Contents
Features .............................................................................................. 1
Applications ......................................................................................... 1
Pin Assignment ................................................................................... 1
Block Diagram ..................................................................................... 1
Selection Guide ................................................................................... 2
Absolute Maximum Ratings ................................................................. 2
Electrical Characteristics ..................................................................... 3
Test Circuits ........................................................................................ 11
Technical Terms.................................................................................. 12
Operation............................................................................................. 13
Transient Response ............................................................................ 14
Standard Circuit................................................................................... 17
Application Circuits .............................................................................. 17
Notes on Design .................................................................................. 19
Dimensions.......................................................................................... 20
Markings.............................................................................................. 20
Package Power Dissipation ................................................................. 21
Taping Dimensions.............................................................................. 22
Characteristics..................................................................................... 25
Measuring Circuits............................................................................... 31
Frequently Asked Questions................................................................ 32
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
Low power consumption (2.5
A max.)
High accuracy of output voltage
±2% : V
OUT
2.7 V
±2.4% : V
OUT
2.6 V
Small input/output voltage difference
(S-81250SG: 160 mV typ. I
OUT
=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. I
OUT
=1
A to 40 mA)
TO-92, SOT-89-3 and SOT-23-5 package
Block Diagram
*
V
OUT
2
3
V
IN
+
-
R
L
GND
1
Ref.
vol.
* Parasitic diode
Figure 1
Applications
Constant voltage power supply of battery-powered equipment, communications equipment, video equipment
and others
Pin Assignment
(1)
TO-92
1 GND
2 V
IN
3 V
OUT
(2)
SOT-89-3
Top view
1 GND
2 V
IN
3 V
OUT
(3)
SOT-23-5
Top View
NC
NC
1
1 2 3
2
3
GND
V
IN
V
OUT
Bottom view
Figure 2
Seiko Instruments Inc.
1
HIGH PRECISION VOLTAGE REGULATOR
S-812XXSG Series
Selection Guide
Table 1
Output voltage
1.1
2.4%
1.5
2.4%
1.7
2.4%
1.8
2.4%
2.0
2.4%
2.1
2.4%
2.3
2.4%
2.4
2.4%
2.5
2.4%
2.7
2.0%
3.0
2.0%
3.3
2.0%
3.5
2.0%
3.6
2.0%
3.7
2.0%
4.0
2.0%
4.2
2.0%
4.5
2.0%
4.6
2.0%
4.7
2.0%
5.0
2.0%
5.2
2.0%
5.3
2.0%
5.4
2.0%
5.5
2.0%
5.6
2.0%
*
TO-92 *1
S-81211SGY-X
S-81215SGY-X
SOT-89-3 *2
S-81211SGUP-DQA-X
S-81215SGUP-DQK-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
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
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
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
Table 2
Parameter
Input voltage
Output voltage
Output current
Power dissipation
Operating temperature
Storage temperature
Symbol
V
IN
V
OUT
I
OUT
P
D
T
opr
T
stg
TO-92
SOT-89-3
SOT-23-5
(Unless otherwise specified: Ta=25
C)
Ratings
12
18
V
IN
+0.3 to V
SS
-0.3
100
400
500
150
-40 to +85
-40 to +125
Unit
V
V
mA
mW
Conditions
V
OUT
2.6 V
V
OUT
2.7 V
C
C
Caution:
Keep static electricity to a minimum.
2
Seiko Instruments Inc.
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 V
OUT
Symbol
V
OUT
Conditions
V
IN
=1.5 V, I
OUT
=0.5 mA
I
OUT
=0.5 mA
V
IN
=1.5 to 10 V
I
OUT
=0.5 mA
V
IN
=1.5 to 10 V
I
OUT
=10 A
V
IN
I
OUT
Min.
1.073
Typ.
1.100
0.05
10
10
10
1.2
Max.
1.127
0.2
50
77
100
2.5
10
Unit
V
V
mV
mV
mV
(Unless otherwise specified: Ta=25 C)
Test cir.
1
1
1
1
1
2
V
V
V
V
dif
OUT
1
OUT
2
OUT
3
=1.5 V
=10
A to 0.5 mA
I
SS
V
IN
=1.5 V, Unloaded
V
IN
=1.5 V, I
OUT
= 0.5 mA
Ta=-40 C to 85 C
V
Ta
V
IN
OUT
A
V
mV/ C
±0.138
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 V
OUT
Symbol
V
OUT
Conditions
V
IN
=3.5 V, I
OUT
=0.5 mA
I
OUT
=0.5 mA
V
IN
=2.5 to 10 V
I
OUT
=0.5 mA
V
IN
=2.5 to 10 V
I
OUT
=1 A
V
IN
I
OUT
Min.
