ST1S09IPU STMICROELECTRONICS [STMicroelectronics], ST1S09IPU Datasheet - Page 9

• Manufacturer Part Number: ST1S09IPU
• Description: 2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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