Rev.4.1
_10
EXTERNAL TRANSISTOR TYPE VOLTAGE REGULATOR
S-816 Series
The S-816 Series consists of external transistor type positive
voltage regulators, which have been developed using the CMOS
process. These voltage regulators incorporate an overcurrent
protection, and shutdown function. A low drop-out type regulator
with an output current ranging from several hundreds of mA to 1 A
can be configured with the PNP transistor driven by this IC.
Despite the features of the S-816, which is low current
consumption, the improvement in its transient response
characteristics of the IC with a newly deviced phase compensation
circuit made it possible to employ the products of the S-816 Series
even in applications where heavy input variation or load variation is
experienced.
The S-816 Series regulators serve as ideal power supply units for
portable devices when coupled with the SOT-23-5 minipackage,
providing numerous outstanding features, including low current
consumption. Since this series can accommodate an input voltage
of up to 16 V, it is also suitable when operating via an AC adapter.
Features
(1) Low current consumption
•
Operation mode:
30
µA
typ., 40
µA
max.
•
Shutdown mode:
1
µA
max.
(2) Input voltage range:
16 V max.
(3) Output voltage accuracy:
±
2.0%
(4) Output voltage range:
Selectable between 2.5 V and 6.0 V in steps of 0.1 V.
(5) With shutdown function.
(6) A built-in current source (10
µA)
eliminates the need of a base-emitter resistance.
(7) With overcurrent (base current) protection function.
Applications
•
Power supplies for on-board such as battery devices for portable telephones, electronic notebooks, PDAs.
•
Constant voltage power supplies for cameras, video equipment and portable communications equipment.
•
Power Supplies for CPUs.
•
Post-Regulators for Switching Regulators.
•
Main Regulators in Multiple-Power Supply Systems.
Package
SOT-23-5 (Package drawing code: MP005-A)
Seiko Instruments Inc.
1
EXTERNAL TRANSISTOR TYPE VOLTAGE REGULATOR
S-816 Series
Block Diagram
Rev.4.1
_10
VIN
EXT
VOUT
Current Source
Pull-Up
Overcurrent
Protection
Circuit
+
−
+
V
REF
ON/ OFF
−
Error
Amplifier
+
−
Sink
Driver
VSS
Remark 1.
To ensure you power cutoff of the external transistor when the device is powered down, the
EXT output is pulled up to V
IN
by a pull-up resistance (approx. 0.5 MΩ) inside the IC.
2.
The diode inside the IC is a parasitic diode.
Figure 1
2
Seiko Instruments Inc.
Rev.4.1
_10
Product Code Structure
1. Product Name
S-816A
xx
A
EXTERNAL TRANSISTOR TYPE VOLTAGE REGULATOR
S-816 Series
MC
-
xxx
-
T2
IC direction in tape specifications
Product name (abbreviation)
Package name (abbreviation)
MC: SOT-23-5
Output voltage
×
10
25 to 60 (2.5 V to 6.0 V)
2. Product Name List
Table 1
Output Voltage
(V)
4.3 V±2.0%
4.4 V±2.0%
4.5 V±2.0%
4.6 V±2.0%
4.7 V±2.0%
4.8 V±2.0%
4.9 V±2.0%
5.0 V±2.0%
5.1 V±2.0%
5.2 V±2.0%
5.3 V±2.0%
5.4 V±2.0%
5.5 V±2.0%
5.6 V±2.0%
5.7 V±2.0%
5.8 V±2.0%
5.9 V±2.0%
6.0 V±2.0%
Output Voltage
(V)
2.5 V±2.0%
2.6 V±2.0%
2.7 V±2.0%
2.8 V±2.0%
2.9 V±2.0%
3.0 V±2.0%
3.1 V±2.0%
3.2 V±2.0%
3.3 V±2.0%
3.4 V±2.0%
3.5 V±2.0%
3.6 V±2.0%
3.7 V±2.0%
3.8 V±2.0%
3.9 V±2.0%
4.0 V±2.0%
4.1 V±2.0%
4.2 V±2.0%
Product Name
S-816A25AMC-BAA-T2
S-816A26AMC-BAB-T2
S-816A27AMC-BAC-T2
S-816A28AMC-BAD-T2
S-816A29AMC-BAE-T2
S-816A30AMC-BAF-T2
S-816A31AMC-BAG-T2
S-816A32AMC-BAH-T2
S-816A33AMC-BAI-T2
S-816A34AMC-BAJ-T2
S-816A35AMC-BAK-T2
S-816A36AMC-BAL-T2
S-816A37AMC-BAM-T2
S-816A38AMC-BAN-T2
S-816A39AMC-BAO-T2
S-816A40AMC-BAP-T2
S-816A41AMC-BAQ-T2
S-816A42AMC-BAR-T2
Product Name
S-816A43AMC-BAS-T2
S-816A44AMC-BAT-T2
S-816A45AMC-BAU-T2
S-816A46AMC-BAV-T2
S-816A47AMC-BAW-T2
S-816A48AMC-BAX-T2
S-816A49AMC-BAY-T2
S-816A50AMC-BAZ-T2
S-816A51AMC-BBA-T2
S-816A52AMC-BBB-T2
S-816A53AMC-BBC-T2
S-816A54AMC-BBD-T2
S-816A55AMC-BBE-T2
S-816A56AMC-BBF-T2
S-816A57AMC-BBG-T2
S-816A58AMC-BBH-T2
S-816A59AMC-BBI-T2
S-816A60AMC-BBJ-T2
Seiko Instruments Inc.
