UNISONIC TECHNOLOGIES CO., LTD
LR9101
LOW NOISE 300mA LDO
REGULATOR
DESCRIPTION
CMOS IC
The UTC
LR9101
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
LR9101,
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
LR9101
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
LR9101.
The UTC
LR9101
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
* Supply Current:
25µA (Typ.)
* Standby Mode:
0.1µA (Typ.)
* Ripple Rejection:
70dB (Typ.) @ f=1kHz,V
OUT
=2.5V
* Well Line Regulation: 0.02%/ V (Typ.)
* C
IN
=C
OUT
=1µF or more (Ceramic capacitors) are recommended to
be used with this IC
ORDERING INFORMATION
Ordering Number
Package
SOT-23-3
SOT-23
SOT-23-5
SOT-25
SOT-343
SOT-353
Packing
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Lead Free
Halogen Free
LR9101L-xx-AE2-R
LR9101G-xx-AE2-R
LR9101L-xx-AE3-R
LR9101G-xx-AE3-R
LR9101L-xx-AE5-R
LR9101G-xx-AE5-R
LR9101L-xx-AF5-R
LR9101G-xx-AF5-R
LR9101L-xx-AL4-R
LR9101G-xx-AL4-R
LR9101L-xx-AL5-R
LR9101G-xx-AL5-R
Note: xx: Output Voltage, refer to Marking Information.
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Copyright © 2021 Unisonic Technologies Co., Ltd
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QW-R502-A14.N
LR9101
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
L: Lead Free
G: Halogen Free
Voltage Code
CMOS IC
SOT-23
SOT-23-3
R1XX
10: 1.0V
12: 1.2V
15: 1.5V
18: 1.8V
25: 2.5V
27: 2.7V
28: 2.8V
29: 2.9V
30: 3.0V
33: 3.3V
Voltage
Code
1
SOT-23-5
SOT-25
SOT-353
4
1XX
3
L: Lead Free
G: Halogen Free
2
SOT-343
PIN CONFIGURATION
SOT-23/SOT-23-3
SOT-23-5/SOT-25
SOT-353
SOT-343
PIN DESCRIPTION
PIN NO.
SOT-23-5
SOT-25
SOT-353
5
2
1
3
4
SOT-23
SOT-23-3
1
2
3
-
-
SOT-343
3
2
4
1
-
PIN NAME
V
OUT
GND
V
IN
CE
NC
DESCRIPTION
Output Pin
Ground Pin
Input Pin
Chip Enable Pin. Active when this Pin is high.
No Connection
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QW-R502-A14.N
LR9101
BLOCK DIAGRAM
For SOT-23-5/SOT-25/SOT-343/SOT-353 Package
CMOS IC
V
IN
V
OUT
-
+
Reference
Voltage
CE
Current Limit
GND
For SOT-23 Package
V
IN
V
OUT
-
+
Reference
Voltage
Current Limit
GND
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QW-R502-A14.N
LR9101
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
V
IN
V
CE
V
OUT
I
OUT
CMOS IC
RATINGS
UNIT
Input Voltage
6
V
Input Voltage (CE Pin)
6
V
Output Voltage
-0.3 ~ V
IN
+0.3
V
Output Current
400
mA
SOT-23/SOT-23-3
280
mW
SOT-23-5/SOT-25
300
mW
Power Dissipation
P
D
SOT-343
250
mW
SOT-353
260
mW
Junction Temperature
T
J
+125
°С
Operating Temperature
T
OPR
-40 ~ +85
°С
Storage Temperature
T
STG
-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
MIN
×0.99
TYP
±20
20
300
25
0.1
200
0.3
1.5
1.1
30
70
0.60
0.40
0.24
0.21
0.19
0.17
0.15
0.02
0.10
2
6
40
MAX
×1.01
UNIT
V
mV
V
mV
mA
µA
µA
mA
µA
V
V
µVrms
dB
(T
A
=25°С, V
IN
=Set V
OUT
+1V, I
OUT
=1mA, C
I
=C
O
=1µF, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
V
OUT
> 2.0V
Output Voltage
V
OUT
V
IN
= Set V
OUT
+1V,
V
OUT
≤
2.0V
Input Voltage
V
IN
Load Regulation
∆V
OUT
1mA≤I
OUT
≤150mA
Output Current
I
OUT
Supply Current
I
SS
I
OUT
=0A
Supply Current (Standby)
I
ST-BY
V
CE
=0V
Short Current Limit
I
LIMIT
V
OUT
=0V
CE Pull-down Current
I
PD
High
V
CEH
CE Input Voltage
Low
V
CEL
Output Noise
eN
B
W
=10Hz to 100kHz, I
OUT
=30mA
f=1kHz, Ripple 0.2V
RMS
V
IN
=Set V
OUT
+1V, I
OUT
=30mA
Ripple Rejection
RR
(In case that V
OUT
=2.0V, V
IN
=3V)
1.0V≤V
OUT
<1.2V
1.2V≤V
OUT
<1.5V
1.5V≤V
OUT
<1.7V
Dropout Voltage
V
D
I
OUT
=150mA 1.7V≤V
OUT
<2.0V
2.0V≤V
OUT
<2.5V
2.5V≤V
OUT
<2.8V
2.8V≤V
OUT
≤5.0V
∆V
OUT
1.2V≤V
OUT
≤4.0V,
Line Regulation
∆V
IN
V
SET
+0.5V≤V
IN
≤5V
V
%/V
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QW-R502-A14.N
LR9101
TEST CIRCUIT
CMOS IC
V
IN
C1
1.0µF
CE
UTC
LR9101
V
OUT
C2
1.0µF
V
V
OUT
I
OUT
C1
1.0µF
V
IN
V
OUT
UTC
LR9101
C2
1.0µF
A I
SS
GND
CE
GND
Basic Test Circuit
Test Circuit for Supply Current
TYPICAL APPLICATION CIRCUIT
IN
V
IN
CE
UTC
LR9101
GND
V
OUT
OUT
C2
1.0μF
C1
1.0μF
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. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
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QW-R502-A14.N
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