you please let me know, why it is happening like this and what could be the solution for this?"

Schematic:  

Thank you and looking forward for your kind response.

Regards,

Maynard