E-L5970D Datasheet, PDF (7/16 Pages) STMicroelectronics – Up to 1A step down switching regulator

L5970D
4
Typical characteristics
Typical characteristics
Figure 3. Junction temperature vs
output current
Figure 4. Load regulator
Tj(°C)
Vo (V)
130
120
110
100
90
Vcc=5V
Tamb=25°C
80
Vo=3.3V
Vo=2.5V
Vo=1.8V
3.312
3.308
3.304
3.3
3.296
Vcc = 12V
Vo = 3.3V
Tj = 25°C
70
3.292
60
50
3.288
40
3.284
Tj = 125°C
30
3.28
20
3.276
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
0
0.5
1
1.5
Io(A)
Io (A)
Figure 5. Junction temperature vs
output current
Figure 6. Line regulator
Tj(°C)
Vo (V)
130
3.312
120
110
100
90
Vcc=12V
Tamb=25°C
80
70
60
50
40
Vo=5V ^Vo=3.3V
Vo=2.5V
3.308
3.304
3.3
3.296
3.292
3.288
3.284
Vcc = 12V
Vo = 3.3V
Tj = 25°C
Tj = 125°C
30
3.28
20
3.276
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
0
10
20
30
40
Io(A)
Vcc (V)
Figure 7. Junction temperature vs
output current
Tj(°C)
140
120
Vo=18V ^Vo=12V
100 Vcc=24V
Tamb=25°C
80
Vo=5V
60
40
20
0
0.2 0.4 0.6 0.8
1
Io(A)
1.2 1.4
Figure 8. Output voltage vs junction
temperature
Vo (V)
1.25
1.24
1.23
1.22
1.21
1.2
-50
Vcc = 12V
Vcc=12V
0
50
100
150
Tj (°C)
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