L5973D
Figure 10. Junction Temperature vs. Output
Current (V
CC
= 5V)
Tj(°C)
120
110
Vin=5V
100
Tamb=25°C
90
80
70
60
50
40
30
20
0.2 0.4 0.6 0.8 1
Figure 12. Efficiency vs. Output Current
(V
CC
= 5V)
95
93
91
89
87
85
83
81
79
77
75
73
71
69
67
Vo=3.3V
Vo=2.5V
Vo=3.3V
Vo=1.8V
Efficiency (%)
Vo=2.5V
Vo=1.8V
Vcc=5V
1.2 1.4 1.6 1.8 2 2.2 2.4 2.6
Io(A)
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3
Io (A)
Figure 11. Junction Temperature vs. Output
Current (V
CC
= 12V)
Tj (°C)
120
110
100
90
80
70
60
50
40
30
20
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
Io (A)
2
2.2 2.4 2.6
Vo=2.5V
Figure 13. Efficiency vs. Output Current
(V
CC
= 12V)
91
89
87
85
83
81
79
77
75
73
71
69
67
65
Vin=12V
Tamb=25°C
Vo=5V
Vo=3.3V
Vo=5V
Vo=3.3V
Vo=2.5V
Efficiency (%)
Vcc=12V
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3
Io (A)
7/10
STMICROELECTRONICS [ STMICROELECTRONICS ]
