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HIGH-PRECISION
VOLTAGE REGULATOR
S-812XXSG Series
The S-812XXSG Series is a three-terminal positive voltage regulator
made using the CMOS process. Since the S-812XXSG Series has
higher precision output voltage and consumes less current than existing
three-terminal voltage regulators, battery-powered portable equipment
can have a higher performance and a longer service life.
 Features
 Block Diagram
 Low power consumption (2.5 A max.)
 High accuracy of output voltage
±2% : VOUT2.7 V
±2.4% : VOUT2.6 V
 Small input/output voltage difference
(S-81250SG: 160 mV typ. IOUT=10 mA)
 Low temperature coefficient of output voltage
(S-81250SG: ±0.625 mV/C typ.)
 Wide operating voltage range
(S-81250SG: 16 V max.)
 Good line regulation
(S-81250SG: 40 mV typ. IOUT=1A to 40 mA)
TO-92, SOT-89-3 and SOT-23-5 package
VIN
2
*
VOUT
3
Ref.
GND vol.
1
+
-
RL
* Parasitic diode
 Applications
Figure 1
 Constant voltage power supply of battery-powered equipment, communications equipment, video equipment
and others
 Pin Assignment
(1) TO-92
1 GND
2 VIN
3 VOUT
1 2 3 Bottom view
(2) SOT-89-3
Top view
12 3
Figure 2
1 GND
2 VIN
3 VOUT
(3) SOT-23-5
Top View
NC NC
GND VIN VOUT
Seiko Instruments Inc.
1

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HIGH PRECISION VOLTAGE REGULATOR
S-812XXSG Series
 Selection Guide
Table 1
Output voltage
1.12.4%
1.52.4%
1.72.4%
1.82.4%
2.02.4%
2.12.4%
2.32.4%
2.42.4%
2.52.4%
2.72.0%
3.02.0%
3.32.0%
3.52.0%
3.62.0%
3.72.0%
4.02.0%
4.22.0%
4.52.0%
4.62.0%
4.72.0%
5.02.0%
5.22.0%
5.32.0%
5.42.0%
5.52.0%
5.62.0%
TO-92 *1
S-81211SGY-X
S-81215SGY-X
S-81220SGY-X
S-81223SGY-X
S-81224SGY-X
S-81225SGY-X
S-81230SGY-X
S-81233SGY-X
S-81235SGY-X
S-81237SGY-X
S-81240SGY-X
S-81245SGY-X
S-81246SGY-X
S-81250SGY-X
S-81252SGY-X
SOT-89-3 *2
S-81211SGUP-DQA-X
S-81215SGUP-DQK-X
S-81220SGUP-DQS-X
S-81221SGUP-DQU-X
S-81224SGUP-DQX-X
S-81225SGUP-DQH-X
S-81227SGUP-DQZ-X
S-81230SGUP-DQB-X
S-81233SGUP-DQF-X
S-81235SGUP-DQI-X
S-81236SGUP-DQ7-X
S-81237SGUP-DQE-X
S-81240SGUP-DQJ-X
S-81245SGUP-DQ5-X
S-81246SGUP-DQM-X
S-81250SGUP-DQD-X
S-81252SGUP-DQL-X
S-81253SGUP-DIJ-X
S-81254SGUP-DIK-X
S-81255SGUP-DIL-X
S-81256SGUP-DIM-X
SOT-23-5 *2
S-81211SG-QA-X
S-81215SG-QK-X
S-81217SG-QQ-X
S-81218SG-QR-X
S-81220SG-QS-X
S-81223SG-QW-X
S-81224SG-QX-X
S-81225SG-QH-X
S-81230SG-QB-X
S-81233SG-QF-X
S-81235SG-QI-X
S-81237SG-QE-X
S-81240SG-QJ-X
S-81242SG-IB-X
S-81245SG-Q5-X
S-81246SG-QM-X
S-81247SG-IE-X
S-81250SG-QD-X
S-81252SG-QL-X
*1 In the TO-92 package, “x” differs depending upon the packaging form:
B : Loose
T, Z : Tape
*2 In the SOT package, “x” differs depending upon the packaging form (in the SOT-23-5 package, on-tape
packed products only):
S : Stick
T : Tape (T1 and T2 are available depending upon the direction of the IC)
 Absolute Maximum Ratings
Parameter
Input voltage
Output voltage
Output current
Power dissipation
Operating temperature
Storage temperature
Table 2
(Unless otherwise specified: Ta=25C)
Symbol Conditions
Ratings
Unit
VIN
VOUT
IOUT
PD
Topr
Tstg
VOUT2.6 V
VOUT2.7 V
TO-92
SOT-89-3
SOT-23-5
12
18
VIN+0.3 to VSS-0.3
100
400
500
150
-40 to +85
-40 to +125
V
V
mA
mW
C
C
Caution: Keep static electricity to a minimum.
2 Seiko Instruments Inc.

