Datasheet
ST1S12XX, ST1S12XX12, ST1S12XX18 Typical performance characteristics
Doc ID 14314 Rev 5 11/20
7 Typical performance characteristics
Unless otherwise specified, refer to the typical application circuit under the following
conditions: C
IN
= 4.7 µF, C
OUT
= 10 µF, L = 2.2 µH
Figure 4. Voltage feedback vs. temperature Figure 5. Drop vs. temperature
Figure 6. Oscillator frequency vs.
temperature
Figure 7. Efficiency vs. output current
Figure 8. Efficiency vs. output current Figure 9. Efficiency vs. temperature
550
570
590
610
630
650
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
V
FB
[mV]
V
IN
=V
EN
=3.6V, I
OUT
=10mA, V
OUT
=1.8V
550
570
590
610
630
650
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
V
FB
[mV]
V
IN
=V
EN
=3.6V, I
OUT
=10mA, V
OUT
=1.8V
0
0.1
0.2
0.3
0.4
0.5
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Drop [V]
I
OUT
=700mA
, V
OUT
=2.7V, Duty cycle=100%
0
0.1
0.2
0.3
0.4
0.5
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Drop [V]
I
OUT
=700mA
, V
OUT
=2.7V, Duty cycle=100%
1.1
1.3
1.5
1.7
1.9
2.1
2.3
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
PWM freq.[MHz]
V
IN
=V
EN
=3.6V, V
FB
=0.65V, V
OUT
=1.8V
1.1
1.3
1.5
1.7
1.9
2.1
2.3
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
PWM freq.[MHz]
V
IN
=V
EN
=3.6V, V
FB
=0.65V, V
OUT
=1.8V
0
10
20
30
40
50
60
70
80
90
100
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
I
OU
T
[A]
Efficiency [%]
V
IN
=V
EN
=3V, I
OUT
=from 10mA to 700mA, V
OUT
=1.2V
0
10
20
30
40
50
60
70
80
90
100
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
I
OU
T
[A]
Efficiency [%]
V
IN
=V
EN
=3V, I
OUT
=from 10mA to 700mA, V
OUT
=1.2V
0
10
20
30
40
50
60
70
80
90
100
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
I
OU
T
[A]
Efficiency [%]
V
IN
=V
EN
=3.6V, I
OUT
=from 10mA to 700mA, V
OUT
=1.8V
0
10
20
30
40
50
60
70
80
90
100
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
I
OU
T
[A]
Efficiency [%]
V
IN
=V
EN
=3.6V, I
OUT
=from 10mA to 700mA, V
OUT
=1.8V
0
10
20
30
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Efficiency [%]
I
OUT
=100mA
I
OUT
=700mA
V
IN
=V
EN
=3.6V, V
OUT
=1.8V
0
10
20
30
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Efficiency [%]
I
OUT
=100mA
I
OUT
=700mA
V
IN
=V
EN
=3.6V, V
OUT
=1.8V