S-1112/1122 Series
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© Seiko Instruments Inc., 2002-2010
HIGH RIPPLE-REJECTION AND LOW DROPOUT
CMOS VOLTAGE REGULATOR
Rev.6.0
_00
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 SNT-
6A(H) (S-1112 Series only) and SOT-23-5 packages realize high-density mounting. In SOT-23-5, 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.
•
High peak current capability:
150 mA output is possible (at V
IN
≥
V
OUT(S)
+
1.0 V)
*1
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. (at 1.0 kHz)
•
High ripple rejection:
Overcurrent of output transistor can be restricted.
•
Built-in overcurrent protector:
*2
•
Lead-free, Sn 100%, halogen-free
*1.
Attention should be paid to the power dissipation of the package when the output current is large.
*2.
Refer to “
Product Name Structure”
for details.
•
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
•
SNT-6A(H)
•
SOT-23-5
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.6.0
_00
S-1112/1122 Series
Block Diagram
*1
VIN
VOUT
Overcurrent
protector
ON/OFF
ON/OFF
circuit
+
−
Reference
voltage circuit
VSS
*1.
Parasitic diode
Figure 1
2
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.6.0
_00
S-1112/1122 Series
Product Name Structure
The product types and output voltage for the S-1112/1122 Series can be selected at the user’s request.
Refer to the “1.
Product Name”
for the construction of the product name, “2.
Package”
regarding the
package drawings and “3.
Product Name List”
for the full product names.
1. Product name
(1) S-1112 Series
S-1112
x
xx
xx
−
xxx
TF
x
Environmental code
U:
Lead-free (Sn 100%), halogen-free
G: Lead-free (for details, please contact our sales office)
IC direction in tape specifications
*1
Product name (abbreviation)
*2
Package name (abbreviation)
PI : SNT-6A(H)
MC: SOT-23-5
Output voltage
15 to 55
(E.g., when the output voltage is 1.5 V,
it is expressed as 15.)
Product type
*3
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
*1.
Refer to the tape specifications at the end of this book.
*2.
Refer to the product name list.
*3.
Refer to
3. Shutdown pin (ON/OFF pin)
in the “
Operation”.
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.6.0
_00
S-1112/1122 Series
(2) S-1122 Series
S-1122
x
xx
MC
−
xxx
TF
x
Environmental code
U:
Lead-free (Sn 100%), halogen-free
G: Lead-free (for details, please contact our sales office)
IC direction in tape specifications
*1
Product name (abbreviation)
*2
Package name (abbreviation)
MC: SOT-23-5
Output voltage
15 to 55
(E.g., when the output voltage is 1.5 V,
it is expressed as 15.)
Product type
*3
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
*1.
Refer to the tape specifications at the end of this book.
*2.
