E-L5973AD Datasheet, PDF (15/22 Pages) STMicroelectronics – 2 A switch step down switching regulator

L5973AD
Additional features and protections
Figure 9. Junction temperature vs output
current
Figure 10. Junction temperature vs output
current
Tj(°C)
100
90
Vin=5V
80 _Tamb=25°C
70
60
50
40
30
20
0.2 0.4 0.6 0.8
Tj(C)
110
Vo=3.3V
Vo=2.5V
100
90
Vin=12V
Tamb=25°C
80
Vo=1.8V
70
60
50
40
30
20
1 1.2 1.4 1.6 1.8 2
Io(A)
0.2 0.4 0.6 0.8
Vo=5V
Vo=3.3V
Vo=2.5V
1 1.2 1.4 1.6 1.8 2
Io(A)
Figure 11. Efficiency vs output current
Figure 12. Efficiency vs output current
95
90
85
Vout=3.3V
80
75
Vin=5V
70
Vout=2.5V
Vout=1.8V
65
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
Io(A)
95
90
Vout=5V
85
80
Vout=3.3V
75
70
Vin=12V
Vout=2.5V
65
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
Io(A)
Doc ID 9552 Rev 9
15/22