Rev.1.1
_00
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT
CMOS VOLTAGE REGULATOR
S-1172 Series
The S-1172 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-1172 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 packages, high heat radiation HSOP-6 and small SOT-89-5 enable
high-density mounting.
Features
•
Output voltage :
•
Low equivalent series resistance capacitor :
•
Input voltage :
•
High-accuracy output voltage :
•
Low dropout voltage :
•
Low current consumption :
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 I
OUT
= 300 mA)
During operation : 70
µA
typ., 90
µA
max.
(3.0 V output product)
During shutdown : 0.1
µA
typ., 1.0
µA
max.
1000 mA (3.0 V output product, at V
IN
≥
V
OUT(S)
+
1.0 V)
*1
70 dB typ. (at 1.0 kHz, V
OUT
= 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, HSOP-6
•
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.
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
HSOP-6
Drawing Code
Package
UP005-A
FH006-A
Tape
UP005-A
FH006-A
Reel
UP005-A
FH006-A
Land
FH006-A
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1172 Series
■
Block Diagram
*1
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
Rev.1.1
_00
VOUT
+
ON/OFF
ON/OFF circuit
−
Reference
voltage circuit
VSS
*1.
Parasitic diode
Figure 1
2
Seiko Instruments Inc.
Rev.1.1
_00
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1172 Series
Product Name Structure
Users can select the product type, output voltage, and package type for the S-1172 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-1172
x
xx
-
xxxx
G
Package name (abbreviation) and packing specifications
U5T1 : SOT-89-5, Tape
E6T1 : HSOP-6, Tape
Value of output voltage
10 to 50
(e.g., when the output voltage is 1.0 V, it is expressed as 10.)
Product type
*3
*2
*1
A : ON/OFF pin negative logic
B : ON/OFF pin positive logic
*1.
*2.
*3.
Refer to the taping specifications.
If you request the product which has 0.05 step, contact our sales office.
Refer to “3.
Shutdown pin (ON/OFF pin)”
in “
Operation”.
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1172 Series
Rev.1.1
_00
2.
Product Name List
Table 1
Output Voltage
1.0 V
±15
mV
1.1 V
±15
mV
1.2 V
±15
mV
1.3 V
±15
mV
1.4 V
±15
mV
1.5 V
±1.0%
1.6 V
±1.0%
1.7 V
±1.0%
1.8 V
±1.0%
1.85 V
±1.0%
1.9 V
±1.0%
2.0 V
±1.0%
2.1 V
±1.0%
2.2 V
±1.0%
2.3 V
±1.0%
2.4 V
±1.0%
2.5 V
±1.0%
2.6 V
±1.0%
2.7 V
±1.0%
2.8 V
±1.0%
2.85 V
±1.0%
2.9 V
±1.0%
3.0 V
±1.0%
3.1 V
±1.0%
3.2 V
±1.0%
3.3 V
±1.0%
3.4 V
±1.0%
3.5 V
±1.0%
3.6 V
±1.0%
3.7 V
±1.0%
3.8 V
±1.0%
3.9 V
±1.0%
4.0 V
±1.0%
4.1 V
±1.0%
4.2 V
±1.0%
4.3 V
±1.0%
4.4 V
±1.0%
4.5 V
±1.0%
4.6 V
±1.0%
4.7 V
±1.0%
4.8 V
±1.0%
4.9 V
±1.0%
5.0 V
±1.0%
Remark
SOT-89-5
S-1172B10-U5T1G
S-1172B11-U5T1G
S-1172B12-U5T1G
S-1172B13-U5T1G
S-1172B14-U5T1G
S-1172B15-U5T1G
S-1172B16-U5T1G
S-1172B17-U5T1G
S-1172B18-U5T1G
S-1172B1J-U5T1G
S-1172B19-U5T1G
S-1172B20-U5T1G
S-1172B21-U5T1G
S-1172B22-U5T1G
S-1172B23-U5T1G
S-1172B24-U5T1G
S-1172B25-U5T1G
S-1172B26-U5T1G
S-1172B27-U5T1G
S-1172B28-U5T1G
S-1172B2J-U5T1G
S-1172B29-U5T1G
S-1172B30-U5T1G
S-1172B31-U5T1G
S-1172B32-U5T1G
S-1172B33-U5T1G
S-1172B34-U5T1G
S-1172B35-U5T1G
S-1172B36-U5T1G
S-1172B37-U5T1G
S-1172B38-U5T1G
S-1172B39-U5T1G
S-1172B40-U5T1G
S-1172B41-U5T1G
S-1172B42-U5T1G
S-1172B43-U5T1G
S-1172B44-U5T1G
S-1172B45-U5T1G
S-1172B46-U5T1G
S-1172B47-U5T1G
S-1172B48-U5T1G
S-1172B49-U5T1G
S-1172B50-U5T1G
HSOP-6
S-1172B10-E6T1G
S-1172B11-E6T1G
S-1172B12-E6T1G
S-1172B13-E6T1G
S-1172B14-E6T1G
S-1172B15-E6T1G
S-1172B16-E6T1G
S-1172B17-E6T1G
S-1172B18-E6T1G
S-1172B1J-E6T1G
S-1172B19-E6T1G
S-1172B20-E6T1G
S-1172B21-E6T1G
S-1172B22-E6T1G
S-1172B23-E6T1G
S-1172B24-E6T1G
S-1172B25-E6T1G
S-1172B26-E6T1G
S-1172B27-E6T1G
S-1172B28-E6T1G
S-1172B2J-E6T1G
S-1172B29-E6T1G
S-1172B30-E6T1G
S-1172B31-E6T1G
S-1172B32-E6T1G
S-1172B33-E6T1G
S-1172B34-E6T1G
S-1172B35-E6T1G
S-1172B36-E6T1G
S-1172B37-E6T1G
S-1172B38-E6T1G
S-1172B39-E6T1G
S-1172B40-E6T1G
S-1172B41-E6T1G
S-1172B42-E6T1G
S-1172B43-E6T1G
S-1172B44-E6T1G
S-1172B45-E6T1G
S-1172B46-E6T1G
S-1172B47-E6T1G
S-1172B48-E6T1G
S-1172B49-E6T1G
S-1172B50-E6T1G
Please contact our sales office for products with an output voltage other than those
specified above or type A products.
4
Seiko Instruments Inc.
Rev.1.1
_00
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1172 Series
Pin Configuration
SOT-89-5
Top view
5
4
Table 2
Pin No.
1
2
3
4
5
*1.
Symbol
ON/OFF
VSS
NC
*1
VIN
VOUT
GND pin
Description
Shutdown pin
No connection
Input voltage pin
Output voltage pin
1
2
3
The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
Figure 2
HSOP-6
Top view
6
5
4
Pin No.
1
2
3
4
5
6
Table 3
Symbol
VOUT
VSS
ON/OFF
NC
*1
VSS
VIN
GND pin
Shutdown pin
No connection
GND pin
Input voltage pin
Description
Output voltage pin
1
2
3
*1.
The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
Figure 3
Seiko Instruments Inc.
5