Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR4XXYY
Preliminary
CMOS IC
Dual,Low-Noise,200mA LDO
REGULATOR

DESCRIPTION
6
The UTC LR4XXYY are dual voltage regulator ICs that have
high output voltage accuracy, low dropout, low supply current, and
high ripple rejection. Every Channel of UTC LR4XXYY series
consists of a voltage reference unit and over temperature
protection, simultaneity; also consists of an error amplifier, a
current limit circuit, resistors for setting output voltage, and a chip
enable circuit, respectively. The EN1 and EN2 pins control each
output respectively, When both outputs shutdown simultaneously,
the chip will be turn off and consumes nearly zero operation
current which is suitable for battery-power devices.
The load transient response and line transient response of the
UTC LR4XXYY Series are excellent, so these ICs are suitable for
hand-held communication equipment power supply.
5
4
1
2
3
SOT-26
FEATURES

* 200mA Guaranteed Output Current(Each LDO)
* Dual Shutdown Pins Control Each Output
* 120mV Dropout at 100mA Load
* Current Limiting Protection
* Thermal Shutdown Protection
* Excellent Line/Load Transient
* RoHS Compliant and 100% Lead (Pb)-Free

ORDERING INFORMATION
Note:
Ordering Number
LR4XXYYG-AG6-R
XXYY: Output Voltage, refer to Marking Information.
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Copyright © 2014 Unisonic Technologies Co., Ltd
Package
SC59-6
Packing
Tape Reel
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LR4XXYY

Preliminary
CMOS IC
MARKING INFORMATIONS
PACKAGE
Code
SOT-26
A
B
C
D
E
F
VOLTAGE CODE
XX
YY
28: 2.8V
28: 2.8V
30: 3.0V
30: 3.0V
12: 1.2V
18: 1.8V
18: 1.8V
28: 2.8V
18: 1.8V
33: 3.3V
33: 3.3V
18: 1.8V

PIN CONFIGURATIONS

PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
PIN NAME
VOUT2
GND
EN2
EN1
VIN
VOUT1
MARKING
DESCRIPTION
Channel 2’s voltage output
Ground
Channel 2’s output enable control Pin
Channel 1’s output enable control Pin
Voltage Input pin
Channel 1’s voltage output
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LR4XXYY

Preliminary
CMOS IC
BLOCK DIAGRAM
EN1 4
VREF
6
VOUT1
2
GND
1
VOUT2
R1-1
R2-1 Current Limit
VIN
5
Current Limit
R2-2
VREF
R1-2
EN2
3
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LR4XXYY

Preliminary
ABSOLUTE MAXIMUM RATINGS (Note 1)
PARAMETER
Supply Input Voltage(Operating)
Supply Input Voltage(Survival)
Enable Input Voltage
Lead Temperature (Soldering, 10 sec.)
ESD Rating (Note 2)
Junction Temperature
Storage Temperature Range
Operation Temperature Range

CMOS IC
SYMBOL
VIN
VEN
TJ
TSTG
TOPR
RATINGS
2.5 ~ 5.5
-0.3 ~ +6.5
0 ~ 5.5
+260
2
-40 ~ +125
-65 ~ +150
-40 ~ +85
UNIT
V
V
°C
kV
°C
°C
°C
ELECTRICAL CHARACTERISTICS
(VIN = VOUT+0.5V or 2.5V, CIN = COUT = 2.2μF, EN1=EN2=VIN, TA= 25°C, for each LDO unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Output Voltage Accuracy
∆VOUT
IOUT=1mA to 200mA
-2
+2
%
(Load Regulation)
Maximum Output Current
IMAX
Continous
200
mA
Current Limit
ILIM
RLOAD=1Ω
500
1000
mA
No Load
165
260
μA
Quiescent Current
IG
IOUT=100mA(Both LDOs)
165
260
μA
IOUT=1mA
20
mV
IOUT=100mA
120
mV
Dropout Voltage(Note3)
VDROP
IOUT=200mA
255
mV
VIN=(Vout+0.5V or 2.5V) to 5.5V
-0.2
+0.2
%/V
Line Regulation
∆VLINE
IOUT=1mA
VIN=2.5V to 5.5V
1.6
V
En Input High Threshold
VIH
VIN=2.5V to 5.5V
0.4
V
En Input Low Threshold
VIL
En Input Bias Current
ISD
EN=GND or VIN
100
nA
EN1=EN2=GND
Shutdown Supply Current
IGSD
0.01
2
μA
Thermal Shutdown Temperature
TSD
140
°C
Thermal Shutdown Hysteresis
∆TSD
10
°C
10~100kHz,COUT=4.7μF,
124
μVRMS
Output Voltage Noise
eNO
ILOAD=1mA
100Hz,COUT=4.7μF
Output Voltage AC PSRR
PSRR
62
dB
ILOAD=100mA
Notes:1. Limits beyond which damage to the device may occur is indicated by absolute maximum ratings.
Conditions for which the device is intended to be functional is indicated by operating ratings, but specific
performance` limits isn’t be guaranteed. Only for the test conditions listed the guaranteed specifications
can be applied. When the device is not operated under the listed test conditions some performance
characteristics may degrade.
2. Which discharged through a 1.5kΩ resistor into each pin is a 100pF capacitor in the human body model.
3. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.
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LR4XXYY

Preliminary
CMOS IC
TEST CIRCUITS
Fig.1 Standard Test Circuit
EN2
VOUT2
C3
2.2μF
A ISS
C1
2.2μF
GND
VIN
EN1
VOUT1
C2
2.2μF
Fig.2 Supply Current Test Circuit
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
Preliminary
CMOS IC
TEST CIRCUITS(Cont.)
EN2
VOUT2
C3
2.2μF
Pulse
Generator PG
GND
VIN
EN1
VOUT1
IOUT2
C2
2.2μF
IOUT1
Fig.3 Ripple Rejection, Line Transient Response Test Circuit
Fig.4 Load Transient Response Test Circuit
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LR4XXYY

Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
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.
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