LM317L: Request for Thermal Resistance

Renan Santos Adriano

Part Number: LM317L

Hi Team,

My customer would like to know if we can provide the thermal resistance of LM317LIPK.

1) Thermal Resistance (Junction to case) (top) °C/W
2) Thermal resistance (Junction to ambient) °C/W
3) Thermal resistance (Junction to Case) (bottom) °C/W
4) Thermal resistance (Junction to board) °C/W

Looking forward to your response.

Regards,

-Renan

over 6 years ago

0 Ryan Eslinger over 6 years ago

TI__Guru 55940 points

Hi Renan,

LM317L is an older device that was released before it was common to place all of these thermal metrics in the datasheet. It does not appear that the full thermal modeling was performed on this family to date. I will submit for the thermal information on this device. Please allow for up to two weeks for the modeling to be completed.

In the meantime, please note that with any linear regulator board layout will have a big impact on the thermal performance. Our standard thermal information is modeled on a JEDEC Hi-K board in order to provide a standardized layout and measurement technique for comparison purposes. The following Application Report goes into detail on how board layout impacts the thermal performance of linear regulators.

www.ti.com/.../slvae85.pdf

Very Respectfully,
Ryan

0 Renan Santos Adriano over 6 years ago in reply to Ryan Eslinger

TI__Mastermind 22380 points

Hi Ryan,

I will wait for the result of your submitted request for Thermal Resistance data.

Thanks,

-Renan

0 Ryan Eslinger over 6 years ago in reply to Renan Santos Adriano

TI__Guru 55940 points

Hi Renan,

There is a high volume of thermal models in the currently. I will update you as I receive additional information.

Very Respectfully,

Ryan

0 Ryan Eslinger over 6 years ago in reply to Ryan Eslinger

TI__Guru 55940 points

Hi Renan,

The Thermal Modeling was completed today:

Theta JA	45.4 C/W
Theta JC, top	90.4 C/W
Theta JB	9.9 C/W
Psi JT	5.9 C/W
Psi JB	9.7 C/W
Theta JC, bottom	7.9 C/W

Very Respectfully,

Ryan

0 Renan Santos Adriano over 6 years ago in reply to Ryan Eslinger

TI__Mastermind 22380 points

Hi Ryan,

Thank you for your support, appreciate it.

Regards,

-Renan

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LM317L: Request for Thermal Resistance