WL2820D
WL2820D
Low noise, High PSRR, High speed, CMOS
LDO
Http://www.sh-willsemi.com
Descriptions
The WL2820D 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 WL2820D has the fold-back maximum output
current which depends on the output voltage. So the
current limit functions both as a short circuit protection
and as an output current limiter.
The WL2820D regulators are available in standard
DFN1x1-4L Package. Standard products are Pb-free
and Halogen-free.
DFN1X1-4L
Features
Input voltage
Output range
Output current
PSRR
Dropout voltage
: 2.2V~5.5V
: 1.0V~3.3V
: 300mA
: 70dB @ 217Hz
: 250mV @ I
OUT
=300mA
Pin Configuration (Top View)
Quiescent current : 42μA Typ.
Shut-down current : < 1μA
Discharge Resistance : 100Ω
Recommend capacitor : 1uF
E: Package Code
* : Voltage Code
Y : Year Code
W: Week Code
For detail marking information, please see page 10.
Applications
MP3/MP4 Players
Cellphones, radiophone, digital cameras
Bluetooth, wireless handsets
Others portable electronics device
Marking
Order Information
For detail order information, please see page 10.
Will Semiconductor Ltd.
1
Jun, 2015 – Rev 1.1
WL2820D
Typical Application
Pin Description
DFN1X1-4L
PIN
1
2
3
4
EP
Symbol
VOUT
GND
EN
VIN
Description
Output
Ground
Enable (Active high)
Input
GND level, this pin must
connect to GND.
Block Diagram
Will Semiconductor Ltd.
2
Jun, 2015 – Rev 1.1
WL2820D
Absolute Maximum Ratings
Parameter
Power Dissipation, P
D
@T
A
=25℃
V
IN
Range
V
EN
Range
V
OUT
Range
I
OUT
Lead Temperature Range
Storage Temperature Range
Operating Junction Temperature Range
ESD Ratings
HBM
MM
Value
400
-0.3½6.5
-0.3½V
IN
-0.3½V
IN
400
260
-55 ~ 150
150
8000
400
Unit
mW
V
V
V
mA
o
C
C
C
o
o
V
V
Recommend Operating Ratings
Parameter
Operating Supply voltage
Operating Temperature Range
Thermal Resistance, R
θJA
Value
2.2½5.5
-40½85
250
o
Unit
V
o
C
C/W
Will Semiconductor Ltd.
3
Jun, 2015 – Rev 1.1
WL2820D
Electronics Characteristics
(Ta=25
o
C, V
IN
=V
OUT
+1V, C
IN
=C
OUT
=1uF, unless otherwise noted)
Parameter
Symbol
Condition
V
OUT
≤
1.5V, V
IN
=2.7V, I
OUT
=1mA
Output Voltage
V
OUT
V
OUT
>1.5V,
I
OUT
=1mA
Current Limit
I
LIM
V
EN
=V
IN
V
OUT
=3.3V, I
OUT
=300mA
V
OUT
=3.0V, I
OUT
=300mA
Dropout Voltage
V
DROP
V
OUT
=2.8V, I
OUT
=300mA
V
OUT
=2.5V, I
OUT
=300mA
V
OUT
=1.8V, I
OUT
=300mA
V
OUT
≤1.5V,
I
OUT
=300mA
Line Regulation
Load Regulation
Quiescent Current
Short Current
Shut-down Current
△V
LINE
△V
Load
I
Q
I
SHORT
I
SHDN
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
Thermal shutdown threshold
Thermal shutdown hysteresis
Auto-discharge Nch Tr.
ON Resistance
V
ENH
V
ENL
I
EN
e
NO
T
SD
△
T
SD
R
LOW
V
IN
=4.0V，V
CE
=0V
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
=1μF
55
165
30
100
1.2
0.4
1.0
70
dB
60
V
V
Min.
0.97
V
OUT
0.98
V
OUT
300
Typ.
V
OUT
V
OUT
Max.
1.03
V
OUT
1.02
V
OUT
Unit
V
mA
220
240
250
280
400
Vin-min=2.2V
0.01
10
42
80
1.0
0.1
30
70
%/V
mV
330
360
375
420
600
mV
μA
mA
μA
μA
μV
RMS
o
o
C
C
Ω
Will Semiconductor Ltd.
4
Jun, 2015 – Rev 1.1
WL2820D
Typical characteristics
(Ta=25
o
C, V
IN
=3.8V, V
OUT
= 2.8V C
IN
=C
OUT
=1uF, unless otherwise noted)
Quiescent current vs. Supply voltage
Quiescent current vs. Supply voltage
Output voltage vs. Supply voltage
Output voltage vs. Supply voltage
Output voltage vs. Output current
Output voltage vs. Output current
Will Semiconductor Ltd.
5
Jun, 2015 – Rev 1.1
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