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Dear team,
My customer used this device in their system, and the condition is Vin=5V, Vout=3.3V, Iout=500mA. When they test this device's surface temperature with thermocouple under 75°C high ambient temperature, they found that this surface temperature is up to 108°C. The max junction temperature is 125°C in the datasheet. If 108+ψJT*(5-3.3)*0.5<125, it is ok. But if the result >125, this chip maybe damaged. But now I can't find the value of ψJT in the datasheet, so I am not sure whether 108°C is too high for this device.
Thanks & Best Regards,
Sherry
Hi Sherry,
Here are the thermal numbers for this device:
So based on the above, the die temp should be 108.6C.
I hope this answers your question.
