IC DC-DC CONV STDN 1.8V TSOT23-5

ST1S12G18R

Manufacturer Part NumberST1S12G18R
DescriptionIC DC-DC CONV STDN 1.8V TSOT23-5
ManufacturerSTMicroelectronics
TypeStep-Down (Buck)
ST1S12G18R datasheet
 


Specifications of ST1S12G18R

Internal Switch(s)YesSynchronous RectifierYes
Number Of Outputs1Voltage - Output1.8V
Current - Output700mAFrequency - Switching1.7MHz
Voltage - Input2.5 ~ 5.5 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / CaseTSOT-23-5, TSOT-5, TSOP-5
For Use With497-8220 - BOARD EVAL BASED ON ST1S12497-8219 - BOARD EVAL BASED ON ST1S12Lead Free Status / RoHS StatusLead free / RoHS Compliant
Power - Output-Other names497-6831-2
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ST1S12XX, ST1S12XX12, ST1S12XX18
7
Typical performance characteristics
Unless otherwise specified, refer to the typical application circuit under the following
conditions: C
= 4.7 µF, C
IN
Figure 4.
Voltage feedback vs. temperature
650
650
V
V
=V
=V
=3.6V, I
=3.6V, I
=10mA, V
=10mA, V
IN
IN
EN
EN
OUT
OUT
630
630
610
610
590
590
570
570
550
550
-75
-75
-50
-50
-25
-25
0
0
25
25
50
50
T [°C]
T [°C]
Figure 6.
Oscillator frequency vs.
temperature
2.3
2.3
V
V
=V
=V
=3.6V, V
=3.6V, V
=0.65V, V
=0.65V, V
IN
IN
EN
EN
FB
FB
2.1
2.1
1.9
1.9
1.7
1.7
1.5
1.5
1.3
1.3
1.1
1.1
-75
-75
-50 -25
-50 -25
0
0
25
25
50
50
T [°C]
T [°C]
Figure 8.
Efficiency vs. output current
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
V
V
=V
=V
=3.6V, I
=3.6V, I
=from 10mA to 700mA, V
=from 10mA to 700mA, V
IN
IN
EN
EN
OUT
OUT
0
0
0
0
0.1
0.1
0.2
0.2
0.3
0.3
0.4
0.4
I
I
OUT
OUT
= 10 µF, L = 2.2 µH
OUT
Figure 5.
0.5
0.5
=1.8V
=1.8V
OUT
OUT
0.4
0.4
0.3
0.3
0.2
0.2
0.1
0.1
0
0
-75
-75
75
75
100
100
125
125
150
150
175
175
Figure 7.
100
100
=1.8V
=1.8V
90
90
OUT
OUT
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
0
0
75
75
100 125 150 175
100 125 150 175
0
0
Figure 9.
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
=1.8V
=1.8V
OUT
OUT
0
0
-75
-75
0.5
0.5
0.6
0.6
0.7
0.7
[A]
[A]
Doc ID 14314 Rev 3
Typical performance characteristics
Drop vs. temperature
I
I
=700mA
=700mA
, V
, V
=2.7V, Duty cycle=100%
=2.7V, Duty cycle=100%
OUT
OUT
OUT
OUT
-50
-50
-25
-25
0
0
25
25
50
50
75
75
100
100
125
125
T [°C]
T [°C]
Efficiency vs. output current
V
V
=V
=V
=3V, I
=3V, I
=from 10mA to 700mA, V
=from 10mA to 700mA, V
IN
IN
EN
EN
OUT
OUT
0.1
0.1
0.2
0.2
0.3
0.3
0.4
0.4
0.5
0.5
0.6
0.6
I
I
[A]
[A]
OUT
OUT
Efficiency vs. temperature
I
I
OUT
OUT
I
I
=700mA
=700mA
OUT
OUT
V
V
=V
=V
=3.6V, V
=3.6V, V
IN
IN
EN
EN
-50
-50
-25
-25
0
0
25
25
50
50
75
75
100 125 150 175
100 125 150 175
T [°C]
T [°C]
150
150
175
175
=1.2V
=1.2V
OUT
OUT
0.7
0.7
0.8
0.8
=100mA
=100mA
=1.8V
=1.8V
OUT
OUT
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