POWER SUPPLY ICs
HIGH RIPPLE REJECTION AND
LOW DROPOUT VOLTAGE REGULATOR
The S-1111/1121 series is a positive voltage regulator that
features low dropout voltage, high output voltage accuracy,
and low current consumption, and has been developed using
CMOS technology. Since a low on-resistance transistor is
incorporated, the dropout voltage is small, and a large output
current can be obtained. A built-in overcurrent protection cir-
cuit prevents the load current from exceeding the current
capacitance of the output transistor. Moreover, the battery
life can be extended by using the power-on/off circuit. Small
SOT-23-5 and 5-pin SON(A) packages realize high-density
mounting. The lineup includes the S-1111 and S-1121 se-
ries, which differ in pin configuration.
S-1111/1121 series
FEATURES
• Low current consumption
35
µA
typ., 65
µA
max. (during operation)
0.1
µA
typ., 1
µA
max. (during power-off)
• Output voltage: 1.5 to 5.5 V (selectable in 0.1 V steps)
• Output voltage accuracy:
±1.0%
• Output current
150 mA capable (product with 3.0 V output, when V
IN
= 4 V)
• Dropout voltage
200 mV typ. (product with 3.0 V output, when I
OUT
= 100 mA)
• Ripple rejection rate: 70 dB typ. (f = 1 kHz, V
OUT
= 3 V)
• Built-in power-off circuit: Selection of positive/negative logic
is possible.
• Built-in overcurrent protection circuit
PIN CONFIGURATIONS
APPLICATIONS
SOT-23-5 Top view
5
4
1
2
3
4
5
1
2
3
S-1111
VIN
VSS
ON/OFF
NC
VOUT
S-1121
VOUT
VSS
VIN
ON/OFF
NC
5-pin SON(A) Top view
5
4
1
2
3
4
5
S-1111
ON/OFF
VSS
VIN
VOUT
NC
S-1121
VOUT
VSS
NC
ON/OFF
VIN
•
•
•
•
Constant voltage power supply for battery-powered devices
Constant voltage power supply for communication devices
Constant voltage power supply for household electrical appliances
Constant voltage power supply for cellular phones
1
2
3
SELECTION GUIDE
Output voltage
1.5V
±
1.0%
1.6V
±
1.0%
1.7V
±
1.0%
1.8V
±
1.0%
1.9V
±
1.0%
2.0V
±
1.0%
2.1V
±
1.0%
2.2V
±
1.0%
2.3V
±
1.0%
2.4V
±
1.0%
2.5V
±
1.0%
2.6V
±
1.0%
2.7V
±
1.0%
2.8V
±
1.0%
2.9V
±
1.0%
3.0V
±
1.0%
3.1V
±
1.0%
3.2V
±
1.0%
3.3V
±
1.0%
3.4V
±
1.0%
3.5V
±
1.0%
3.6V
±
1.0%
3.7V
±
1.0%
3.8V
±
1.0%
3.9V
±
1.0%
4.0V
±
1.0%
4.1V
±
1.0%
4.2V
±
1.0%
4.3V
±
1.0%
4.4V
±
1.0%
4.5V
±
1.0%
4.6V
±
1.0%
4.7V
±
1.0%
4.75V
±
1.0%
4.8V
±
1.0%
4.9V
±
1.0%
5.0V
±
1.0%
5.1V
±
1.0%
5.2V
±
1.0%
5.3V
±
1.0%
5.4V
±
1.0%
5.5V
±
1.0%
S-1111 series
SOT-23-5
5-pin SON(A)
(3000/reel)
(3000/reel)
S-1111B15MC-NYA-TF S-1111B15PN-NYA-TF
S-1111B16MC-NYB-TF S-1111B16PN-NYB-TF
S-1111B17MC-NYC-TF S-1111B17PN-NYC-TF
S-1111B18MC-NYD-TF S-1111B18PN-NYD-TF
S-1111B19MC-NYE-TF S-1111B19PN-NYE-TF
S-1111B20MC-NYF-TF S-1111B20PN-NYF-TF
S-1111B21MC-NYG-TF S-1111B21PN-NYG-TF
S-1111B22MC-NYH-TF S-1111B22PN-NYH-TF
S-1111B23MC-NYI-TF
S-1111B23PN-NYI-TF
S-1111B24MC-NYJ-TF S-1111B24PN-NYJ-TF
S-1111B25MC-NYK-TF S-1111B25PN-NYK-TF
S-1111B26MC-NYL-TF S-1111B26PN-NYL-TF
S-1111B27MC-NYM-TF S-1111B27PN-NYM-TF
S-1111B28MC-NYN-TF S-1111B28PN-NYN-TF
S-1111B29MC-NYO-TF S-1111B29PN-NYO-TF
S-1111B30MC-NYP-TF S-1111B30PN-NYP-TF
S-1111B31MC-NYQ-TF S-1111B31PN-NYQ-TF
S-1111B32MC-NYR-TF S-1111B32PN-NYR-TF
