E-L5970D Datasheet, PDF (8/16 Pages) STMicroelectronics – Up to 1A step down switching regulator

Typical characteristics
L5970D
Figure 9. Quiescent current vs
junction temperature
Iq (mA)
2
Figure 10. Switching frequency vs
junction temperature
Fsw (KHz)
260
1.8
250
1.6
Vcc = 12V
DC = 0%
1.4
240
230
Vcc = 12V
Vo = 3.3V
1.2
-50
220
0
50
100
150
-50
Tj (°C)
0
50
100
150
Tj (C)
Figure 11. Shutdown current vs junction Figure 12. Efficiency vs output current
temperature
Ishd (µA)
70
60
Vcc = 12V
50
40
30
-50
0
50
100
Tj (°C)
94
92
90
Vo=3.3V
88
86
84
Vo=2.5V
82
80
78
Vo=1.8V
76
74
Vcc=5V
72
70
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
150
Io (A)
Figure 13. Efficiency vs output current
92
90
Vo=5V
88
86
Vo=3.3V
84
82
80
78
Vo=2.5V
76
74
Vcc=12V
72
70
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Io (A)
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