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EM2130L02QI fault output

DV3
Beginner
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We have a design using 4 EM2130L02QI dc/dc converte all with very similar routing and component placement. the output gets shorted to GND and never changed . the same board that contain with another assembly batch was working.

We have used this regulator in multiple projects and it works the only change is the PCB assembly house and this is the first time we have seen such an issue !

Is there someone who can help us debug this issue ?

attaching the waveform output:

Input voltage : 12V(PVIN)

VCC:5V

CTRL/ENABLE=3.3V

you can see clearly that VOUT EVEN DOESNT CHANGE!

DV3_0-1652102200153.jpeg

power off

DV3_2-1652103544429.jpeg

 

layout:

DV3_1-1652103519919.png

 

SCHEMATIC:

DV3_3-1652103659462.png

Please help.

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