L5983_08 Datasheet, PDF (31/37 Pages) STMicroelectronics – 1.5 A step-down switching regulator

Application information
L5983
Figure 22. Junction temperature vs output
current
Figure 23. Junction temperature vs output
current
Figure 24. Junction temperature vs output
current
Figure 25. Efficiency vs output current
95
Vo=5V
90
Vo=3.3V
85
Vo=2.5V
80
75
VCC=12V,
FSW=250kHz
70
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
Io [A]
Figure 26. Efficiency vs output current
94
92
Vo=3.3V
90
88
Vo=2.5V
86
84
82
Vo=1.8V
80
VCC=5V,
78
FSW=250kHz
76
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
Io [A]
Figure 27. Efficiency vs output current
95
Vo=2.5V
90
85
Vo=1.8V
80
Vo=1.2V
75
VCC=3.3V,
FSW=250kHz
70
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Io [A]
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