If I have a LiPo battery with the maximum voltage of 12V and I want to use it to power a 5v(L7805) voltage regulator. Assuming the maximum current passing through the regulator is 500mA. From datasheet, the thermal resistance is 50°C/W.
Does that mean that it would generate a power loss of 3.5W and it would raise the voltage regulator's temperature by 175°C? The maximum operating temperature of the voltage regulator is 150°C. Would that means I need to drop the input voltage of the regulator?
Additional info from OP comments:
I am not able to get a switching regulator and the great power loss is not a concern. Would the thing work if I stack multiple voltage regulator together?