1.464
Typ.
1.500
0.03
7
7
80
1.2
Max.
1.536
0.18
39
105
120
2.5
10
Unit
V
V
mV
mV
mV
(Unless otherwise specified: Ta=25 C)
Test cir.
1
1
1
1
1
2
V
V
V
V
dif
OUT
1
OUT
2
OUT
3
=3.5 V
=1
A to10 mA
I
SS
V
IN
=3.5 V, Unloaded
V
IN
=3.5 V, I
OUT
= 0.5 mA
Ta=-40 C to 85 C
V
Ta
V
IN
OUT
A
V
mV/ C
±0.188
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 V
OUT
Symbol
V
OUT
Conditions
V
IN
=3.7 V, I
OUT
=10 mA
I
OUT
=10 mA
V
IN
=2.7 to 10 V
I
OUT
=1 mA
V
IN
=2.7 to 10 V
I
OUT
=1 A
V
IN
I
OUT
Min.
1.659
Typ.
1.700
0.77
8
8
80
1.2
Max.
1.741
1.63
43
119
120
2.5
10
Unit
V
V
mV
mV
mV
(Unless otherwise specified: Ta=25 C)
Test cir.
1
1
1
1
1
2
V
V
V
V
dif
OUT
1
OUT
2
OUT
3
=3.7 V
=1
A to 10 mA
I
SS
V
IN
=3.7 V, Unloaded
V
IN
=3.7 V, I
OUT
= 10 mA
Ta=-40 C to 85 C
V
Ta
V
IN
OUT
A
V
mV/ C
±0.213
Seiko Instruments Inc.
3
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 V
OUT
Symbol
V
OUT
Conditions
V
IN
=3.8 V, I
OUT
=10 mA
I
OUT
=10 mA
V
IN
=2.8 to 10 V
I
OUT
=1 mA
V
IN
=2.8 to 10 V
I
OUT
=1 A
V
IN
I
OUT
Min.
1.756
Typ.
1.800
0.72
8
8
80
1.2
Max.
1.843
1.55
45
126
120
2.5
10
Unit
V
V
mV
mV
mV
(Unless otherwise specified
:
Ta=25 C)
Test cir.
1
1
1
1
1
2
V
V
V
V
dif
OUT
1
OUT
2
OUT
3
=3.8 V
=1
A to 10 mA
I
SS
V
IN
=3.8 V, Unloaded
V
IN
=3.8 V, I
OUT
= 10 mA
Ta=-40 C to 85 C
V
Ta
V
IN
OUT
A
V
mV/ C
±0.225
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 V
OUT
Symbol
V
OUT
Conditions
V
IN
=4.0 V, I
OUT
=10 mA
I
OUT
=10 mA
V
IN
=3.0 to 10 V
I
OUT
=1 mA
V
IN
=3.0 to 10 V
I
OUT
=1 A
V
IN
I
OUT
Min.
1.592
Typ.
2.000
0.63
8
8
80
1.2
Max.
2.048
1.39
48
140
120
2.5
10
Unit
V
V
mV
mV
mV
(Unless otherwise specified
:
Ta=25 C)
Test cir.
1
1
1
1
1
2
V
V
V
V
dif
OUT
1
OUT
2
OUT
3
=4.0 V
=1
A to 10 mA
I
SS
V
IN
=4.0 V, Unloaded
V
IN
=4.0 V, I
OUT
= 10 mA
Ta=-40 C to 85 C
V
Ta
V
IN
OUT
A
V
mV/ C
±0.250
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 V
OUT
Symbol
V
OUT
Conditions
V
IN
=4.1 V, I
OUT
=10 mA
I
OUT
=10 mA
V
IN
=3.1 to 10 V
I
OUT
=1 mA
V
IN
=3.1 to 10 V
I
OUT
=1 A
V
IN
I
OUT
Min.
2.049
Typ.
2.100
0.59
9
9
80
1.2
Max.
2.151
1.32
50
147
120
2.5
10
Unit
V
V
mV
mV
mV
(Unless otherwise specified
:
Ta=25 C)
Test cir.
1
1
1
1
1
2
V
V
V
V
dif
OUT
1
OUT
2
OUT
3
=4.1 V
=1
A to 10 mA
I
SS
V
IN
=4.1 V, Unloaded
V
IN
=4.1 V, I
OU
T = 10 mA
Ta=-40 C to 85 C
V
Ta
V
IN
OUT
A
V
mV/ C
±0.263
4
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