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The VFB is typ 500mV(±10mV) at Ta=25℃ in datasheet.
Could you tell me the VFB over temperature?
2.
Is the L1 of equation (3) and (4) the maximum average inductor current?
3.
It is written that "6-pin thin SOT package (DDC) is RθJA = 130°C/W" and "Specified regulator operation is assured to a maximum ambient temperature TA of 85°C" in 10.3 Thermal Considerations,.
But RθJA is 139.1℃ in thermal information and Ta_max is 105℃ in Recommended Operating Conditions.
Which is correct respectivity?
Is the PD(max) of equation(8) max loss to be able to lose in specified Ta?
1. i can't answer this question now. i need to find more information.
2. the L1 is the inductance. i would suggest using 4.7uH for your application. there is no improvement in performance with 10uH.
3. this chapter is to explain how to estimate the junction to make sure it is not higher than 125oC. Actually the ambient temperature is not important, just ensure the the junction temperature below 125oC. by the way, the actual "RθJA " depend on the real layout and wind condition.
