l4995r STMicroelectronics, l4995r Datasheet - Page 22

• Manufacturer Part Number: l4995r
• Description: 5v, 500ma Low Drop Voltage Regulator
• Manufacturer: STMicroelectronics

Package and PCB thermal data
4.2
Note:
22/33
PowerSSO-24™ thermal data
Figure 34. PowerSSO-24™ PC board
Layout condition of R
area= 77mm x 86mm,PCB thickness=1.6mm, Cu thickness=70µm (front and back side)
Thermal vias separation 1.2 mm, Thermal via diameter 0.3 mm +/- 0.08 mm, Cu thickness
on vias 0.025 mm, Footprint dimension 4.1 mm x 6.5 mm ).
Figure 35. R
RTHj_amb(°C/W)
55
50
45
40
35
30
0
thj-amb
th
Vs. PCB copper area in open box free air condition
and Z
2
th
measurements (PCB: Double layer, Thermal Vias, FR4
PCB Cu heatsink area (cm^2)
4
6
8
10
L4995