ST1S09(2007) 查看數據表（PDF） - STMicroelectronics
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ST1S09
(Rev.:2007)
(Rev.:2007)
STMicroelectronics
ST1S09 Datasheet PDF : 18 Pages
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ST1S09
Typical performance characteristics
Figure 9. Line regulation vs temperature
Figure 10. Load regulation vs temperature
1
0.8 VO@1.2V
0.6
0.4
0.2
VI = from 2.7V to 5.5V, IO = 100mA
0
-0.2
-0.4
-0.6
-0.8
-1
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
1.1
0.9
VO@1.2V
0.7
0.5
0.3
0.1
-0.1
-0.3
-0.5
-75 -50 -25 0
VI = 5V, IO from10mA to 2A
25 50 75 100 125 150 175
T [°C]
Figure 11. PWM Switching frequency vs
temperature
Figure 12. Maximum duty cycle vs
temperature
2
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
-75
VO@1.2V
-50 -25 0
VI=5V, VFB=0.6V
25 50 75 100 125 150 175
T [°C]
90
88
86
84
82
80
78
76
74
72
VO@3.3V
VI=5V, VFB=0.6V
70
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Figure 13. Under voltage lock out threshold Figure 14. Efficiency vs output current
vs temperature
4
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
VO@1.2V
3
-75 -50 -25 0
IO=10mA
25 50 75 100 125 150 175
T [°C]
95
85
75
65
55
45
35
25
0
VO=1.2V
VIN=5V
VO=3.3V
500
1000
1500
Iout [mA]
2000
9/18
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