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HIGH-PRECISION VOLTAGE REGULATOR
S-812XXSG Series
 Electrical Characteristics
1. S-81211SGY-X, S-81211SGUP-DQA-X, S-81211SG-QA-X (1.1-V output type)
Table 3
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =1.5 V, IOUT =0.5 mA
IOUT=0.5 mA
VIN =1.5 to 10 V
IOUT=0.5 mA
VIN =1.5 to 10 V
IOUT=10 A
VIN =1.5 V
IOUT=10 A to 0.5 mA
VIN =1.5 V, Unloaded
 VIN=1.5 V, IOUT = 0.5 mA
Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min. Typ. Max. Unit Test cir.
1.073


1.100
0.05
10
1.127
0.2
50
V
V
mV
1
1
1
 10 77 mV 1
 10 100 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.138
mV/ C
2. S-81215SGY-X, S-81215SGUP-DQK-X, S-81215SG-QK-X (1.5-V output type)
Table 4
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =3.5 V, IOUT =0.5 mA
IOUT=0.5 mA
VIN =2.5 to 10 V
IOUT=0.5 mA
VIN =2.5 to 10 V
IOUT=1 A
VIN =3.5 V
IOUT=1 A to10 mA
VIN =3.5 V, Unloaded
VIN=3.5 V, IOUT = 0.5 mA
 Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min. Typ. Max. Unit Test cir.
1.464


1.500
0.03
7
1.536
0.18
39
V
V
mV
1
1
1
 7 105 mV 1
 80 120 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.188
mV/ C
3. S-81217SG-QQ-X (1.7-V output type)
Table 5
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =3.7 V, IOUT =10 mA
IOUT=10 mA
VIN =2.7 to 10 V
IOUT=1 mA
VIN =2.7 to 10 V
IOUT=1 A
VIN =3.7 V
IOUT=1 A to 10 mA
VIN =3.7 V, Unloaded
 VIN=3.7 V, IOUT = 10 mA
Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min. Typ. Max. Unit Test cir.
1.659


1.700
0.77
8
1.741
1.63
43
V
V
mV
1
1
1
 8 119 mV 1
 80 120 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.213
mV/ C
Seiko Instruments Inc.
3

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HIGH PRECISION VOLTAGE REGULATOR
S-812XXSG Series
4. S-81218SG-QR-X (1.8-V output type)
Table 6
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =3.8 V, IOUT =10 mA
IOUT=10 mA
VIN =2.8 to 10 V
IOUT=1 mA
VIN =2.8 to 10 V
IOUT=1 A
VIN =3.8 V
IOUT=1 A to 10 mA
VIN =3.8 V, Unloaded
 VIN=3.8 V, IOUT = 10 mA
Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min. Typ. Max. Unit Test cir.
1.756


