ST1S09 STMicroelectronics, ST1S09 Datasheet - Page 10

• Manufacturer Part Number: ST1S09
• Description: Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator
• Manufacturer: STMicroelectronics

Specifications of ST1S09

• Typical Efficiency: > 90%
• Two Versions Available: power good or inhibit
• Non Switching Quiescent Current: (typ) 1.5 mA over temperature range

Typical performance characteristics
10/18
Figure 15. Efficiency vs. temperature
Figure 17. Over voltage protection vs.
Figure 19. Load transient
V
I
= 5 V, V
C
1.4
1.4
1.3
1.3
1.2
1.2
1.1
1.1
0.9
0.9
0.8
0.8
100
100
I
95
95
90
90
85
85
80
80
75
75
70
70
65
65
60
60
55
55
50
50
45
45
40
40
1
1
= 4.7 µF, C
-75
-75
-75 -50 -25
-75 -50 -25
O
Resistor 1.2kΩ from V
Resistor 1.2kΩ from V
V
V
-50
-50
= 1.2 V, I
SW
SW
=0.8V
=0.8V
temperature
-25
-25
O
V
V
= 22 µF
O
O
=3.3V
=3.3V
O
= 100 mA to1 A, L = 3.3 µH,
0
0
0
0
OVP ON
OVP ON
V
V
25
25
I
I
25
25
=5V, I
=5V, I
I
I
and V
and V
T [°C]
T [°C]
T [°C]
T [°C]
50
50
V
V
O
O
50
50
=100mA
=100mA
I
I
=5V, V
=5V, V
SW
SW
75
75
75 100 125 150 175
75 100 125 150 175
O
O
V
V
=3.3V, C
=3.3V, C
O
O
=1.2V
=1.2V
100 125 150 175
100 125 150 175
FB
FB
=100nF
=100nF
Doc ID 13632 Rev 4
V
V
I
I
O
O
O
O
Figure 16. Over voltage protection vs.
Figure 18. Over voltage protection hyst. vs.
Figure 20. Inhibit transient
V
I
= 5V, V
C
1.4
1.4
1.3
1.3
1.2
1.2
1.1
1.1
0.9
0.9
0.8
0.8
14
14
12
12
10
10
8
8
6
6
4
4
2
2
0
0
O
1
1
-75
-75
-75
-75
= 22 µF, V
INH
Resistor 1.2kΩ from V
Resistor 1.2kΩ from V
V
V
Resistor 1.2kΩ from V
Resistor 1.2kΩ from V
V
V
-50
-50
-50
-50
SW
SW
SW
SW
= 0 to 2 V, I
=1.2V
=1.2V
=0.8V
=0.8V
temperature
temperature
-25
-25
-25
-25
O
= 3.3 V
0
0
0
0
O
OVP ON
OVP ON
= 2 A, L = 3.3 µH, C
25
25
25
25
OVP ON
OVP ON
I
I
I
I
and V
and V
and V
and V
T [°C]
T [°C]
T [°C]
T [°C]
50
50
50
50
V
V
V
V
I
I
I
I
=5V, V
=5V, V
=5V, V
=5V, V
SW
SW
SW
SW
75
75
75
75
O
O
O
O
=3.3V, C
=3.3V, C
=3.3V, C
=3.3V, C
100 125 150 175
100 125 150 175
100 125 150 175
100 125 150 175
I
= 4.7 µF,
FB
FB
FB
FB
=100nF
=100nF
=100nF
=100nF
ST1S09
V
V
V
V
I
I
O
O
INH
INH
O
O