LM317M thermal resistance

David Gibbs

Other Parts Discussed in Thread: LM317A

Is the thermal resistance (J-A) of the DCY package accurate? It shows 60.2 but the LM317A datasheet shows 140 for the same package. Also, what are Theta J-A and J-C for the KVU package? This data is not shown. Thanks!

over 10 years ago

0 Ron Michallick over 10 years ago

TI__Guru**** 164976 points

David,

I will make a request for the thermal model data. The results should be back in less than 1 week.

0 Ron Michallick over 10 years ago in reply to Ron Michallick

TI__Guru**** 164976 points

David,

Here are the result specific to this device.

LM317MDCY
Theta JA-High K 60.2 C/W
Theta JC, top 42.0 C/W
Theta JB 9.4 C/W
Psi JT 3.4 C/W
Psi JB 9.3 C/W

LM317MKVU
Theta JA-High K 56.9 C/W
Theta JC, top 36.1 C/W
Theta JB 29.3 C/W
Psi JT 3.8 C/W
Psi JB 28.8 C/W
Theta JC, bot 1.8 C/W

0 David Gibbs over 10 years ago in reply to Ron Michallick

Prodigy 180 points

Ronald - thank you very much!

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LM317M thermal resistance