Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR1122D
CMOS IC
LOW NOISE 200mA LDO
REGULATOR

DESCRIPTION
The UTC LR1122D is a typical LDO (linear regulator) with the
features of high output voltage accuracy, low supply current, low
ON-resistance, and high ripple rejection.
During operation of the UTC LR1122D, the dropout voltage is
very low and the response of line transient and load transient are
very well.
Internally, there’re many functions of UTC LR1122D which can
be seen in the block figure. There are a voltage reference unit, an
error amplifier, resistor-net for voltage setting, a current limit circuit,
and a chip enable circuit in each UTC LR1122D.
The UTC LR1122D can be used as an ideal of the power supply
for hand-held communication equipment, such as: power source for
portable communication equipment, power source for electrical
appliances, for example, cameras, VCRs and camcorders and power
source for battery-powered equipment.

FEATURES
* Ultra Supply Current:
* Standby Mode:
* Very Low Dropout Voltage:
* Ripple Rejection:
20µA (Typ.)
0.1µA (Typ.)
0.13V (Typ.)
@IOUT =150mA, VOUT =2.85V
75dB (Typ.)
@f=1kHz,VOUT=2.85V
±30ppm/°C (Typ.)
* Temperature-Drift Coefficient
of Output Voltage:
0.02%/ V (Typ.)
* Well Line Regulation:
±1.0% (Typ.)
* Output Voltage Accuracy:
* Internal Fold Back Protection Circuit: 40mA (Typ.) @ short mode
* CIN=COUT=1µF or more (Ceramic capacitors) are recommended to
be used with this IC

ORDERING INFORMATION
Ordering Number
Package
LR1122DG-xx-AF5-R
LR1122DG-xx-AB3-C-R
Note: xx: Output Voltage, refer to Marking Information.
SOT-25
SOT-89
www.unisonic.com.tw
Copyright © 2016 Unisonic Technologies Co., Ltd
1
I
G
Pin Assignment
2
3
4
G
CE
NC
I
O
-
5
O
-
Packing
Tape Reel
Tape Reel
1 of 7
QW-R502-320.M
LR1122D

MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
12: 1.2V
15: 1.5V
16: 1.6V
18: 1.8V
20: 2.0V
22: 2.2V
25: 2.5V
2J: 2.85V
30: 3.0V
33: 3.3V
50: 5.0V
SOT-89
SOT-25

CMOS IC
4
5
Voltage Code
SDXXG
1
2
3
PIN CONFIGURATION
SOT-89
SOT-25
PIN CODE: C

PIN DESCRIPTIONS
PIN NAME
VIN
GND
CE
NC
VOUT

DESCRIPTION
Input Pin
Ground Pin
Chip Enable Pin. Active when this Pin is high.
No Connection
Output Pin
BLOCK DIAGRAM
VIN
VOUT
+
Reference
Voltage
Current Limit
CE
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
GND
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QW-R502-320.M
LR1122D

CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
Input Voltage
Input Voltage(CE Pin)
Output Voltage
Output Current
SYMBOL
VIN
VCE
VOUT
IOUT
RATINGS
UNIT
9
V
8.5
V
-0.3~ VIN+0.3
V
200
mA
SOT-25
420
Power Dissipation
PD
mW
SOT-89
550
Junction Temperature
TJ
+125
°С
Operating Temperature
TOPR
-40~+85
°С
Storage Temperature
TSTG
-55~+125
°С
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.

ELECTRICAL CHARACTERISTICS
(TA=25°С, VIN=Set VOUT+1V, IOUT=1mA, CI =CO=1µF, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
VIN = Set VOUT+1V
VOUT > 2.0V
×0.99
Output Voltage
VOUT
IOUT=30mA
-20
VOUT ≤ 2.0V
Input Voltage
VIN
Load Regulation
∆VOUT
1mA≤IOUT≤150mA
Output Current
IOUT
200
Supply Current
ISS
I OUT=0A
Supply Current (Standby)
IST-BY
VCE=0V
Short Current Limit
ILIMIT
VOUT=0V
CE Pull-down Current
IPD
High
VCEH
1.5
CE Input Voltage
Low
VCEL
Output Noise
eN
BW=10Hz to 100kHz, IOUT =30mA
f=1kHz, Ripple 0.2VP-P
VIN=Set VOUT+1V, IOUT=30mA
Ripple Rejection
RR
(In case that V OUT=2.0V, VIN=3V)
1.2V≤VOUT<1.5V
1.5V≤VOUT<1.7V
1.7V≤VOUT<2.0V
Dropout Voltage
VD
I OUT=150mA
2.0V≤VOUT<2.5V
2.5V≤VOUT<2.8V
Line Regulation
Output Voltage Temperature
Coefficient
Low Output Nch Tr.
ON Resistance
∆VOUT
∆VIN
∆VOUT
∆T
RLOW
2.8V≤VOUT≤5.0V
1.2V≤VOUT≤4.0V, VSET+1V≤VIN≤5V
4.0V<VOUT≤5.0V, VSET+1V≤VIN≤6.5V
30
UNIT
V
mV
V
mV
mA
µA
µA
mA
µA
V
V
µVrms
75
dB
20
20
0.1
40
0.3
MAX
×1.01
+20
7.5
40
40
2
0.3
0.90
0.60
0.21
0.17
0.14
0.13
1.00
0.80
0.36
0.30
0.25
0.23
V
0.02
0.30
%/V
-40°С≤TOPR≤85°С
±30
ppm/°С
VIN=4.0,VCE=0V
70
Ω
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
TYP
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QW-R502-320.M
LR1122D

