TL/H/7380 – 1
FIGURE 1
GENERAL OPERATING CHARACTERISTICS
The output current of the LM380 is rated at 1.3A peak. The
14 pin dual-in-line package is rated at 35
§
C/W when sol-
dered into a printed circuit board with 6 square inches of 2
ounce copper foil (
Figure 2 ). Since the device junction tem-
perature is limited to 150
§
C via the thermal shutdown circuit-
ry, the package will support 3 watts dissipation at 50
§
C am-
bient or 3.7 watts at 25
§
C ambient.
Figure 2 shows the maximum package dissipation versus
ambient temperature for various amounts of heat sinking.
TL/H/7380 – 2
FIGURE 2. Device Dissipation vs Ambient Temperature
Figures 3a, b, and c show device dissipation versus output
power for various supply voltages and loads.
TL/H/7380 – 3
FIGURE 3a. Device Dissipation
vs Output Power Ð 4
X
Load
TL/H/7380 – 4
FIGURE 3b. Device Dissipation
vs Output Power Ð 8
X
Load
TL/H/7380 – 5
FIGURE 3c. Device Dissipation
vs Output Power Ð 16
X
Load
2
