L5972D_0710 Datasheet, PDF (6/15 Pages) STMicroelectronics – 2A switch step down switching regulator

Typical characteristics
4
Typical characteristics
L5972D
6/15
Figure 3. Output voltage vs. junction Figure 4. Quiescent current vs.
temperature
junction temperature
Vo (V)
3.312
3.308
3.304
3.3
3.296
3.292
3.288
3.284
3.28
3.276
0
Vcc = 12V
Vo = 3.3V
Tj = 25°C
Tj = 125°C
0.5
1
Io (A)
Iq (mA)
2
1.8
1.6
Vcc = 12V
DC = 0%
1.4
1.2
1.5
-50
0
50
100
150
Tj (°C)
Figure 5. Line regulator
Vo (V)
3.312
3.308
3.304
Vcc = 12V
Vo = 3.3V
3.3
3.296
3.292
3.288
3.284
3.28
3.276
0
10
Tj = 25°C
Tj = 125°C
20
30
Vcc (V)
Figure 6. Shutdown current vs.
junction temperature
Ishd (µA)
70
60
Vcc = 12V
50
40
30
40
-50
0
50
100
150
Tj (°C)
Figure 7. Output voltage vs. junction Figure 8. Switching frequency vs.
temperature
junction temperature
Vo (V)
1.25
Iq (mA)
2
1.24
1.23
1.22
1.21
1.2
-50
1.8
1.6
Vcc = 12V
1.4
Vcc=12V
Vcc = 12V
DC = 0%
1.2
0
50
100
150
-50
Tj (°C)
0
50
100
150
Tj (°C)