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WL2805N
Low power consumptionˈCMOS LDO
Descriptions
The WL2805N 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.
The WL2805N 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 WL2805N regulators are available in
SOT-23-3L packages. Standard products are Pb-free
and Halogen free products.
Features
z Quiescent current : 3A Typ.
z Input voltage : 2.2V ~ 5.5V
z Output voltage : 1.2V ~ 3.3V
z Output current : 250mA @ V
z Output current : 100mA @ V
z Dropout voltage : 100mV @ 100mA
z Recommend capacitor : 1uF
z Operating Temperature : -40 ~ +85 °C
z Output short protection
Applications
z MP3/MP4 Players
z Cell phones
z Bluetooth earphone
z Wireless mouse
z Others electronics devices
OUT
OUT
>2V
2V
WL2805N
Http://www.willsemi.com
SOT-23-3L
VIN
3
1
2
GND VOUT
Pin Configuration (Top View)
For detail marking information please see page 8.
Order Information
For detail order information please see page 8.
****
Marking
Will Semiconductor Ltd. 1 Jun. 2011 – Rev1.4
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WL2805N
Typical Applications
VIN
1uF
3
Block Diagram
VIN
Vref
2
1
1uF
VOUT
OCP
GND
Pin Descriptions
PIN Symbol Description
1 GND Ground
2 VOUT Output
3 VIN Input
VOUT
Will Semiconductor Ltd. 2 Jun. 2011 – Rev1.4
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WL2805N
Absolute Maximum Ratings
Parameter Value Unit
Power Dissipation 300 mW
VIN Range
VEN Range
V
Range
OUT
Lead Temperature 260
Storage Temperature -65 ~ 150
Operating Junction Temperature 150
Operating Range
Parameter Value Unit
Thermal Resistance, R
417
JA
Input Voltage 2.2 ~ 5.5 V
Operating Temperature Range
Electronics Characteristics
Parameter Symbol Condition Min. Typ. Max. Unit
Output Voltage V
Output Current I
Output short current limiter I
Dropout Voltage V
Line Regulation
Load Regulation
Quiescent Current IQ V
Power Supply Ripple Rejection PSRR
(VIN = V
OUT
OUT
V
LIM
DROP
ƸV
LINE
ƸV
LOAD
OUT
V
= V
IN
V
OUT
V
OUT
OUT
I
OUT
I
OUT
V
IN=VOUT
I
OUT
= V
IN
Vp-p=1V, F=100Hz, I
Vp-p=1V, F=1KHz, I
+1V, CIN=C
=1uF, TA=25°C, unless otherwise noted)
OUT
1.170 1.200 1.230
1.270 1.300 1.330
1.470 1.500 1.530
1.764 1.800 1.836
OUT
+1V , I
OUT
=1mA
2.450 2.500 2.550
2.744 2.800 2.856
2.940 3.000 3.060
3.234 3.300 3.366
> 2V 250
2V
100
=GND 150 mA
=30mA, V
=100mA, V
+1V~6V, I
=3.0V 30 100
OUT
=3.0V 100 200
OUT
=40mA 0.1 %/V
OUT
= 1~ 100mA 25 mV
OUT
+1V, I
=0A 3 5
OUT
=10mA -50
OUT
=10mA -30
OUT
-0.36.0
-0.3V
-0.3V
IN
IN
-4085
V
V
V
o
C
o
C
o
C
o
C/W
o
C
V
mA
mV
uA
dB
dB
Will Semiconductor Ltd. 3 Jun. 2011 – Rev1.4
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WL2805N
Typical Characteristics (T
15
12
V
=3.0V
OUT
=25oC, unless otherwise noted)
A
9
6
3
Quiescent Current (uA)
0
0123456
Input Voltage (V)
Quiescent Current vs. Input Voltage
5
V
=3.0V
OUT
4
3
2
Output Voltage (V)
1
I
=100mA
0
0123456
Input Voltage (V)
OUT
Output Voltage vs. Input Voltage
300
250
V
=3.0V
OUT
200
150
100
Dropout Voltage (V)
50
0
0 50 100 150 200 250 300
Output Current (mA)
