Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR3XXYYB
CMOS IC
150mA 2CH LDO REGULATOR

DESCRIPTION
The UTC LR3XXYYB are CMOS voltage regulator ICs that have
high output voltage accuracy, low dropout, low supply current, and
high ripple rejection. Every voltage regulator IC of UTC LR3XXYYB
series consists of an error amplifier, a voltage reference unit, a
current limit circuit, resistors for setting output voltage, and a chip
enable circuit.
Due to built-in transistor with low ON resistance and a chip
enable function these ICs perform with low dropout voltage prolongs
the battery life of each system. The load transient response and line
transient response of the UTC LR3XXYYB Series are excellent, so
these ICs are suitable for hand-held communication equipment
power supply.
6
5
4
1
2
3
SOT-26
FEATURES

*
*
*
*
*
*
*
*
Low supply current: Typ. 60µA
Standby mode:
Typ. 0.1µA
Low dropout voltage
High ripple rejection
Low temperature-drift coefficient of output voltage
Excellent line regulation
High output voltage accuracy
Output voltage stepwise setting with a step of 0.1V in the range of
1.5V ~ 3.3V is possible
* Built-in fold-back protection circuit Typ. 40mA
(current at short mode)
* Ceramic capacitor is recommended. (1.0µF or more)

ORDERING INFORMATION
Note:
Ordering Number
LR3XXYYBG-AG6-R
XXYY: Output Voltage, refer to Marking Information.
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Copyright © 2015 Unisonic Technologies Co., Ltd
Package
SOT-26
Packing
Tape Reel
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LR3XXYYB
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CMOS IC
MARKING INFORMATIONS
PACKAGE
SOT-26
VOLTAGE CODE
XX
YY
12:1.2V
18:1.8V
12:1.2V
28:2.8V
15:1.5V
30:3.0V
15:1.5V
28:2.8V
15:1.5V
33:3.3V
18:1.8V
12:1.2V
18:1.8V
25:2.5V
18:1.8V
28:2.8V
18:1.8V
30:3.0V
18:1.8V
33:3.3V
28:2.8V
12:1.2V
28:2.8V
15:1.5V
28:2.8V
18:1.8V
28:2.8V
33:3.3V
29:2.9V
19:1.9V
33:3.3V
15:1.5V
33:3.3V
18:1.8V
33:3.3V
28:2.8V
33:3.3V
33:3.3V

PIN CONFIGURATIONS

PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
PIN NAME
EN1
VIN
EN2
VOUT2
GND
VOUT1
MARKING
DESCRIPTION
Channel 1’s output enable control Pin
Voltage Input pin
Channel 2’s output enable control Pin
Channel 2’s voltage output
Ground
Channel 1’s voltage output
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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
CMOS IC
BLOCK DIAGRAM
EN1 1
VREF
6
VOUT1
5
GND
4
VOUT2
R1-1
R2-1 Current Limit
VIN
2
Current Limit
R2-2
VREF
R1-2
EN2
3
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CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
6.5
V
Input Voltage (EN)
VEN
6.5
V
Output Voltage
VOUT
-0.3 ~ VIN + 0.3
V
Output Current
IOUT1+ IOUT2
700
mA
Power Dissipation
PD
420
mW
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-55 ~ +125
°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.

THERMAL DATA
PARAMETER
Junction to Ambient

SYMBOL
θJA
RATING
250
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage
SYMBOL
TEST CONDITIONS
VIN=Set VOUT+1V, 1mA≤IOUT≤30mA
VOUT
Output Current
Load Regulation
Line Regulation
Dropout Voltage
Supply Current
Supply Current (Standby)
IOUT
∆VLOAD
∆VLINE
VD
ISS
ISTN-BY
Power Supply Ripple
Rejection
PSRR
MIN
VOUT
×0.98
150
TYP
VIN−VOUT=1.0V
VIN=Set VOUT+1V, 1mA≤IOUT≤150mA
15
Set VOUT+0.5V≤VIN≤6.0V, IOUT=30mA
0.02
Refer to the Electrical Characteristics by Output Voltage
VIN=Set VOUT+1V (Both LDOs)
90
VIN=Set VOUT+1V VCE=GND
0.1
Ripple 0.5Vp−p, VIN=Set VOUT+1V
75 (Note1)
IOUT=30mA (In case that VOUT≤1.7V,
65 (Note2)
VIN=Set VOUT+1.2V)
2.0
Input Voltage
VIN
∆VOUT
Output Voltage
IOUT=30mA, -40°C≤TOPR≤85°C
∆TOPR
Temperature Coefficient
Short Current Limit
ISC(LIMIT) VOUT=0V
Pull-Down Resistance for
RPD
EN Pin
EN Input Voltage “H”
VCEH
EN Input Voltage “L”
VCEL
Output Noise
eN
BW=10Hz ~100kHz
Low Output Nch Tr. ON
RLOW
VCE=0V
Resistance (of B version)
Notes: 1. f=1kHz, 70dB as to VOUT≥2.5V Output type
2. f=10kHz, 60dB as to VOUT≥2.5V Output type

UNIT
°C/W
0.7
MAX
VOUT
×1.02
UNIT
V
40
0.10
mA
mV
%/V
120
1.0
µA
µA
dB
6.0
V
±100
ppm /°C
40
mA
2.0
8.0
MΩ
0.3
30
V
V
µVrms
60
Ω
1.5
ELECTRICAL CHARACTERISTICS BY OUTPUT VOLTAGE
Output Voltage VOUT (V)
VOUT=1.2
VOUT=1.5
VOUT=1.6
VOUT=1.7
1.8≤VOUT≤2.0
2.1≤VOUT ≤2.7
2.8≤VOUT≤3.3
CONDITION
IOUT=150mA
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Dropout Voltage, VD (V)
TYP
0.40
0.38
0.35
0.33
0.32
0.28
0.22
MAX
0.75
0.70
0.65
0.60
0.55
0.50
0.35
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CMOS IC
TEST CIRCUITS
UTC
LR3XXYYB
EN2
VOUT2
C3
1μF
GND
VIN
IOUT2
C1
1μF
EN1
V VOUT2
VOUT1
C2
1μF
V
VOUT1
IOUT1
Fig.1 Standard Test Circuit
Fig.2 Supply Current Test Circuit
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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
CMOS IC
TEST CIRCUITS(Cont.)
Fig.3 Ripple Rejection, Line Transient Response Test Circuit
Fig.4 Load Transient Response Test Circuit
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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
CMOS IC
TYPICAL APPLICATION CIRCUIT
UTC
LR3XXYYB
IN
EN2
VOUT2
GND
VIN
EN1
VOUT1
OUT2
C3
1μF
C1
1μF
C2
OUT1
1μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R125-002.H
LR3XXYYB
CMOS IC
Output Voltage, VOUT (V)
Input Voltage,
VIN (V)
Output Current,
IOUT (A)
Output Current,
IOUT (A)
Output Voltage, VOUT (V)
Input Voltage,
VIN (V)
Output Voltage, VOUT (V)
Output Voltage, VOUT (V)
TYPICAL CHARACTERISTICS

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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