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S-1155 (Seiko Instruments) : Total 28 Pages

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Rev.1.1_00
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT
CMOS VOLTAGE REGULATOR
S-1155 Series
www.datasheet4u.com
The S-1155 Series, developed based on CMOS technology, is a positive
voltage regulator with a super low dropout voltage, high output voltage
accuracy, and low current consumption.
The S-1155 Series provides the very small dropout voltage and the large
output current due to the built-in transistor with low on-resistance. The
overcurrent protector prevents the load current from exceeding the
capacitance of output transistor. The thermal shutdown circuit prevents
damage caused by heat, the rush current control circuit limits the
excessive rush current during start-up.
The ON/OFF circuit ensures longer battery life. Various capacitors, also
small ceramic capacitors, can be used for this IC more than for the
conventional regulator ICs which have CMOS technology.
The small package SOT-89-5 enables high-density mounting.
„ Features
Output voltage :
Low equivalent series resistance capacitor :
Input voltage :
High-accuracy output voltage :
Low dropout voltage :
Low current consumption :
Output current :
High ripple rejection :
Built-in overcurrent protection circuit :
Built-in thermal shutdown circuit :
Built-in rush current control circuit :
Built-in power on/off circuit :
Small package :
Lead-free product
1.0 to 5.0 V, selectable in 0.05 V step.
Ceramic capacitor of 4.7 µF or more can be used as the
I/O capacitor.
1.5 to 5.5 V
±1.0% (1.0 to 1.45 V output product : ±15 mV)
70 mV typ. (3.0 V output product, at IOUT = 200 mA)
During operation : 70 µA typ., 90 µA max. (3.0 V output
product)
During shutdown : 0.1 µA typ., 1.0 µA max.
500 mA (3.0 V output product, at VIN VOUT(S) + 1.0 V)*1
70 dB typ. (at 1.0 kHz, VOUT = 1.0 V)
limits overcurrent of output transistor
prevents damage caused by heat
limits excessive rush current during start-up
Longer battery life
SOT-89-5
*1. Attention should be paid to the power dissipation of the package when the output current is large.
„ Applications
Power supply for battery-powered devices
Power supply for TV, notebook PCs and home electric appliances
Constant-voltage power supply for portable equipment
„ Packages
Package Name
SOT-89-5
Package
UP005-A
Drawing Code
Tape
UP005-A
Reel
UP005-A
Seiko Instruments Inc.
1



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HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1155 Series
Block Diagram
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VIN
*1
Overcurrent
protection circuit
Thermal shutdown circuit
ON/OFF
ON/OFF circuit
+
Reference
voltage circuit
VSS
*1. Parasitic diode
Figure 1
Rev.1.1_00
VOUT
2 Seiko Instruments Inc.



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Rev.1.1_00
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1155 Series
„ Product Name Structure
www.dataUshseeerts4uc.aconmselect the product type, output voltage, and package type for the S-1155 Series. Refer to “1. Product
Name” regarding the contents of product name, “2. Product Name List” regarding details of product name.
1. Product Name
S-1155 x xx - U5T1 G
Package name (abbreviation) and packing specifications*1
U5T1 : SOT-89-5, Tape
Value of output voltage*2
10 to 50
(e.g., when the output voltage is 1.0 V, it is expressed as 10.)
Product type*3
A : ON/OFF pin negative logic
B : ON/OFF pin positive logic
*1. Refer to the taping specifications.
*2. If you request the product which has 0.05 step, contact our sales office.
*3. Refer to “3. Shutdown pin (ON/OFF pin)” in “„ Operation”.
Seiko Instruments Inc.
3



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HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1155 Series
2. Product Name List
www.datasheet4u.com
Table 1
Output Voltage
SOT-89-5
1.0 V ±15 mV
S-1155B10-U5T1G
1.1 V ±15 mV
S-1155B11-U5T1G
1.2 V ±15 mV
S-1155B12-U5T1G
1.3 V ±15 mV
S-1155B13-U5T1G
1.4 V ±15 mV
S-1155B14-U5T1G
1.5 V ±1.0%
S-1155B15-U5T1G
1.6 V ±1.0%
S-1155B16-U5T1G
1.7 V ±1.0%
S-1155B17-U5T1G
1.8 V ±1.0%
S-1155B18-U5T1G
1.85 V ±1.0%
S-1155B1J-U5T1G
1.9 V ±1.0%
S-1155B19-U5T1G
2.0 V ±1.0%
S-1155B20-U5T1G
2.1 V ±1.0%
S-1155B21-U5T1G
2.2 V ±1.0%
S-1155B22-U5T1G
2.3 V ±1.0%
S-1155B23-U5T1G
2.4 V ±1.0%
S-1155B24-U5T1G
2.5 V ±1.0%
S-1155B25-U5T1G
2.6 V ±1.0%
S-1155B26-U5T1G
2.7 V ±1.0%
S-1155B27-U5T1G
2.8 V ±1.0%
S-1155B28-U5T1G
2.85 V ±1.0%
S-1155B2J-U5T1G
2.9 V ±1.0%
S-1155B29-U5T1G
3.0 V ±1.0%
S-1155B30-U5T1G
3.1 V ±1.0%
S-1155B31-U5T1G
3.2 V ±1.0%
S-1155B32-U5T1G
3.3 V ±1.0%
S-1155B33-U5T1G
3.4 V ±1.0%
S-1155B34-U5T1G
3.5 V ±1.0%
S-1155B35-U5T1G
3.6 V ±1.0%
S-1155B36-U5T1G
3.7 V ±1.0%
S-1155B37-U5T1G
3.8 V ±1.0%
S-1155B38-U5T1G
3.9 V ±1.0%
S-1155B39-U5T1G
4.0 V ±1.0%
S-1155B40-U5T1G
4.1 V ±1.0%
S-1155B41-U5T1G
4.2 V ±1.0%
S-1155B42-U5T1G
4.3 V ±1.0%
S-1155B43-U5T1G
4.4 V ±1.0%
S-1155B44-U5T1G
4.5 V ±1.0%
S-1155B45-U5T1G
4.6 V ±1.0%
S-1155B46-U5T1G
4.7 V ±1.0%
S-1155B47-U5T1G
4.8 V ±1.0%
S-1155B48-U5T1G
4.9 V ±1.0%
S-1155B49-U5T1G
5.0 V ±1.0%
S-1155B50-U5T1G
Remark Please contact our sales office for products with an
output voltage other than those specified above or type
A products.
Rev.1.1_00
4 Seiko Instruments Inc.






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