ST1S12XX STMicroelectronics, ST1S12XX Datasheet - Page 12

• Manufacturer Part Number: ST1S12XX
• Description: Synchronous rectification with inhibit, 0.7 A, 1.7 MHz adjustable, step-down switching regulator
• Manufacturer: STMicroelectronics

Specifications of ST1S12XX

• Typical Efficiency: > 90%
• Not Switching Quiescent Current: max 650 μA over temperature range

Typical performance characteristics
12/20
Figure 10. Efficiency vs. temperature
Figure 12. Quiescent current vs. temperature
Figure 14. Enable voltage vs. temperature
100
100
510
510
490
490
470
470
450
450
430
430
410
410
390
390
370
370
350
350
90
90
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
1.8
1.8
1.6
1.6
1.4
1.4
1.2
1.2
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0
0
1
1
0
0
-75
-75
-75
-75
-75
-75
-50
-50
-50
-50
-50
-50
V
V
V
V
V
V
IN
IN
-25
-25
IN
IN
IN
IN
-25
-25
=V
=V
-25
-25
=V
=V
=5.5V, I
=5.5V, I
EN
EN
EN
EN
=3V, V
=3V, V
=3.6V, V
=3.6V, V
0
0
0
0
0
0
OUT
OUT
OUT
OUT
=10mA, C
=10mA, C
=1.2V
=1.2V
25
25
25
25
FB
FB
25
25
=0.65V, C
=0.65V, C
T [°C]
T [°C]
T [°C]
T [°C]
T [°C]
T [°C]
50
50
50
50
50
50
IN
IN
= C
= C
IN
IN
OUT
OUT
=C
=C
75
75
75
75
75
75
=10µF, V
=10µF, V
OUT
OUT
=10µF, No Switching
=10µF, No Switching
100
100
100
100
100
100
I
I
I
I
OUT
OUT
OUT
OUT
OUT
OUT
=700mA
=700mA
=100mA
=100mA
125
125
125
125
=1.8V
=1.8V
125
125
Doc ID 14314 Rev 5
150
150
150
150
150
150
ON
ON
OFF
OFF
175
175
175
175
175
175
Figure 11. Supply current vs. temperature
Figure 13. Enable voltage vs. temperature
Figure 15. Reference line regulation vs.
-0.2
-0.2
-0.4
-0.4
-0.6
-0.6
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
1.8
1.8
1.6
1.6
1.4
1.4
1.2
1.2
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0.6
0.6
0.4
0.4
0.2
0.2
-75
-75
-0
-0
1
1
0
0
-75
-75
-75
-75
-50
-50
V
V
-50
-50
-50
-50
IN
IN
ST1S12XX, ST1S12XX12, ST1S12XX18
=2.5V, I
=2.5V, I
V
V
IN
IN
-25
-25
temperature
=V
=V
-25
-25
-25
-25
EN
EN
V
V
OUT
OUT
IN
IN
= 2.5V to 5.5V, C
= 2.5V to 5.5V, C
=V
=V
=10mA, C
=10mA, C
0
0
EN
EN
0
0
0
0
=3V, V
=3V, V
25
25
25
25
25
25
IN
IN
OUT
OUT
=C
=C
T [°C]
T [°C]
=1.2V, No Load
=1.2V, No Load
OUT
OUT
T [°C]
T [°C]
T [°C]
T [°C]
IN
IN
50
50
50
50
=C
=C
50
50
=10µF, V
=10µF, V
OUT
OUT
75
75
=10µF, I
=10µF, I
75
75
75
75
OUT
OUT
100
100
=1.8V
=1.8V
100
100
100
100
OUT
OUT
=10mA, V
=10mA, V
125
125
125
125
125
125
OUT
OUT
150
150
150
150
150
150
ON
ON
OFF
OFF
=1.8V
=1.8V
175
175
175
175
175
175