Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR6401
CMOS IC
DUAL CHANNEL LDO
REGULATORS WITH ENABLE
FUNCTION
6
5
4
1

3
DESCRIPTION
SOT-26
The UTC LR6401 is a low noise and high accuracy LDO voltage
regulator which has enable soft start function. Designers can reduce
power consumption more easily by applying EN function that can
turn off the output of each device and control the in rush current
through the soft the start function.
The UTC LR6401 comes with low design cost and outstanding
output stability and its compatibility of working with low ESR ceramic
capacitors is undoubted. Besides, and this level of stability is
ensured by the perfect transient response and PSRR derived from a
large frequency range.

2
1
DFN-6 (1.8×2.0)
FEATURES
* VD=150mV @100mA (Typ.), VOUT ≥2.8V
* Range of Operating Voltage:2.5V ~ 6.0V
* Range of Output Voltage Range:1.2V ~ 4.0V
* Range of Output Current:300mA / Channel
* Low Power Consumption:30μA (Typ.) for Each Channel
* Standby Current:0.1μA (Typ.)
* Accurate:±2%
* High PSRR: 65 dB
* Each Channel Output Current Limit Protection:450mA
* With Short Circuit Protection
* Output ON/OFF Control Function

ORDERING INFORMATION
Ordering Number
LR6401xG-AG6-R
LR6401xG-K06-1820-R
Note: x: Output Voltage, refer to Marking Information.
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Copyright © 2015 Unisonic Technologies Co., Ltd
Package
SOT-26
DFN-6(1.8×2.0)
Packing
Tape Reel
Tape Reel
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LR6401
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CMOS IC
MARKING INFORMATION
PACKAGE
SOT-26
DFN-6(1.8×2.0)
VOLTAGE
VOLTAGE CODE
1.8V + 3.3V
1.8V + 2.8V
2.5V + 3.3V
2.8V + 3.3V
2.8V + 1.8V
3.3V + 2.8V
2.85V + 2.85V
1.2V + 2.8V
1.5V + 2.8V
1.2V + 1.8V
A
B
C
D
E
F
H
M
N
P

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO.
SOT-26
DFN-6(1.8×2.0)
1
1
2
2
3
3
4
6
5
4
6
5
PIN NAME
EN1
VIN
EN2
VOUT2
GND
VOUT1
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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
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CMOS IC
BLOCK DIAGRAM
VIN
EN1
ON/OFF
Control
Thermal
Shutdown
Voltage
Reference
ER
+
Current
Limit
Channel 1
VOUT1
R11
R12
EN2
ON/OFF
Control
Thermal
Shutdown
Voltage
Reference
Channel 2
ER
+
Current
Limit
VOUT2
R21
R22
GND
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
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VIN
VEN
VOUT
IOUT1+IOUT2
RATINGS
UNIT
7.0
V
VSS-0.3~VIN+0.3
V
VSS-0.3~VIN+0.3
V
700
mA
SOT-26
400
Power Dissipation
PD
mW
DFN-6(1.8×2.0)
1000
Junction Temperature
TJ
150
°C
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.
Input Voltage
EN Pin Voltage
Output Voltage
Output Current

THERMAL DATA
PARAMETER
Junction to Ambient

SYMBOL
SOT-26
DFN-6(1.8×2.0)
θJA
RATINGS
250
100
UNIT
°C/W
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise specified.) (Note 3)
PARAMETER
Input Voltage
SYMBOL
VIN
Output Voltage
VOUT
Line Regulation
∆VOUT
∆VIN × VOUT
Load Regulation
∆VOUT
Output Current
Supply Current
Standby Current
Current Limite
Short-Circuit Current
Dropout Voltage
IOUT
ISS
ISTN-BY
ILIMIT
ISC
VD
TEST CONDITIONS
VIN=VOUT+1.0V, IOUT=30mA
VOUT+1.0V≤VIN≤6.0V
IOUT=1mA
VIN=VOUT+1.0V,
1mA ≤ IOUT ≤ 150mA
VIN=VOUT+1.0V,
1mA ≤ IOUT ≤300mA
VOUT+1.0V≤VIN≤6V (Note 1)
VIN=VEN=VOUT+1.0V, IOUT=0mA
VIN=VOUT+1.0V, VEN=VSS
VIN=VOUT+1.0V, VIN=VEN
VIN=VOUT+1.0V, VIN=VEN
VOUT=1.2V
IOUT=100mA
VOUT>1.2V
IOUT=300mA
(Note 2)
(Note 2)
MIN
2.5
VOUT
×0.98
TYP
MAX
6.0
VOUT
×1.02
UNIT
V
0.02
0.1
%/V
13
60
mV
30
90
mV
VOUT
300
60
0.1
450
150
310
150
450
90
1
350
250
750
V
mA
μA
μA
mA
mA
mV
mV
mV
V
V
High
VIH
1.2
Low
VIL
0.4
Temperature Coefficient of
TCVO
IOUT=30mA, -25°C≤TOPR≤+85°C
±100
ppm/°C
Output Voltage
Over Temperature Shutdown
OTS
150
°C
Over Temperature Hysteresis
OTH
40
°C
Power Supply Rejection Rate
PSRR
IOUT=30mA, F=100Hz
65
dB
Notes: 1. Measured using a double sided board with 1” x 2” square inches of copper area connected to the GND pins
for “heat spreading”.
2. EN pin input voltage must be always less than or equal to input voltage.
3. The minimum operating VIN Value is equal to [VOUT (NOM)+ VDROPOUT] or 2.5V, just the greater.
EN Pin Input Voltage
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LR6401

