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We have done some investigation in using COTS components for low orbit space usage. As a part of this we have done some TID radiation testing of one of our standard designs.
The TID (Total Ionizing Dose Radiation Testing) is performed using gamma rays provided by a JLS 81-22 Cobalt-60 source.
The design includes 3x TPS7A8801RTJT LDO’s. All of them failed at more or less the same time, and they were the only components failing. The failed around a total dose of 12krad.
We know that these LDO are COTS and not space rated (TPS7A8801RTJT).
But is it possible to get some feedback from TI in relation to what the suspected/expected failure mechanism would be, if these LDO’s were exposed to radiation.
We are kind of curious since they have an unusual failing pattern.
Each LDO contains 2 outputs. The 3 LDO’s are placed different places on the board and connected to different sources and loads. Still all 6 outputs failed more or less at the same radiation level.
More details about failure
Hey Henrik,
As a policy we don't comment on radiation effects on commercial products.
Thanks,
Daniel