3
EXTERNAL TRANSISTOR TYPE VOLTAGE REGULATOR
S-816 Series
Pin Configuration
SOT-23-5
Top view
Table 2
5
4
Pin No.
1
2
3
4
5
Symbol
EXT
VSS
ON/ OFF
VIN
VOUT
Rev.4.1
_10
Description
Output Pin for Base-Current Control
GND Pin
Shutdown Pin ("H" active)
IC Power Supply Pin
Output Voltage Monitoring Pin
1
2
Figure 2
3
Absolute Maximum Ratings
Table 3
Item
VIN Pin Voltage
VOUT Pin Voltage
ON/ OFF Pin Voltage
EXT Pin Voltage
EXT Pin Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Symbol
V
IN
V
OUT
V
ON/OFF
V
EXT
I
EXT
P
D
T
opr
T
stg
(Ta=25°C unless otherwise specified)
Absolute Maximum Ratings
Unit
V
SS
−0.3
to V
SS
+18
V
SS
−0.3
to V
SS
+18
V
SS
−0.3
to V
SS
+18
V
SS
−0.3
to V
IN
+0.3
50
250
−40
to
+85
−40
to
+125
V
V
V
V
mA
mW
°C
°C
Caution The absolute maximum ratings are rated values exceeding which the product
could suffer physical damage. These values must therefore not be exceeded
under any conditions.
4
Seiko Instruments Inc.
Rev.4.1
_10
Electrical Characteristics
EXTERNAL TRANSISTOR TYPE VOLTAGE REGULATOR
S-816 Series
Table 4
Item
Input Voltage
Output Voltage
Maximum Output Current (PNP
*1
Output)
*1
Drop-Out Voltage
*1
Load Regulation (PNP Output)
Line Regulation (PNP Output)
*1
Symbol
V
IN
V
OUT
∆V
drop
∆V
OUT
∆
V
OUT
V
OUT
• ∆
V
IN
∆
V
OUT
∆
Ta
I
SS
I
STB
I
SRC
R
UP
I
SINK
I
OFF
I
MAX
V
SH
V
SL
Conditions
V
IN
=V
OUT
+1
V, I
OUT
=50
mA,
V
ON/OFF
="H"
I
OUT
=100
mA
V
IN
=V
OUT
+1
V, 1 mA
<
I
OUT
<
1 A
(Ta=25°C unless otherwise specified)
Test
Min.
Typ.
Max. Unit
circuit
16
V
1
V
OUT
V
OUT
V
OUT
V
1
×0.98
×1.02
1
100
0.01
±0.15
30
−10
0.50
10
16
60
0.15
40
1
1.00
0.1
20
0.3
0.1
−0.1
µA
2
A
mV
mV
%/V
mV/°C
µA
µA
µA
MΩ
mA
µA
mA
V
1
1
1
1
1
1
1
2
2
2
2
2
3
I
OUT
=50
mA, V
OUT
+1
V
<
V
IN
<
16 V
−0.15
V
IN
=V
OUT
+1
V, I
OUT
=50
mA,
V
ON/OFF
="H",
Ta=−40 to 85°C
V
IN
=V
OUT
+1
V, V
ON/OFF
="H"
V
IN
=16
V, V
ON/OFF
="L"
V
IN
=V
OUT
+1
V, V
ON/OFF
="H",
V
EXT
=V
OUT
, V
OUT
=V
OUT
×0.95
V
IN
=16
V, V
ON/OFF
="L"
V
IN
=V
OUT
+1
V, V
ON/OFF
="H",
V
OUT
=V
OUT
×0.95
V
IN
=V
EXT
=V
OUT
+1
V, V
OUT
=0
V,
V
ON/OFF
="L"
V
IN
=V
EXT
=7
V, V
ON/OFF
="H",
V
OUT
=V
OUT
×0.95
V
IN
=V
OUT
+1
V, V
OUT
=0
V,
Check V
EXT
="L"
V
IN
=V
OUT
+1
V, V
OUT
=0
V,
Check V
EXT
="H"
V
ON/OFF
=V
OUT
+1
V
V
ON/OFF
=0
V
0.25
12
2.4
Output Voltage Temperature
Coefficient
Current Consumption during
Operation
Current Consumption during
Shutdown
EXT Output Source Constant
Current
EXT Output Pull-Up Resistance
EXT Output Sink Current
Leakage Current during EXT
Output Off
EXT Output Sink Overcurrent
Set Value
Shutdown Pin Input Voltage
Shutdown Pin Input Current
I
SH
I
SL
*1.
The characteristics vary with the associated external components.
The characteristics given above are those obtained when the IC is combined with a Toshiba Corporation 2SA1213-Y
for the PNP transistor and a 10
µF
tantalum capacitor for the output capacitor (C
L
).
Seiko Instruments Inc.
5