CMOS IC
TYPICAL APPLICATION CIRCUIT
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CMOS IC
TYPICAL CHARACTERISTICS
Output Voltage vs. Input Voltage
Dropout Voltage vs. Output Current
800
VOUT=3.3V
TA=25°C
IOUT=0~400mA
CIN=COUT=1μF
600
VOUT=1.8V
TA=25°C
CIN=COUT=1μF
1.825
Output Voltage,VOUT (V)
700
Dropout Voltage,VD (mV)
1.83
500
400
300
200
100
1.82
1.815
1.81
1.805
IOUT=30mA
IOUT=0mA
1.80
1.795
0
0
50 100 150 200 250 300 350 400 450
Output Current,IOUT (mA)
1.79
3.5
Output Current,
IOUT2 (mA)
3.315
IOUT=100mA
IOUT=30mA
3.31
IOUT=0mA
3.305
3.30
3.295
3.29
3.5
4.0
4.5
5.0
5.5
Input Voltage,VIN (V)
5.5
6.0
100mA
50
10mA
0
10
50
-50
0
-10
IOUT1=0mA
IOUT2=10mA~100mA
0
6.0
VIN=4.3V
TA=25°C
CIN=COUT=1μF
0.5
1.0
Time (ms)
Input Transient Reponse (VOUT=1.8V)
Input Voltage,
VIN (V)
Input Transient Reponse (VOUT=1.8V)
3.8
2.8
IOUT=1mA
TA=25°C
CIN=COUT=1μF
Output Voltage,
VOUT (mV)
Input Voltage,
VIN (V)
5.0
0
Output Voltage,
VOUT1(1.8V) (mV)
Output Voltage,VOUT (V)
3.32
4.5
Cross Talk
VOUT=3.3V
TA=25°C
CIN=COUT=1μF
3.325
4.0
Input Voltage,VIN (V)
Output Voltage vs. Input Voltage
3.33
Output Voltage,
VOUT (mV)
IOUT=100mA
Output Voltage,VOUT2 (3.3V) (mV)

20
0
3.8
2.8
IOUT=30mA
TA=25°C
CIN=COUT=1μF
50
0
-50
-20
0
0.5
Time (ms)
1.0
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0
0.5
1.0
Time (ms)
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CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
Input Voltage,
VIN (V)
Input Transient Reponse (VOUT=3.3V)
3.8
2.8
0
IOUT=100mA
TA=25°C
CIN=COUT=1μF
50
Output Voltage,
VOUT (mV)
Output Voltage,
VOUT (mV)
Input Voltage,
VIN (V)
Input Transient Reponse (VOUT=1.8V)
0
-50
0
0.5
Time (ms)
5.3
4.3
IOUT=1mA
TA=25°C
CIN=COUT=1μF
20
0
-20
0
1.0
Input Voltage,
VIN (V)
Input Transient Reponse (VOUT=3.3V)
5.3
4.3
IOUT=30mA
TA=25°C
CIN=COUT=1μF
50
Output Voltage,
VOUT (mV)
Output Voltage,
VOUT (mV)
Input Voltage,
VIN (V)
Input Transient Reponse (VOUT=3.3V)
0
-50
0
0.5
Time (ms)
5.3
4.3
0
IOUT=100mA
TA=25°C
CIN=COUT=1μF
50
0
-50
1.0
0
Output Voltage,
VOUT (mV)
20
0
CIN=COUT1=1μF
IOUT1=10mA~50mA
VIN=2.8V
50
10
0
0.5
Time (ms)
1.0
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0.5
Time (ms)
1.0
Load Transient Response (VOUT=1.8V)
Output Current,
IOUT (mA)
Output Current,
IOUT (mA)
Output Voltage,
VOUT (mV)
Load Transient Response (VOUT=1.8V)
-20
1.0
0.5
Time (ms)
50
0
-50
CIN=COUT1=1μF
IOUT1=10mA~100mA
VIN=2.8V
100
10
0
0.5
Time (ms)
1.0
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CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
Load Transient Response (VOUT=3.3V)
Output Voltage,
VOUT (mV)
20
0
-20
CIN=COUT1=1μF
IOUT1=10mA~50mA
VIN=4.3V
50
Output Current,
IOUT (mA)
Output Current,
IOUT (mA)
Output Voltage,
VOUT (mV)
Load Transient Response (VOUT=3.3V)
10
0
0.5
Time (ms)
1.0
50
0
-50
CIN=COUT1=1μF
IOUT1=10mA~100mA
VIN=4.3V
100
10
0
0.5
Time (ms)
1.0
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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