1.800
0.72
8
1.843
1.55
45
V
V
mV
1
1
1
 8 126 mV 1
 80 120 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.225
mV/ C
5. S-81220SGY-X, S-81220SGUP-DQS-X, S-81220SG-QS-X (2.0-V output type)
Table 7
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =4.0 V, IOUT =10 mA
IOUT=10 mA
VIN =3.0 to 10 V
IOUT=1 mA
VIN =3.0 to 10 V
IOUT=1 A
VIN =4.0 V
IOUT=1 A to 10 mA
VIN =4.0 V, Unloaded
 VIN=4.0 V, IOUT = 10 mA
Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min. Typ. Max. Unit Test cir.
1.592


2.000
0.63
8
2.048
1.39
48
V
V
mV
1
1
1
 8 140 mV 1
 80 120 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.250
mV/ C
6. S-81221SGUP-DQU-X (2.1-V output type)
Table 8
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =4.1 V, IOUT =10 mA
IOUT=10 mA
VIN =3.1 to 10 V
IOUT=1 mA
VIN =3.1 to 10 V
IOUT=1 A
VIN =4.1 V
IOUT=1 A to 10 mA
VIN =4.1 V, Unloaded
 VIN=4.1 V, IOUT = 10 mA
Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min. Typ. Max. Unit Test cir.
2.049


2.100
0.59
9
2.151
1.32
50
V
V
mV
1
1
1
 9 147 mV 1
 80 120 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.263
mV/ C
4 Seiko Instruments Inc.

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HIGH-PRECISION VOLTAGE REGULATOR
S-812XXSG Series
7. S-81223SGY-X, S-81223SG-QW-X (2.3-V output type)
Table 9
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =4.3 V, IOUT =10 mA
IOUT=10 mA
VIN =3.3 to 10 V
IOUT=1 mA
VIN =3.3 to 10 V
IOUT=1 A
VIN =4.3 V
IOUT=1 A to 10 mA
VIN =4.3 V, Unloaded
 VIN=4.3 V, IOUT = 10 mA
Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min. Typ. Max. Unit Test cir.
2.244


2.300
0.53
9
2.356
1.20
54
V
V
mV
1
1
1
 9 161 mV 1
 80 120 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.288
mV/ C
8. S-81224SGY-X, S-81224SGUP-DQX-X, S-81224SG-QX-X (2.4-V output type)
Table 10
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =4.4 V, IOUT =10 mA
IOUT=10 mA
VIN =3.4 to 10 V
IOUT=1 mA
VIN =3.4 to 10 V
IOUT=1 A
VIN =4.4 V
IOUT=1 A to 10 mA
VIN =4.4 V, Unloaded
 VIN=4.4 V, IOUT = 10 mA
Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min.
2.342


Typ.
2.400
0.49
10
Max.
2.458
1.15
55
Unit Test cir.
V1
V1
mV 1
 10 168 mV
1
 80 120 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.300
mV/ C
9. S-81225SGY-X, S-81225SGUP-DQH-X, S-81225SG-QH-X (2.5-V output type)
Table 11
Parameter
Output voltage
I/O voltage difference
Line regulation 1
Line regulation 2
Load regulation
Current consumption
Input voltage
Temperature charac-
teristic of VOUT
Symbol
VOUT
Vdif
VOUT1
VOUT2
VOUT3
ISS
VIN
VOUT
Ta
Conditions
VIN =4.5 V, IOUT =10 mA
IOUT=10 mA
VIN =3.5 to 10 V
IOUT=1 mA
VIN =3.5 to 10 V
IOUT=1 A
VIN =4.5 V
IOUT=1 A to 10 mA
VIN =4.5 V, Unloaded
 VIN=4.5 V, IOUT = 10 mA
Ta=-40 C to 85 C
(Unless otherwise specified: Ta=25 C)
Min. Typ. Max. Unit Test cir.
2.440


2.500
0.59
10
2.560
1.32
57
V
V
mV
1
1
1
 10 175 mV
1
 80 120 mV
1
 1.2 2.5
A
2
  10 V 
   ±0.313
mV/ C
Seiko Instruments Inc.
5