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LM5019: Issue facing while using this part

Part Number: LM5019

Hello TI Team,

We need urgent support on LM5019 part as it is not behaving properly. 

 

Below were the problems which we are facing while using LM5019 - 

1) When we am varying input voltage(14v-30v) output voltage is not stable it is increasing (10.5-10.9).

----- we am using this application for voltage regulator.My output requirement is 10V/50mA.

----- we have tuned output voltage to 10.5V. 

2) IC pins RTN and VIN getting short when we check in below mentioned format.

----- when we connect dc load with 50mA and if we apply input volatge (Vin and RTN) IC burned.

3) For your reference plz see below attached layout pdf.

 

Let Us know the issues which were causing the problem.

LM.pdf