Datasheet

ST1S09 Typical performance characteristics
Doc ID 13632 Rev 4 9/18
Figure 9. Line regulation vs. temperature Figure 10. Load regulation vs. temperature
Figure 11. PWM Switching frequency vs.
temperature
Figure 12. Maximum duty cycle vs.
temperature
Figure 13. Under voltage lock out threshold
vs. temperature
Figure 14. Efficiency vs. output current
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
line [%V
O
t/ΔV
I
]
V
O
@1.2V V
I
= from 2.7V to 5.5V, I
O
= 100mA
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
line [%V
O
t/ΔV
I
]
V
O
@1.2V V
I
= from 2.7V to 5.5V, I
O
= 100mA
-0.5
-0.3
-0.1
0.1
0.3
0.5
0.7
0.9
1.1
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
load [%V
O
/ΔI
O
]
V
O
@1.2V
V
I
= 5V, I
O
from10mA to 2A
-0.5
-0.3
-0.1
0.1
0.3
0.5
0.7
0.9
1.1
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
load [%V
O
/ΔI
O
]
V
O
@1.2V
V
I
= 5V, I
O
from10mA to 2A
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
-75 -50 -25 0
25
50 75 100 125 150 175
T [°C]
PWM freq.[MHz]
V
I
=5V, V
FB
=0.6VV
O
@1.2V
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
-75 -50 -25 0
25
50 75 100 125 150 175
T [°C]
PWM freq.[MHz]
V
I
=5V, V
FB
=0.6VV
O
@1.2V
V
O
@3.3V
70
72
74
76
78
80
82
84
86
88
90
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Dmax[%]
V
I
=5V, V
FB
=0.6VV
O
@3.3V
70
72
74
76
78
80
82
84
86
88
90
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Dmax[%]
V
I
=5V, V
FB
=0.6V
V
O
@1.2V
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
UVLO [V]
I
O
=10mA
V
O
@1.2V
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
UVLO [V]
I
O
=10mA
25
35
45
55
65
75
85
95
0 500 1000 1500 2000
Iout [mA]
Efficiency [%]
V
IN
=5V
V
O
=1.2V
V
O
=3.3V