WL2805
WL2805
Low power consumption, CMOS LDO
Descriptions
The WL2805 series are low dropout linear regulators
and optimized to provide a high performance solution
for battery power system to deliver low quiescent
current. The devices offer a new level of cost effective
performance in cellular phones, laptop and notebook
computers, and other portable devices.
VIN
3
Http://www.sh-willsemi.com
SOT-23-3L
SOT-23-5L
VOUT
5
NC
4
The WL2805 series are designed to make use of low
cost ceramic capacitors which ensure the stability of
the output current, and enhance the efficiency in order
to prolong the battery life of those portable devices.
The WL2805 regulators are available in SOT-23-3L
packages. Standard products are Pb-free and Halogen
free products.
Pin Configuration (Top View)
1
GND
2
VOUT
1
VIN
2
GND
3
CE
WL2805N**
WL2805E**
Features
3
Quiescent current
Input voltage
Output voltage
Output current
Output current
Dropout voltage
Recommend capacitor
Operating Temperature
Output short protection
: 3μA Typ.
: 2.3V ~ 6.5V
: 1.2V ~ 3.3V
: 250mA @ V
OUT
>2V
: 100mA @ V
OUT
≤2V
: 100mV @ 100mA
: 1uF
: -40 ~ +85
°
C
1
F
5
4
***
2
1
WF
YYWW
**
2
3
For detail marking information please see page 9.
Marking
Applications
MP3/MP4 Players
Cell phones
Bluetooth earphone
Wireless mouse
Others electronics devices
Order Information
For detail order information please see page 9.
Will Semiconductor Ltd.
1
May 2014 – Rev2.3
WL2805
Typical Applications
2
VOUT
Pin Descriptions
PIN
1
2
1
Symbol
GND
VOUT
VIN
Description
Ground
Output
Input
VIN
1uF
3
1uF
3
PIN
VIN
1uF
2
GND
1
VIN
VOUT
5
Symbol
VIN
GND
CE
NC
VOUT
Description
Input
Ground
Chip Enable, Active High
Not connected
Output
VOUT
1
1uF
2
3
3
CE
NC
4
4
5
Block Diagram
VIN
VOUT
VIN
Each Circuit
VOUT
V
REF
CE
CE
0.1uA
V
REF
WL2805N**
WL2805E**
Will Semiconductor Ltd.
2
May 2014 – Rev2.3
WL2805
Absolute Maximum Ratings
Parameter
Power Dissipation
V
IN
V
EN
Range
Range
Value
300
-0.3½7.0
-0.3½V
IN
-0.3½V
IN
260
-65 ~ 150
150
Unit
mW
V
V
V
o
o
o
V
OUT
Range
Lead Temperature
Storage Temperature
Operating Junction Temperature
C
C
C
Operating Range
Parameter
Thermal Resistance, R
θJA
Input Voltage
Operating Temperature Range
Value
417
2.3 ~ 6.5
-40½85
Unit
o
C/W
V
o
C
Electronics Characteristics
(V
IN
= V
OUT
+1V, C
IN
=C
OUT
=1uF, T
A
=25° unless otherwise noted)
C,
Parameter
Symbol
Condition
Min.
1.170
1.270
1.470
Output Voltage
V
OUT
V
IN
= V
OUT
+1V
,
I
OUT
=1mA
1.764
2.450
2.744
2.940
3.234
Output Current
Output short current limiter
Dropout Voltage
Line Regulation
Load Regulation
Quiescent Current
Power Supply Ripple Rejection
I
OUT
I
LIM
V
DROP
△V
LINE
△V
LOAD
I
Q
PSRR
V
OUT
> 2V
V
OUT
≤
2V
V
OUT
=GND
I
OUT
=30mA, V
OUT
=3.0V
I
OUT
=100mA, V
OUT
=3.0V
V
IN
=V
OUT
+1V~6V, I
OUT
=40mA
I
OUT
= 1~ 100mA
V
IN
= V
OUT
+1V, I
OUT
=0A
Vp-p=1V, F=100Hz, I
OUT
=10mA
Vp-p=1V, F=1KHz, I
OUT
=10mA
25
3
-50
-30
5
150
30
100
100
200
0.1
%/V
mV
Typ.
1.200
1.300
1.500
1.800
2.500
2.800
3.000
3.300
Max.
1.230
1.330
1.530
1.836
2.550
2.856
3.060
3.366
250
100
Unit
V
mA
mA
mV
uA
dB
dB
Will Semiconductor Ltd.
3
May 2014 – Rev2.3
WL2805
Typical Characteristics
(T
A
=25
o
C, unless otherwise noted)
15
V
OUT
=3.0V
15
V
OUT
=3.3V
Quiescent Current (uA)
9
Quiescent Current (uA)
0
1
2
3
4
5
6
12
12
9
6
6
3
3
0
0
0
1
2
3
4
5
6
Input Voltage (V)
Quiescent Current vs. Input Voltage
Input Voltage (V)
Quiescent Current vs. Input Voltage
5
V
OUT
=3.0V
4
5
V
OUT
=3.3V
4
Output Voltage (V)
3
Output Voltage (V)
I
OUT
=100mA
3
2
2
1
1
I
OUT
=100mA
0
0
1
2
3
4
5
6
0
0
1
2
3
4
5
6
Input Voltage (V)
Output Voltage vs. Input Voltage
300
V
OUT
=3.0V
250
250
300
Input Voltage (V)
Output Voltage vs. Input Voltage
V
OUT
=3.3V
Dropout Voltage (V)
200
150
100
50
0
Dropout Voltage (V)
0
50
100
150
200
250
300
200
150
100
50
0
Output Current (mA)
Dropout Voltage vs. Output Current
0
50
100
150
200
250
300
Output Current (mA)
Dropout Voltage vs. Output Current
May 2014 – Rev2.3
Will Semiconductor Ltd.
4
WL2805
3.5
3.0
3.5
3.0
85 C
25 C
-40 C
O
O
O
Output Voltage (V)
2.0
1.5
1.0
0.5
0.0
25 C
-40 C
O
O
Output Voltage (V)
2.5
85 C
O
2.5
2.0
1.5
1.0
0.5
V
OUT
=3.0V
0
100
200
300
400
500
600
700
V
OUT
=3.3V
0
100
200
300
400
500
600
700
0.0
Output Current (mA)
Output Short Protection
3.02
3.01
V
OUT
=3.0V
IO=1mA
3.33
3.32
Output Current (mA)
Output Short Protection
V
OUT
=3.3V
IO=1mA
Output Voltage (V)
Output Voltage (V)
3.00
2.99
2.98
IO=100mA
2.97
IO=40mA
2.96
2.95
-50
-25
0
25
50
o
3.31
3.30
3.29
IO=100mA
3.28
IO=40mA
3.27
3.26
75
100
125
3.25
-50
-25
0
25
50
o
75
100
125
Temperature ( C)
Output Voltage vs. Temperature
80
70
60
V
IN
=4.0V
V
IN_Ripple
=1Vp-p
V
OUT
=3.0V
I
OUT
=1mA
80
70
60
Temperature ( C)
Output Voltage vs. Temperature
PSRR (dB)
PSRR (dB)
50
40
30
20
10
0
10
100
50
40
30
20
10
V
IN
=4.3V
V
IN-Ripple
=1Vp-p
V
OUT
=3.3V
I
OUT
=1mA
1000
10000
0
10
100
1000
10000
Frequency (Hz)
PSRR vs. Frequency
Will Semiconductor Ltd.
5
Frequency (Hz)
PSRR vs. Frequency
May 2014 – Rev2.3
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