CMOS IC
TEST CIRCUIT
VIN
C1
1.0µF
CE
VIN
VOUT
UTC
LR1122D
C2
1.0µF
V
VOUT
GND
Basic Test Circuit

IOUT
A ISS
VOUT
UTC
LR1122D
C1
1.0µF
CE
C2
1.0µF
GND
Test Circuit for Supply Current
TYPICAL APPLICATION CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 7
QW-R502-320.M
LR1122D

CMOS IC
TYPICAL CHARACTERISTICS
Output Voltage vs. Output Current
2.4
Output Voltage vs. Temperature
2.05
(VIN=3V)
2.04
2.03
Output Voltage, VOUT (V)
1.6
1.2
0.8
VOUT=2V
VIN=3V
VIN=4V
VIN=5V
0
0
50
100
150
200
250
300
2.01
2.00
1.99
1.98
1.97
1.96
VOUT=2V
1.95
350
400
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Temperature, TOPR (°С)
Output Current, IOUT (mA)
Dropout Voltage vs. Output Current
450
Input Transient Response
3.0
300
200
150
100
TA=25°C
VOUT=2V
0
0
50
100
150
VOUT=2V
IOUT =30mA
tR = tF = 5µs
10mV/div
250
50
Output Voltage
200
0
20
40
60
Output Current, IOUT (mA)
Load Transient Response
VOUT=2V
VIN=3V
80 100 120 140 160 180 200
Time, t (µs)
Output Voltage
0
20
40
60
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
100
0
Output Current 10mA
150mA
50mV/div
0
20mV/div
100mA
200
Output Voltage, VOUT (V)
50
Output Current, IOUT (mA)
100
Output Current 50mA
80 100 120 140 160 180 200
Time, t (µs)
Load Transient Response
150
Output Voltage, VOUT (V)
4.0
Input Voltage
350
Output Voltage, VOUT (V)
Dropout Voltage, VD (mV)
400
Input Voltage, VIN (V)
0.4
2.02
Output Current, IOUT (mA)
Output Voltage, VOUT (V)
2.0
VOUT=2V
VIN=3V
80 100 120 140 160 180 200
Time, t (µs)
Output Voltage
0
20
40
60
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QW-R502-320.M
LR1122D
2
0
3
Output Voltage
1
0
0
20
40
60
80
CE Input Voltage
3
2
Output Voltage
1
0
0
20
40
60
Time, t (µs)
0
3
2
Output Voltage
1
0
0
20
40
60
80
3
2
Output Voltage
1
0
0
50
100
2
Output Voltage
0
150
150
200
200
250
300
Time, t (µs)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Turn Off Speed With CE Pin
250
300
IOUT = 150mA
VOUT=2.5V
CE Input Voltage
4
2
0
Output Voltage, VOUT (V)
Output Voltage, VOUT (V)
3
CE Input Voltage, VCE (V)
2
0
100
2
0
100
IOUT = 30mA
4
VOUT=2.5V
CE Input Voltage
50
4
Time, t (µs)
Turn Off Speed With CE Pin
0
IOUT = 0mA
CE Input Voltage
Time, t (µs)
1
100
VOUT=2.5V
Output Voltage, VOUT (V)
2
CE Input Voltage, VCE (V)
Output Voltage, VOUT (V)
CE Input Voltage
80
Turn Off Speed With CE Pin
6
4
2
0
100
IOUT=150mA
Turn On Speed With CE Pin
6
4
Time, t(µs)
VOUT=2.5V
IOUT=30mA
3
CE Input Voltage, VCE (V)
Output Voltage, VOUT (V)
CE Input Voltage
Output Voltage, VOUT (V)
4
2
Turn On Speed With CE Pin
VOUT=2.5V
6
VOUT=2.5V
CE Input Voltage, VCE (V)
IOUT=0mA
Turn On Speed With CE Pin
CE Input Voltage, VCE (V)
TYPICAL CHARACTERISTICS(Cont.)
CE Input Voltage, VCE (V)

CMOS IC
2
1
Output Voltage
0
0
50
100
150
200
250
300
Time, t (µs)
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QW-R502-320.M
LR1122D
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
7 of 7
QW-R502-320.M
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