Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR1101
CMOS IC
100mA, 4µA QUIESCENT
CURRENT CMOS LDO
REGULATOR

DESCRIPTION
The UTC LR1101 series are ultra-low quiescent current CMOS
LDO (Low Dropout Voltage). Designed for battery-powered system,
the low 4μA quiescent current makes it an ideal choice. The Range
of the output voltage is from 1.5V ~ 5V with 0.1V per step. And the
max output current is 100mA.
Wide range of available output fits most of applications. Built-in
output current-limiting provide maximal protection against any fault
conditions.

FEATURES
* 450mV typically dropout at 100mA
* Ultra-low quiescent current: 4μA
* Wide operating voltage ranges: 2V ~ 6V
* Thermal current limiting protection
* For stability only 1μF output capacitor is required
* High power supply rejection ratio

ORDERING INFORMATION
Ordering Number
Package
LR1101G-xx-AB3-C-R
LR1101G-xx-AE3-5-R
SOT-89
SOT-23
1
G
G
LR1101G-xx-AF5-R
SOT-25
I
Note: Pin Assignment: I: VIN O: VOUT
G: GND NC: No Connection
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Copyright © 2015 Unisonic Technologies Co., Ltd
Pin Assignment
2
3
4
I
O
O
I
G
EN
NC
Packing
5
-
Tape Reel
Tape Reel
O
Tape Reel
EN : Enable
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LR1101
CMOS IC
MARKING INFORMATIONS

PACKAGE
VOLTAGE CODE
PIN CODE
1
2
3
4
5
SOT-89
15:1.5V
18:1.8V
25:2.5V
28:2.8V
30:3.0V
33:3.3V
35:3.5V
36:3.6V
47:4.7V
50:5.0V
C
G
I
O
-
-
-
I
G
EN
NC
O
SOT-25
SOT-23
MARKING
3
5
G
O
I
-
-
Voltage Code
SGXXG
2

PIN DESCRIPTION
SOT-89
2
3
1
PIN NO.
SOT-25
1
5
2
SOT-23
3
2
1
-
3
-
-
4
-
PIN NAME
DESCRIPTION
VIN
VOUT
GND
Input voltage
Output voltage
Ground
EN
NC
Chip enable input
No connection
BLOCK DIAGRAM
VIN
+
Current Limit
_

1
EN
VOUT
GND
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QW-R102-034.H
LR1101

CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VIN
RATINGS
UNIT
7
V
SOT-89
500
mW
Power Dissipation (TA = 25°C)
PD
SOT-23
250
mW
SOT-25
250
mW
Junction Temperature
TJ
125
°C
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
Input Voltage

THERMAL DATA
PARAMETER
SYMBOL
SOT-89
SOT-23
SOT-25
Thermal Resistance

UNIT
°C/W
°C/W
°C/W
ELECTRICAL CHARACTERISTICS(VIN =5.5V, CI =1μF, Co=1μF,TA=25°C, unless otherwise specified)
PARAMETER
Input Voltage Range
Output Voltage Accuracy
SYMBOL
VIN
∆VOUT
Line Regulation
∆VLINE
Load Regulation
Maximum Output Current
Current Limit
∆VLOAD
IMAX
ILIMIT
GND Pin Current
IG
Dropout Voltage
VD
Stand By Current
ISTN-BY
Threshold
EN
Short Current
Thermal Shutdown
ISC
EN
θJA
RATINGS
180
250
250
TEST CONDITIONS
IL = 1mA
VIN = (VOUT + 0.3V) to 6V, VIN≧3.6V,
IOUT = 1mA
ILOUT = 0mA to 100mA
VIN = VOUT + 0.6V, VIN≧3.6V
IL = 100mA
No Load
IOUT = 100mA
IOUT = 1mA, VIN≧3.6V
IOUT = 50mA, VIN≧3.6V
IOUT = 100mA, VIN≧3.6V
EN = VIN
VOUT = High
VOUT = Low
VOUT = 0
Exterior Calefaction
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN.
2
-2
TYP.
-0.2
0.01
100
150
0
2
125
250
4
4
4
200
450
0.1
MAX.
6
+2
UNIT
V
%
0.2
%/V
0.04
%/mA
mA
mA
7
10
10
300
600
1
0.6
VIN
650
μA
mV
μA
V
mA
°C
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LR1101

CMOS IC
APPLICATION INFORMATION
Between VOUT and GND a 1μF (or larger) capacitor is recommended for stability. Without the capacitor the part
may oscillate. When operating below -25°C any type of capacitor can be used, but not Aluminum electrolytes. If
there’s no limit the capacitance may be increased.
Between VIN to GND a 1μF capacitor (or larger) should be placed.

APPLICATION CIRCUIT
UTC LR1101
VIN
VOUT
VOUT
VIN
CI
1µF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
GND
CO
1µF
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QW-R102-034.H
LR1101

CMOS IC
TYPICAL CHARACTERISTICS
Temperature Stability
4
I (µA)
Output Voltage (V)
VOUT=3.3V
3.3
Quiescient Current
5
3.7
2.9
2.5
3
2
1
2.1
VOUT=1.8V
0
25
50
75
Temperature (℃)
0
-30
100 125
0
30
60
90
Temperature (℃)
120
PSRR (dB)
PSRR (dB)
Droput Voltage (V)
Short Circuit Current (mA)
1.7
-50 -25
VIN=5V
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LR1101
CMOS IC
TYPICAL CHARACTERISTICS(Cont.)

Line Transient Response
Line Transient Response
300
300
VOUT=1.8V
200 TA=25
COUT=1µF Electoltic
IOUT=50mA
200
100
6
T
5
4
0 1
2
3 4
5 6 7
Time (mS)
8
9
3
10
CIN=1µF Ceramic
20 COUT=1µF Ceramic
VIN=5V, TA=25℃
VOUT=1.8V
T
Output Voltage
Deviation (mV)
Output Voltage
Deviation (mV)
40
0
1
2
3
4
5
6
7
8
9 10
Time (mS)
Load Transient Response
Load Transient Response
100
50
CIN=1µF Ceramic
COUT=1µF Ceramic
VIN=5V, TA=25℃
VOUT=1.8V
0
-50
100
T
1
Load Current (mA)
-20
Load Current (mA)
T
5
4
50
T
0
6
0
COUT=1µF Electoltic
IOUT=50mA
100
T
0
3
VOUT=3.3V
TA=25
200
100
10
-100
-50
Time (500µS/Div)
Load Current (mA)
Output Voltage
Deviation (mV)
Load Current (mA)
Output Voltage
Deviation (mV)
Time (500µS/Div)
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QW-R102-034.H
LR1101
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-034.H
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