Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR9101
CMOS IC
LOW NOISE 300mA LDO
REGULATOR

DESCRIPTION
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:
50µA (Typ.)
* Standby Mode:
0.1µA (Typ.)
* Ripple Rejection:
70dB (Typ.) @ f=1kHz,VOUT=2.5V
* Well Line Regulation: 0.02%/ V (Typ.)
* CIN=COUT=1µF or more (Ceramic capacitors) are recommended to
be used with this IC

ORDERING INFORMATION
Note:
Ordering Number
LR9101G-xx-AE2-R
LR9101G-xx-AE3-R
LR9101G-xx-AE5-R
LR9101G-xx-AL4-R
LR9101G-xx-AL5-R
xx: Output Voltage, refer to Marking Information.
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
Package
SOT-23-3
SOT-23
SOT-23-5
SOT-343
SOT-353
Packing
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
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QW-R502-A14.K
LR9101

CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-23
SOT-23-3
MARKING
R1XXG
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
SOT-23-5
SOT-353
Voltage Code
SOT-343

PIN CONFIGURATION
SOT-23/SOT-23-3

SOT-23-5/SOT-353
SOT-343
PIN DESCRIPTION
SOT-23
SOT-23-3
3
1
2
PIN NO.
SOT-23-5
SOT-353
1
2
3
4
5
SOT-343
4
2
1
3
PIN NAME
VIN
GND
CE
NC
VOUT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
DESCRIPTION
Input Pin
Ground Pin
Chip Enable Pin. Active when this Pin is high.
No Connection
Output Pin
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QW-R502-A14.K
LR9101

CMOS IC
BLOCK DIAGRAM
For SOT-23-5/SOT-343/SOT-353 Package
VIN
VOUT
+
Reference
Voltage
Current Limit
CE
GND
For SOT-23 Package
VIN
VOUT
+
Reference
Voltage
Current Limit
GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-A14.K
LR9101

CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
Input Voltage
VIN
6
Input Voltage (CE Pin)
VCE
6
Output Voltage
VOUT
-0.3~ VIN+0.3
Output Current
IOUT
400
SOT-23/SOT-23-3
280
SOT-23-5
300
Power Dissipation
PD
SOT-343
250
SOT-353
260
Junction Temperature
TJ
+125
Operating Temperature
TOPR
-40~+85
Storage Temperature
TSTG
-55~+125
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.

UNIT
V
V
V
mA
mW
mW
mW
mW
°С
°С
°С
ELECTRICAL CHARACTERISTICS
(TA=25°С, VIN=Set VOUT+1V, IOUT=1mA, CI =CO=1µF, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
VOUT > 2.0V
Output Voltage
VOUT
VIN = Set VOUT+1V,
VOUT ≤ 2.0V
Input Voltage
VIN
Load Regulation
∆VOUT 1mA≤IOUT≤150mA
Output Current
IOUT
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
CE Input Voltage
Low
VCEL
Output Noise
eN
BW=10Hz to 100kHz, IOUT =30mA
f=1kHz, Ripple 0.2VRMS
VIN=Set VOUT+1V, IOUT=30mA
Ripple Rejection
RR
(In case that V OUT=2.0V, VIN=3V)
1.0V≤VOUT<1.2V
1.2V≤VOUT<1.5V
1.5V≤VOUT<1.7V
Dropout Voltage
VD
IOUT=150mA 1.7V≤VOUT<2.0V
2.0V≤VOUT<2.5V
2.5V≤VOUT<2.8V
2.8V≤VOUT≤5.0V
∆VOUT 1.2V≤VOUT≤4.0V,
Line Regulation
∆VIN
VSET+0.5V≤VIN≤5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
×0.99
TYP
MAX
×1.01
1.1
30
UNIT
V
mV
V
mV
mA
µA
µA
mA
µA
V
V
µVrms
70
dB
0.60
0.40
0.24
0.21
0.19
0.17
0.15
V
±20
20
6
40
300
50
0.1
200
0.3
2
1.5
0.02
0.10
%/V
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QW-R502-A14.K
LR9101

CMOS IC
TEST CIRCUIT
VIN
C1
1.0µF
VIN
VOUT
UTC
LR9101
C2
1.0µF
V
VOUT
IOUT
A ISS
Basic Test Circuit

C1
1.0µF
CE
GND
CE
VOUT
UTC
LR9101
C2
1.0µF
GND
Test Circuit for Supply Current
TYPICAL APPLICATION CIRCUIT
IN
C1
1.0μF
VOUT
VIN
CE
UTC
LR9101
GND
OUT
C2
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. 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-R502-A14.K
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