WL2801E
WL2801E
Low noise, High PSRR, High speed, CMOS LDO
Http://www.willsemi.com
Descriptions
The WL2801E series is a high accuracy, low noise,
high speed, low dropout CMOS Linear regulator with
high ripple rejection. The devices offer a new level of
cost effective performance in cellular phones, laptop
and notebook computers, and other portable devices.
The current limiter's fold-back circuit also operates
as a short circuit protection and an output current
limiter at the output pin.
The WL2801E regulators are available in standard
SOT-23-5L packages. Standard products are Pb-free
and Halogen-free.
SOT-23-5L
Features
PSRR
Dropout voltage
Input voltage
Output range
Output current
: 2.7V~5.5V
: 1.2V~3.3V
: 200mA (@Vout<2V)( Typ.)
300mA (@Vout>2V)( Typ.)
: 75dB @ 217Hz
: 170mV @ I
OUT
=200mA
Pin Configuration (Top View)
Quiescent current : 70μA Typ.
Shut-down current : < 0.1μA
Recommend capacitor : 1uF
****
****
Applications
MP3/MP4 Players
Cellphones, radiophone, digital cameras
Bluetooth, wireless handsets
Others portable electronics device
For detail marking information, please see page 9.
Marking
Order Information
For detail order information, please see page 9.
Will Semiconductor Ltd.
1
Nov. 2015 – Rev.3.4
WL2801E
Absolute Maximum Ratings
Parameter
Power Dissipation
V
IN
Range
V
EN
Range
V
OUT
Range
Lead Temperature Range
Storage Temperature Range
Operating Junction Temperature Range
Value
Internal limited
-0.3½6.5
-0.3½V
IN
-0.3½V
IN
260
-55 ~ 150
150
Unit
mW
V
V
V
o
C
C
C
o
o
Recommend Operating Ratings
Parameter
Operating Supply voltage
Operating Temperature Range
Thermal Resistance, R
θJA
Value
2.7½5.5
-40½85
250
Unit
V
o
C
o
C/W
Electronics Characteristics
(Ta=25
o
C, V
IN
=V
OUT
+1V, C
IN
=C
OUT
=1uF, unless otherwise noted)
Parameter
Symbol
Condition
V
OUT
<2V, V
IN
=2.7V, I
OUT
=1mA
Output Voltage
V
OUT
V
OUT
≧2V,
I
OUT
=1mA
Current Limit
I
LIM
V
EN
=V
IN
V
OUT
=2.8V, I
OUT
=200mA
V
OUT
=2.8V, I
OUT
=300mA
V
IN
=2.7~5.5V, I
OUT
=1mA
V
OUT
=2.8V , I
OUT
=1~300mA
V
OUT
=2.8V, I
OUT
=0
V
EN
=V
IN,
V
OUT
Short to GND with 1
Ω
V
EN
=0V
V
IN
=(V
OUT
+1V)
DC
+0.5V
P-P
Power Supply Rejection Rate
PSRR
F=217Hz ,Iout=10mA
V
IN
=(V
OUT
+1V)
DC
+0.5V
P-P
F=10KHz, Iout=10mA
EN logic high voltage
EN logic low voltage
EN Input Current
Output Noise Voltage
V
ENH
V
ENL
I
EN
e
NO
V
IN
=5.5V, I
OUT
=1mA
V
IN
=5.5V, V
OUT
=0V
V
EN
= 0 to 5.5V
10Hz to 100KHz, C
OUT
=1
μF
100
1.2
0.4
1.0
Min.
0.97
V
OUT
0.98
V
OUT
Typ.
V
OUT
V
OUT
Max.
1.03
V
OUT
1.02
V
OUT
Unit
V
Ref. to Output Voltage vs.
Output Current Chart
170
250
0.01
20
70
170
0.1
75
1.0
200
300
0.15
30
100
mA
Dropout Voltage
Line Regulation
Load Regulation
Quiescent Current
Short Current
Shut-down Current
V
DROP
△V
LINE
△V
Load
I
Q
I
SHORT
I
SHDN
mV
%/V
mV
μA
mA
μA
dB
65
V
V
μA
μV
RMS
Will Semiconductor Ltd.
3
Nov. 2015 – Rev.3.4
WL2801E
Typical characteristics
(Ta=25
o
C, V
IN
=V
OUT
+1V, C
IN
=C
OUT
=1uF, unless otherwise noted)
90
80
80
70
Quiescent Current (uA)
60
50
40
30
20
10
V
OUT
=2.8V
I
O
=0mA
Quiescent Current(uA)
70
60
50
40
30
20
10
V
OUT
=1.2V
I
O
=0mA
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
Quiescent current vs. Supply voltage
3.00
2.75
2.50
1.4
1.2
Input Voltage(V)
Quiescent current vs. Supply voltage
I
O
=1mA
I
O
=200mA
Output Voltage(V)
1.75
1.50
1.25
1.00
0.75
0.50
I
O
=1mA
I
O
=200mA
Output Voltage(V)
2.25
2.00
1.0
0.8
0.6
0.4
0.2
0.25
0.00
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage(V)
Output voltage vs. Supply voltage
Input Voltage(V)
Output voltage vs. Supply voltage
o
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
200
400
600
800
1.4
1.2
T
A
= -40 C
T
A
= -40 C
o
Output Voltage (V)
Output Voltage (V)
1.0
0.8
0.6
0.4
0.2
0.0
0
100
200
300
400
VIN = 2.7V
VIN = 4.2V
VIN = 5.5V
500
600
700
VIN = 3.8V
VIN = 4.2V
VIN = 5.5V
1000 1200 1400
Output Current (mA)
Output voltage vs. Output current
Will Semiconductor Ltd.
4
Output Current (mA)
Output voltage vs. Output current
Nov. 2015 – Rev.3.4
WL2801E
3.0
2.5
Output Voltage (V)
T
A
= 25 C
o
1.4
1.2
T
A
= 25 C
o
2.0
1.5
1.0
0.5
0.0
0
200
400
600
800
VIN = 3.8V
VIN = 4.2V
VIN = 5.5V
Output Voltage (V)
1.0
0.8
0.6
0.4
0.2
0.0
0
100
200
300
VIN = 2.7V
VIN = 4.2V
VIN = 5.5V
400
500
1000 1200 1400
Output Current (mA)
Output voltage vs. Output current
3.0
2.5
T
A
= 85 C
Output Voltage (V)
o
Output Current (mA)
Output voltage vs. Output current
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
100
200
300
VIN = 2.7V
VIN = 4.2V
VIN = 5.5V
400
500
T
A
= 85 C
o
Output Voltage (V)
2.0
1.5
1.0
0.5
0.0
0
200
400
600
800
VIN = 3.8V
VIN = 4.2V
VIN = 5.5V
1000 1200 1400
Output Current (mA)
Output voltage vs. Output current
100
90
80
70
PSRR(dB)
100
90
80
70
60
50
40
30
20
10
0
10
Output Current (mA)
Output voltage vs. Output current
50
40
30
20
10
0
10
100
V
IN
= 3.8V+0.5V
P-P
V
OUT
= 2.8V
I
OUT
= 10mA
1000
Frequency(HZ)
10000
PSRR(dB)
60
V
IN
= 3.0V+0.5V
P-P
V
OUT
= 1.2V
I
OUT
= 10mA
100
1000
Frequency(HZ)
10000
PSRR
Will Semiconductor Ltd.
5
PSRR
Nov. 2015 – Rev.3.4
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