Dropout Voltage vs. Output Current
Quiescent Current (uA)
Output Voltage (V)
300
250
200
150
100
Dropout Voltage (V)
15
12
V
=3.3V
OUT
9
6
3
0
0123456
Input Voltage (V)
Quiescent Current vs. Input Voltage
5
V
=3.3V
OUT
4
3
2
1
I
=100mA
0
0123456
Input Voltage (V)
OUT
Output Voltage vs. Input Voltage
V
=3.3V
OUT
50
0
0 50 100 150 200 250 300
Output Current (mA)
Dropout Voltage vs. Output Current
Will Semiconductor Ltd. 4 Jun. 2011 – Rev1.4
Page 5
3.5
3.0
2.5
2.0
1.5
1.0
Output Voltage (V)
0.5
0.0
0 100 200 300 400 500 600 700
85OC
25OC
-40OC
Output Current (mA)
V
OUT
Output Short Protection
3.02
3.01
3.00
2.99
V
=3.0V
OUT
IO=1mA
2.98
2.97
Output Voltage (V)
2.96
2.95
-50 -25 0 25 50 75 100 125
IO=40mA
Temperature (oC)
IO=100mA
Output Voltage vs. Temperature
80
70
60
50
40
30
PSRR (dB)
20
10
0
10 100 1000 10000
Frequency (Hz)
VIN =4.0V
V
V
I
OUT
IN_Ripple
=3.0V
OUT
=1mA
PSRR vs. Frequency
=3.0V
=1Vp-p
3.5
3.0
2.5
2.0
1.5
1.0
Output Voltage (V)
0.5
0.0
0 100 200 300 400 500 600 700
3.33
3.32
3.31
3.30
3.29
3.28
3.27
Output Voltage (V)
3.26
3.25
-50 -25 0 25 50 75 100 125
80
70
60
50
40
30
PSRR (dB)
20
10
0
10 100 1000 10000
85OC
25OC
-40OC
WL2805N
V
=3.3V
OUT
Output Current (mA)
Output Short Protection
V
=3.3V
OUT
IO=1mA
IO=100mA
IO=40mA
Temperature (oC)
Output Voltage vs. Temperature
VIN =4.3V
=1Vp-p
V
IN-Ripple
V
=3.3V
OUT
I
=1mA
OUT
Frequency (Hz)
PSRR vs. Frequency
Will Semiconductor Ltd. 5 Jun. 2011 – Rev1.4
Page 6
80
70
60
50
40
VIN =4.0V
V
V
I
OUT
=1Vp-p
IN_Ripple
=3.0V
OUT
=10mA
30
PSRR (dB)
20
10
0
10 100 1000 10000
Frequency (Hz)
PSRR vs. Frequency
Power Up
Line Regulation
80
70
60
50
40
VIN =4.3V
V
V
I
OUT
IN_Ripple
=3.3V
OUT
=10mA
30
PSRR (dB)
20
10
0
10 100 1000 10000
Frequency (Hz)
PSRR vs. Frequency
Power Down
Load Regulation
WL2805N
=1Vp-p
Will Semiconductor Ltd. 6 Jun. 2011 – Rev1.4
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Package outline dimensions
WL2805N
SOT-23-3L
Symbol
A 1.050 1.250
A1 0.000 0.100
A2 1.050 1.150
b 0.300 0.500
c 0.100 0.200
D 2.820 3.020
E 1.500 1.700
E1 2.650 2.950
e 0.950(Basic)
e1 1.800 2.000
L 0.300 0.600
Will Semiconductor Ltd. 7 Jun. 2011 – Rev1.4
Dimensions In Millimeters
Min. Max.
0o 8
o
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Order Information
WL2805N
Ordering No.
WL2805N12-3/TR 1.2 SOT-23-3L -40~+85°C F12*
WL2805N13-3/TR 1.3 SOT-23-3L -40~+85°C F13*
WL2805N15-3/TR 1.5 SOT-23-3L -40~+85°C F15*
WL2805N18-3/TR 1.8 SOT-23-3L -40~+85°C F18*
WL2805N25-3/TR 2.5 SOT-23-3L -40~+85°C F25*
WL2805N28-3/TR 2.8 SOT-23-3L -40~+85°C F28*
WL2805N30-3/TR 3.0 SOT-23-3L -40~+85°C F30*
WL2805N33-3/TR 3.3 SOT-23-3L -40~+85°C F33*
Remark:
1. Marking:
F = Device code
12 = Voltage code
* = Month code (A~Z)
Vout
(V)
Package
Operating
Temperature
Marking Shipping
Tape and Reel,
3000
Tape and Reel,
3000
Tape and Reel,
3000
Tape and Reel,
3000
Tape and Reel,
3000
Tape and Reel,
3000
Tape and Reel,
3000
Tape and Reel,
3000
Will Semiconductor Ltd. 8 Jun. 2011 – Rev1.4
Page 9
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