Refer to the product name list.
*3.
Refer to 3. Shutdown pin (ON/OFF pin) in the “
Operation”.
2. Package
Package name
SNT-6A(H)
SOT-23-5
Drawing code
Package
PI006-A-P-SD
MP005-A-P-SD
Tape
PI006-A-C-SD
MP005-A-C-SD
Reel
PI006-A-R-SD
MP005-A-R-SD
Land
PI006-A-L-SD
⎯
4
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.6.0
_00
S-1112/1122 Series
3. Product name list
(1) S-1112 Series
Table
Output Voltage
1
SNT-6A(H)
SOT-23-5
S-1112B15PI-L6ATFx
S-1112B15MC-L6ATFx
1.5 V ±1.0%
S-1112B16PI-L6BTFx
S-1112B16MC-L6BTFx
1.6 V ±1.0%
S-1112B17PI-L6CTFx
S-1112B17MC-L6CTFx
1.7 V ±1.0%
S-1112B18PI-L6DTFx
S-1112B18MC-L6DTFx
1.8 V ±1.0%
S-1112B19PI-L6ETFx
S-1112B19MC-L6ETFx
1.9 V ±1.0%
S-1112B20PI-L6FTFx
S-1112B20MC-L6FTFx
2.0 V ±1.0%
S-1112B21PI-L6GTFx
S-1112B21MC-L6GTFx
2.1 V ±1.0%
S-1112B22PI-L6HTFx
S-1112B22MC-L6HTFx
2.2 V ±1.0%
S-1112B23PI-L6ITFx
S-1112B23MC-L6ITFx
2.3 V ±1.0%
S-1112B24PI-L6JTFx
S-1112B24MC-L6JTFx
2.4 V ±1.0%
S-1112B25PI-L6KTFx
S-1112B25MC-L6KTFx
2.5 V ±1.0%
S-1112B26PI-L6LTFx
S-1112B26MC-L6LTFx
2.6 V ±1.0%
S-1112B27PI-L6MTFx
S-1112B27MC-L6MTFx
2.7 V ±1.0%
S-1112B28PI-L6NTFx
S-1112B28MC-L6NTFx
2.8 V ±1.0%
S-1112B2JPI-L7PTFx
S-1112B2JMC-L7PTFx
2.85 V ±1.0%
S-1112B29PI-L6OTFx
S-1112B29MC-L6OTFx
2.9 V ±1.0%
S-1112B30PI-L6PTFx
S-1112B30MC-L6PTFx
3.0 V ±1.0%
S-1112B31PI-L6QTFx
S-1112B31MC-L6QTFx
3.1 V ±1.0%
S-1112B32PI-L6RTFx
S-1112B32MC-L6RTFx
3.2 V ±1.0%
S-1112B33PI-L6STFx
S-1112B33MC-L6STFx
3.3 V ±1.0%
3.4 V ±1.0%
S-1112B34PI-L6TTFx
S-1112B34MC-L6TTFx
3.5 V ±1.0%
S-1112B35PI-L6UTFx
S-1112B35MC-L6UTFx
3.6 V ±1.0%
S-1112B36PI-L6VTFx
S-1112B36MC-L6VTFx
3.7 V ±1.0%
S-1112B37PI-L6WTFx
S-1112B37MC-L6WTFx
3.8 V ±1.0%
S-1112B38PI-L6XTFx
S-1112B38MC-L6XTFx
3.9 V ±1.0%
S-1112B39PI-L6YTFx
S-1112B39MC-L6YTFx
4.0 V ±1.0%
S-1112B40PI-L6ZTFx
S-1112B40MC-L6ZTFx
S-1112B41PI-L7ATFx
S-1112B41MC-L7ATFx
4.1 V ±1.0%
S-1112B42PI-L7BTFx
S-1112B42MC-L7BTFx
4.2 V ±1.0%
4.3 V ±1.0%
S-1112B43PI-L7CTFx
S-1112B43MC-L7CTFx
4.4 V ±1.0%
S-1112B44PI-L7DTFx
S-1112B44MC-L7DTFx
4.5 V ±1.0%
S-1112B45PI-L7ETFx
S-1112B45MC-L7ETFx
4.6 V ±1.0%
S-1112B46PI-L7FTFx
S-1112B46MC-L7FTFx
4.7 V ±1.0%
S-1112B47PI-L7GTFx
S-1112B47MC-L7GTFx
4.8 V ±1.0%
S-1112B48PI-L7HTFx
S-1112B48MC-L7HTFx
4.9 V ±1.0%
S-1112B49PI-L7ITFx
S-1112B49MC-L7ITFx
S-1112B50PI-L7JTFx
S-1112B50MC-L7JTFx
5.0 V ±1.0%
5.1 V ±1.0%
S-1112B51PI-L7KTFx
S-1112B51MC-L7KTFx
5.2 V ±1.0%
S-1112B52PI-L7LTFx
S-1112B52MC-L7LTFx
5.3 V ±1.0%
S-1112B53PI-L7MTFx
S-1112B53MC-L7MTFx
5.4 V ±1.0%
S-1112B54PI-L7NTFx
S-1112B54MC-L7NTFx
5.5 V ±1.0%
S-1112B55PI-L7OTFx
S-1112B55MC-L7OTFx
Remark 1.
Please contact our sales office for type A products.
2.
x: G or U
3.
Please select products of environmental code = U for Sn 100%, halogen-free products.
Seiko Instruments Inc.
5
