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Calculated Junction temperature between TPS5410 & tps5430

Other Parts Discussed in Thread: TPS5410

When we designed the two application circuitries with the same conditions(for example, VIN=12V, VO=3.3V, IO=1A) by using TPS5410 AND 5430,

IC power and the calcilated IC junction temperature ware showen as the same value(PD=188mW,Tj=30degC) for both devices on STRESS sheet.

But the package for both devices is different and it means that the thermal resistance is different(8PIN-D for 5410, 8pin DDA for 5430).

So the IC junction temperature should be different between both devices. Please corrent it.