How can TI have such a low R_thetaJA? Are they measuring it differently? I am looking at the specs for the TO-220 package. Usually I see the TO-220 having about 55 to 65 degC/W. When they say JESD 51-5 are they saying that they mount it on the horizontally? Isn't this just for getting the junct-case number?
Any insight would be appreciated.