16P QFN Voltage Regulator Thermal Resistance Model

Applications
1

MPQ8636GLE-10 voltage step from 4.5V to 18V; expected thermal output of 1W; theta J-C 9

I am modeling this component and am looking for some clarity on what case the datasheet’s theta J-C is referencing. Is the 9C/W referring to the resistance to the top side of the component or the board side of the component? If this is referencing the top side, what value can we expect for theta junction to board?

Thanks!

2

Hi Christopher,

I am looking into this and will get back to you.

Best Regards,
Yu Honda

3

Hi Yu,

Are there any updates related to this question?

Thanks!
Chris

4

Hi Christopher,

Thank you for your patience. This link below goes in depth on what it refers to as well as how those values can be calculated.
Understanding Datasheet Thermal Parameters and IC Junction Temperatures | Article | MPS (monolithicpower.com)

Best Regards,
Yu