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TPS628503: Thermal Resistance of TPS628503QDRLRQ1

Part Number: TPS628503

Tool/software:

I looked at the datasheet and calculated the heat output.

The thermal resistance values ​​shown on the datasheet are as follows:

According to this, the thermal resistance should be calculated at 110℃/W.

However, Power Designer estimates it at 60°C/W.

I understand that 60°C/W is an EVM (evaluation board), but I would like to know which thermal resistance should be used when making estimates.