L5970D
Figure 1. Junction Temperature vs. Output
Current (SO8) *)
Tj(°C)
Figure 4. Load Regulation
Vo (V)
3.312
3.308
Vcc = 12V
Vo = 3.3V
Tj = 25°C
3.304
3.3
3.296
3.292
3.288
3.284
3.28
3.276
0
0.5
Io (A)
1
1.5
Tj = 125°C
130
120
110
100
90
80
70
60
50
40
30
20
0.2
Vo=3.3V
Vo=2.5V
Vcc=5V
Tamb=25°C
Vo=1.8V
0.4
0.6
0.8
Io(A)
1
1.2
1.4
1.6
Figure 5. Line Regulation
Figure 2. Junction Temperature vs. Output
Current (SO8) *)
Tj(°C)
Vo (V)
3.312
3.308
3.304
3.3
3.296
3.292
3.288
3.284
3.28
3.276
0
10
20
Vcc (V)
30
40
Tj = 125°C
Vcc = 12V
Vo = 3.3V
Tj = 25°C
130
120
110
100
90
80
70
60
50
40
30
20
0.2
Vo=5V
Vo=3.3V
Vcc=12V
Tamb=25°C
Vo=2.5V
0.4
0.6
0.8
Io(A)
1
1.2
1.4
1.6
Figure 3. Junction Temperature vs. Output
Current (SO8) *)
Tj(°C)
Figure 6. Output Voltage vs. Junction
Temperature
Vo (V)
1.25
1.24
1.23
140
Vo=18V
Vo=12V
120
100
80
60
40
20
0
0.2
0.4
0.6
0.8
Io(A)
Vcc=24V
Tamb=25°C
Vo=5V
1.22
Vcc = 12V
1.21
1.2
-50
1
1.2
1.4
Vcc=12V
0
50
Tj (°C)
100
150
*) Package mounted on demoboard
4/10
STMICROELECTRONICS [ STMICROELECTRONICS ]