S-1111B33MC-NYS-TF S-1111B33PN-NYS-TF
S-1111B34MC-NYT-TF
S-1111B34PN-NYT-TF
S-1111B35MC-NYU-TF S-1111B35PN-NYU-TF
S-1111B36MC-NYV-TF S-1111B36PN-NYV-TF
S-1111B37MC-NYW-TF S-1111B37PN-NYW-TF
S-1111B38MC-NYX-TF S-1111B38PN-NYX-TF
S-1111B39MC-NYY-TF S-1111B39PN-NYY-TF
S-1111B40MC-NYZ-TF S-1111B40PN-NYZ-TF
S-1111B41MC-NZA-TF S-1111B41PN-NZA-TF
S-1111B42MC-NZB-TF S-1111B42PN-NZB-TF
S-1111B43MC-NZC-TF S-1111B43PN-NZC-TF
S-1111B44MC-NZD-TF S-1111B44PN-NZD-TF
S-1111B45MC-NZE-TF S-1111B45PN-NZE-TF
S-1111B46MC-NZF-TF S-1111B46PN-NZF-TF
S-1111B47MC-NZG-TF S-1111B47PN-NZG-TF
-
-
S-1111B48MC-NZH-TF S-1111B48PN-NZH-TF
S-1111B49MC-NZI-TF
S-1111B49PN-NZI-TF
S-1111B50MC-NZJ-TF
S-1111B50PN-NZJ-TF
S-1111B51MC-NZK-TF S-1111B51PN-NZK-TF
S-1111B52MC-NZL-TF S-1111B52PN-NZL-TF
S-1111B53MC-NZM-TF S-1111B53PN-NZM-TF
S-1111B54MC-NZN-TF S-1111B54PN-NZN-TF
S-1111B55MC-NZO-TF S-1111B55PN-NZO-TF
S-1121 series
SOT-23-5
5-pin SON(A)
(3000/reel)
(3000/reel)
S-1121B15MC-N2A-TF S-1121B15PN-N2A-TF
S-1121B16MC-N2B-TF S-1121B16PN-N2B-TF
S-1121B17MC-N2C-TF S-1121B17PN-N2C-TF
S-1121B18MC-N2D-TF S-1121B18PN-N2D-TF
S-1121B19MC-N2E-TF S-1121B19PN-N2E-TF
S-1121B20MC-N2F-TF S-1121B20PN-N2F-TF
S-1121B21MC-N2G-TF S-1121B21PN-N2G-TF
S-1121B22MC-N2H-TF S-1121B22PN-N2H-TF
S-1121B23MC-N2I-TF
S-1121B23PN-N2I-TF
S-1121B24MC-N2J-TF
S-1121B24PN-N2J-TF
S-1121B25MC-N2K-TF S-1121B25PN-N2K-TF
S-1121B26MC-N2L-TF
S-1121B26PN-N2L-TF
S-1121B27MC-N2M-TF S-1121B27PN-N2M-TF
S-1121B28MC-N2N-TF S-1121B28PN-N2N-TF
S-1121B29MC-N2O-TF S-1121B29PN-N2O-TF
S-1121B30MC-N2P-TF S-1121B30PN-N2P-TF
S-1121B31MC-N2Q-TF S-1121B31PN-N2Q-TF
S-1121B32MC-N2R-TF S-1121B32PN-N2R-TF
S-1121B33MC-N2S-TF S-1121B33PN-N2S-TF
S-1121B34MC-N2T-TF
S-1121B34PN-N2T-TF
S-1121B35MC-N2U-TF S-1121B35PN-N2U-TF
S-1121B36MC-N2V-TF
S-1121B36PN-N2V-TF
S-1121B37MC-N2W-TF S-1121B37PN-N2W-TF
S-1121B38MC-N2X-TF S-1121B38PN-N2X-TF
S-1121B39MC-N2Y-TF
S-1121B39PN-N2Y-TF
S-1121B40MC-N2Z-TF S-1121B40PN-N2Z-TF
S-1121B41MC-N3A-TF S-1121B41PN-N3A-TF
S-1121B42MC-N3B-TF S-1121B42PN-N3B-TF
S-1121B43MC-N3C-TF S-1121B43PN-N3C-TF
S-1121B44MC-N3D-TF S-1121B44PN-N3D-TF
S-1121B45MC-N3E-TF S-1121B45PN-N3E-TF
S-1121B46MC-N3F-TF S-1121B46PN-N3F-TF
S-1121B47MC-N3G-TF S-1121B47PN-N3G-TF
S-1121B4HMC-N3P-TF
-
S-1121B48MC-N3H-TF S-1121B48PN-N3H-TF
S-1121B49MC-N3I-TF
S-1121B49PN-N3I-TF
S-1121B50MC-N3J-TF
S-1121B50PN-N3J-TF
S-1121B51MC-N3K-TF S-1121B51PN-N3K-TF
S-1121B52MC-N3L-TF
S-1121B52PN-N3L-TF
S-1121B53MC-N3M-TF S-1121B53PN-N3M-TF
S-1121B54MC-N3N-TF S-1121B54PN-N3N-TF
S-1121B55MC-N3O-TF S-1121B55PN-N3O-TF
Dropout voltage
(typ.)
(I
OUT
=100mA)
0.60V
0.60V
0.60V
0.60V
0.60V
0.35V
0.35V
0.35V
0.35V
0.35V
0.24V
0.24V
0.24V
0.20V
0.20V
0.20V
0.20V
0.20V
0.20V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
0.17V
Output current
(min.)
(V
IN
≥V
OUT(S)
+1.0V)
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
150mA
Current consumption
during operation (typ.)
(V
IN
=V
OUT(S)
+1.0V, no load)
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
35µA
Remark
Please contact our sales office if you desire a product with an inverted ON/OFF pin logic.
12
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