UNISONIC TECHNOLOGIES CO., LTD
LR1801
1.0A FAST ULTRA LOW
DROPOUT LINEAR
REGULATOR
DESCRIPTION
CMOS IC
The UTC
LR1801/LR1801AD
operate from a +1.5V ~ +6V
input supply as fast ultra low-dropout linear regulators. Wide output
voltage range options are available. The fast response
characteristic to make UTC
LR1801/LR1801AD
suitable for low
voltage microprocessor application. The low quiescent current
operation and low dropout quality caused by the CMOS process.
The UTC
LR1801/LR1801AD
has low dropout voltage. The
ground pin current is typically 60uA.
Output Voltage Precision: Multiple output voltage options are
available and ranging from 1.2V ~ 5.0V at room temperature with a
guaranteed accuracy of ±1.5%, and ±3.0% when varying line and
load.
The output voltage types of UTC
LR1801-xx
are fixed one in
the IC and UTC
LR1801AD
are adjustable one.
FEATURES
* Low Dropout Voltage
* The Guaranteed Output Current is 1A DC
* Output Voltage Accuracy ± 1.5%
* Over temperature Protection And Over current Protection
www.unisonic.com.tw
Copyright © 2017 Unisonic Technologies Co., Ltd
1 of 10
QW-R502-A03.N
LR1801
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
1
1
LR1801L-xx-AA3-○-R
LR1801G-xx-AA3-○-R
1
LR1801L-xx-AB3-○-R
1
LR1801G-xx-AB3-○-R
CMOS IC
Package
SOT-223
SOT-89
TO-252
HSOP-8
SOT-223
SOT-89
TO-252
HSOP-8
Pin Assignment
1
○
Pin Code 1
A
G
B
O
C
G
D
I
Pin Code 1
A
G
B
O
C
G
D
I
2
O
G
I
G
2
O
G
I
G
3
I
I
O
O
3
I
I
O
O
Packing
Tape Reel
1
LR1801L-xx-TN3-○-R
1
LR1801G-xx-TN3-○-R
LR1801L-xx-SH2-R
1
LR1801ADL-AA3-○-R
1
LR1801ADL-AB3-○-R
LR1801G-xx-SH2-R
1
LR1801ADG-AA3-○-R
1
LR1801ADG-AB3-○-R
refer to Pin Configuration
Tape Reel
Tape Reel
1
LR1801ADL-TN3-○-R
1
LR1801ADG-TN3-○-R
LR1801ADL-SH2-R
Note: Pin Assignment: G: GND
LR1801ADG-SH2-R
O: V
OUT
I: V
IN
refer to Pin Configuration
Tape Reel
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 10
QW-R502-A03.N
LR1801
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
CMOS IC
SOT-223
SOT-89
TO-252
12: 1.2V
15 : 1.5V
18: 1.8V
25: 2.5V
30: 3.0V
33: 3.3V
50: 5.0V
HSOP-8
MARKING INFORMATION (For LR1801AD)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 10
QW-R502-A03.N
LR1801
PIN CONFIGURATION
CMOS IC
V
OUT
ON/ OFF
NC
GND
1
2
8
7
V
IN
NC
NC
NC
V
OUT
1
2
8
7
V
IN
ON/OFF
NC
NC
GND
3
4
6
5
ADJ
NC
GND
GND
3
4
6
5
PIN DESCRIPTION
PIN NO.
HSOP-8
HSOP-8
(Fixed)
(Adjustable)
4
4
1
1
8
8
2
7
PIN NAME
GND
V
OUT
V
IN
ON/
OFF
GND
Output voltage
Input voltage
ON/OFF select pin, Active High.
PIN DESCRIPTION
3, 5,6,7
3, 5,6,
NC
No connection
-
2
ADJ
Adjustable Pin
Note: The NC pin is electrically open.
The NC pin can be connected to V
IN
or GND.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 10
QW-R502-A03.N
LR1801
BLOCK DIAGRAM
Fixed Output Voltage
CMOS IC
Adjustable Output Voltage
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-A03.N
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