Rev.5.1
_00
EXTERNAL TRANSISTOR TYPE
CMOS 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.
(8) Lead-free products
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
Package Name
SOT-23-5
Package
MP005-A
Drawing Code
Tape
MP005-A
Reel
MP005-A
Seiko Instruments Inc.
1
EXTERNAL TRANSISTOR TYPE CMOS VOLTAGE REGULATOR
S-816 Series
Block Diagram
Rev.5.1
_00
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.5.1
_00
EXTERNAL TRANSISTOR TYPE CMOS VOLTAGE REGULATOR
S-816 Series
Absolute Maximum Ratings
Table 3
Item
VIN Pin Voltage
VOUT Pin Voltage
ON/ OFF
Pin Voltage
EXT Pin Voltage
EXT Pin Current
Power Dissipation
Symbol
V
IN
V
OUT
V
ON/OFF
V
EXT
I
EXT
P
D
(Ta=25°C unless otherwise specified)
Absolute Maximum Ratings
Unit
V
V
SS
−0.3
to V
SS
+18
V
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 (When not mounted on board)
600
*1
−40
to
+85
−40
to
+125
V
V
mA
mW
mW
°C
°C
Operating Ambient Temperature
T
opr
Storage Temperature
T
stg
*1.
When mounted on board
[Mounted on board]
(1) Board size : 114.3 mm
×
76.2 mm
×
t1.6 mm
(2) Board name : JEDEC STANDARD51-7
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.
(1) When mounted on board
Power Dissipation (P
D
) [mW]
700
(2) When not mounted on board
Power Dissipation (P
D
) [mW]
300
250
600
500
400
300
200
150
200
100
100
50
0
0
100
150
50
Ambient Temperature (Ta) [°C]
0
0
100
150
50
Ambient Temperature (Ta) [°C]
Figure 3 Power Dissipation of Package
Seiko Instruments Inc.
5
PCB Design
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