Thermal resistance Case-Ambient value for LTC3308AEV (LQFN-10)

Question

Dear Sir, 
 Our customer would like to know about Thermal resistance value between Case(top) and Ambient, Theta CA, for LTC3308A in LQFN-10 lead package. Please advise. 
 Regards, 
 Koide

ADIApproved · Accepted Answer

Hi masaok, 
 We don't have this data readily available. If you insist on getting one, you may request through local ADI FAE. Can you tell me what is reason why you need this info other than theta-JA and theta-JC in datasheet? 
 Regards, 
 Nino)

masaok · Answer

Hi Nino, 
 Thank you very much for your reply. I understand the situation that theta-CA value is not available so far. Our customer would like to have it for their reference. Basically they will be able to calculate ambient temperature from theta-JA and power dissipation. 
 Regards, 
 Koide

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Thermal resistance Case-Ambient value for LTC3308AEV (LQFN-10)