θja and Ψjt of NJM78L00S series?

LDO Linear RegulatorsSpec

	θja (°C/W) 2 Layers	θja (°C/W) 4 Layers	Ψjt (°C/W) 2 Layers	Ψjt (°C/W) 4 Layers
NJM78L00SU3 (SOT-89-3)	215	58	43	19

θja ; Thermal resistance between junction and atomosphere
Ψjt ; Thermal parameter between junction and package surface
Mounted on glass epoxy board. (76.2 x 114.3 x 1.6mm: based on EIA/JEDEC standard, 2Layers)
Mounted on glass epoxy board. (76.2 x 114.3 x 1.6mm: based on EIA/JEDEC standard, 4Layers)