Rev.2.2
_00
HIGH RIPPLE-REJECTION
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1112/1122 Series
The S-1112/1122 Series is a positive voltage
regulator with a low dropout voltage, high output
voltage accuracy, and low current consumption
developed based on CMOS technology.
A built-in low on-resistance transistor provides a
low dropout voltage and large output current, and
a built-in overcurrent protector prevents the load
current from exceeding the current capacitance of
the output transistor. An ON/OFF circuit ensures a
long battery life. Compared with the voltage
regulators using the conventional CMOS process,
a larger variety of capacitors are available,
including small ceramic capacitors. Small SOT-
23-5 and 5-Pin SON(A) packages realize high-
density mounting. The lineup includes the S-1112
and S-1122 Series, which differ in pin
configuration.
Features
1.5 V to 5.5 V, selectable in 0.1 V steps.
±1.0%
190 mV typ. (3.0 V output product, I
OUT
=
100 mA)
During operation: 50
µA
typ., 90
µA
max.
During shutdown: 0.1
µA
typ., 1.0
µA
max.
*1
•
High peak current capability:
150 mA output is possible (@ V
IN
≥
V
OUT(S)
+
1.0 V)
Ensures long battery life.
•
Built-in ON/OFF circuit:
•
Low ESR capacitor can be used: A ceramic capacitor of 0.47
µF
or more can be used for the output
capacitor.
80 dB typ. (@ 1.0 kHz)
•
High ripple rejection:
Overcurrent of output transistor can be restricted.
•
Built-in overcurrent protector:
SOT-23-5, 5-Pin SON(A)
•
Small package:
*1.
Attention should be paid to the power dissipation of the package when the output current is large.
•
Output voltage:
•
High-accuracy output voltage:
•
Low dropout voltage:
•
Low current consumption:
Applications
•
Power supply for battery-powered devices
•
Power supply for personal communication devices
•
Power supply for home electric/electronic appliances
•
Power supply for cellular phones
Packages
•
SOT-23-5
•
5-Pin SON(A)
(Package drawing code: MP005-A)
(Package drawing code: PN005-A)
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.2
_00
S-1112/1122 Series
Block Diagram
*1
VIN
Overcurrent
protector
VOUT
ON/OFF
ON/OFF
circuit
+
−
Reference
voltage circuit
VSS
*1.
Parasitic diode
Figure 1
2
Seiko Instruments Inc.
Rev.2.2
_00
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1112/1122 Series
Product Code Structure
•
The product types and output voltage for the S-1112/1122 Series can be selected at the user’s request.
Refer to the “Product name” for the meanings of the characters in the product name and “Product name
list” for the full product names.
1. Product name (S-1112 Series)
S-1112
x
xx
xx
–
xxx
–
TF
IC direction in tape specifications
Product name (abbreviation)
*2
*1
Package name (abbreviation)
MC: SOT-23-5
PN: 5-Pin SON(A)
Output voltage
15 to 55
(E.g., when the output voltage is 1.5 V, it is
expressed as 15.)
Product type
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
*1.
Refer to the taping specifications at the end of this book.
*2.
Refer to the product name list.
*3.
Refer to 3. Shutdown (ON/OFF pin) under the Operation.
2. Product name list (S-1112 Series)
Table 1
Output Voltage
SOT-23-5
5-Pin SON(A)
1.5 V ±1.0%
S-1112B15MC-L6A-TF
S-1112B15PN-L6A-TF
1.8 V ±1.0%
S-1112B18MC-L6D-TF
S-1112B18PN-L6D-TF
2.5 V ±1.0%
S-1112B25MC-L6K-TF
S-1112B25PN-L6K-TF
2.6 V ±1.0%
S-1112B26MC-L6L-TF
S-1112B26PN-L6L-TF
2.7 V ±1.0%
S-1112B27MC-L6M-TF
S-1112B27PN-L6M-TF
2.8 V ±1.0%
S-1112B28MC-L6N-TF
S-1112B28PN-L6N-TF
2.9 V ±1.0%
S-1112B29MC-L6O-TF
S-1112B29PN-L6O-TF
3.0 V ±1.0%
S-1112B30MC-L6P-TF
S-1112B30PN-L6P-TF
3.1 V ±1.0%
S-1112B31MC-L6Q-TF
S-1112B31PN-L6Q-TF
3.3 V ±1.0%
S-1112B33MC-L6S-TF
S-1112B33PN-L6S-TF
5.0 V ±1.0%
S-1112B50MC-L7J-TF
S-1112B50PN-L7J-TF
Remark
Please contact the SII marketing department for products with an output voltage other than
those specified above or type A products.
*3
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.2
_00
S-1112/1122 Series
3. Product name (S-1122 Series)
S-1122
x
xx
xx
–
xxx
–
TF
IC direction in tape specifications
Product name (abbreviation)
*2
*1
Package name (abbreviation)
MC: SOT-23-5
PN: 5-Pin SON(A)
Output voltage
15 to 55
(E.g., when the output voltage is 1.5 V, it is
expressed as 15.)
Product type
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
*1.
Refer to the taping specifications at the end of this book.
*2.
Refer to the product name list.
*3.
Refer to 3. Shutdown pin (ON/OFF pin) under the Operation.
4. Product name list (S-1122 Series)
Table 2
Output Voltage
SOT-23-5
5-Pin SON(A)
1.5 V ±1.0%
S-1122B15MC-L8A–TF
S-1122B15PN-L8A–TF
1.8 V ±1.0%
S-1122B18MC-L8D–TF
S-1122B18PN-L8D–TF
2.5 V ±1.0%
S-1122B25MC-L8K–TF
S-1122B25PN-L8K–TF
2.6 V ±1.0%
S-1122B26MC-L8L–TF
S-1122B26PN-L8L–TF
2.7 V ±1.0%
S-1122B27MC-L8M–TF
S-1122B27PN-L8M–TF
2.8 V ±1.0%
S-1122B28MC-L8N–TF
S-1122B28PN-L8N–TF
2.9 V ±1.0%
S-1122B29MC-L8O–TF
S-1122B29PN-L8O–TF
3.0 V ±1.0%
S-1122B30MC-L8P–TF
S-1122B30PN-L8P–TF
3.1 V ±1.0%
S-1122B31MC-L8Q–TF
S-1122B31PN-L8Q–TF
3.3 V ±1.0%
S-1122B33MC-L8S–TF
S-1122B33PN-L8S–TF
5.0 V ±1.0%
S-1122B50MC-L9J–TF
S-1122B50PN-L9J–TF
Remark
Please contact the SII marketing department for products with an output voltage other than
those specified above or type A products.
*3
4
Seiko Instruments Inc.
Rev.2.2
_00
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1112/1122 Series
Pin Configuration
SOT-23-5
Top view
5
4
Table 3
Pin No.
1
2
3
4
5
Symbol
VIN
VSS
ON/OFF
*1
NC
VOUT
(S-1112 Series)
Description
Input voltage pin
GND pin
Shutdown pin
No connection
Output voltage pin
*1.
The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
1
2
3
Pin No.
1
2
3
4
5
Table 4
Symbol
VOUT
VSS
VIN
ON/OFF
*1
NC
(S-1122 Series)
Description
Output voltage pin
GND pin
Input voltage pin
Shutdown pin
No connection
Figure 2
*1.
The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
Seiko Instruments Inc.
5
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