This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM7321: SOT-23 5pin Junction-to-ambient thermal resistance

Part Number: LM7321

Dear, support team.

Our customer has a question on θjc in a 5pin SOP-23 package.
It has different θja in the model number even in the same DBV0005A Package.

LM7321MF/NOPB  θja 325/W
OPA189IDBVR    θja 134.5/W
LMP7701MF/NOPB  θja 122.9/W
LM7341MF/NOPB  θja 325/W

When I checked the application report "SPRA953C", it was found that it was consumed by the test board with 1.1 Usage on page 2.
Semiconductor and IC Package Thermal Metrics (Rev. C) (ti.com)


I explained to the customer that the condition of the test board was different.
Additional questions from the customer is the test condition of θja for the 4models.
Please tell me the test condition of θja of each model.

Best Regards,
Hiroaki Yuyama