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TPS60403DBVR power issue

Other Parts Discussed in Thread: TPS60403, TL064

Hello 

We are working on TPS60403 to generate -5V as per attached circuit. We have used this in two products as below:

1) The load is only to bias a single TL064 OPAMP, product layout is small (~90mmx80mm). Here the device works fine without any issues.

2) The load is to bias two of TL064 OPAMP, product layout is large (~90mmx160mm). Here the device develops a short between input and output pins after few hours of operation. This issue is being observed on multiple boards.

There are no other loads on the output. On both boards the switching characteristics are same, ~ 266 kHz. Please let us know any inputs to debug the issue.

Thanks in advance

Regards

Kaushal