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WL2803K Schematic ( PDF Datasheet ) - WillSEMI

Teilenummer WL2803K
Beschreibung CMOS LDO
Hersteller WillSEMI
Logo WillSEMI Logo 




Gesamt 9 Seiten
WL2803K Datasheet, Funktion
WL2803K
Ultra low dropout, 800mA, CMOS LDO
WL2803K
Http://www.sh-willsemi.com
Descriptions
The WL2803K series are ultra low dropout, Low
quiescent current, high PSRR CMOS LDO. The
dropout voltage is 260mV (Typ.) at 800mA load
current.
Using CMOS construction, the quiescent current
consumed by the WL2803K is typically 150uA over the
entire input voltage range, making it attractive for
consumer, networking applications that demand high
output current.
The WL2803K series are available in wide output
voltage range version from 1.2V to 3.3V with 0.1V step.
Standard output voltages are 1.8V, 3.3V. Other output
voltage options are available upon request.
The WL2803K series offer thermal shutdown
(OTP) and current limit functions, to assure the stability
of chip and power system at wrong condition, and it
uses trimming technique to guarantee output voltage
accuracy within ±2%.
The WL2803K regulators are available in
SOT-89-5L packages. Standard products are Pb-free
and Halogen-free.
SOT-89-5L
VOUT
5
NC
4
12
VIN GND
3
EN
Pin Configuration (Top View)
54
2803K**
YYWW
Features
Input voltage
: 2.5V~5.5V
Output voltage : 1.8V, 3.3V (Or upon request)
Output current : 800mA
PSRR
: 65dB @ 1KHz
Dropout voltage : 260mV @ IOUT=0.8A
Output noise
: 100uV
Quiescent current : 150μA Typ.
Applications
123
2803K = Device code
** = Voltage code (33: 3.3V)
YY = Year code
WW = Week code
Marking
Order Information
For detail information, Please refer to page 9.
LCD TV
STB
Computer, Graphic card
Network communication equipments
Others portable electronics devices
Will Semiconductor Ltd.
1 Aug. 2013 Rev1.4






WL2803K Datasheet, Funktion
WL2803K
3.8
3.7
T =85oC
A
3.6
3.5
3.4
V =5.5V
IN
V =4.2V
IN
3.3
3.2 V =3.8V
IN
3.1
3.0
2.9
2.8
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Output Current: I (A)
OUT
Output voltage vs. Output current
100
90
80
70
60
50
40
30
20
10
0
10
V = 4.3V+0.2V
IN P-P
V = 3.3V
OUT
I = 10mA
OUT
100
1000
Ripple Frequency (HZ)
10000
PSRR
300
V =3.3V
OUT
250
T = 85OC
200 A
150
T = 25OC
A
100
50
T = -40OC
A
0
0 200 400 600 800 1000
Output Current: I (mA)
OUT
Dropout voltage vs. Output current
100
90
80
70
60
50
40
30
20
10
0
10
V = 2.8V+0.2V
IN P-P
V = 1.8V
OUT
I = 10mA
O
100
1000
Ripple Frequency (HZ)
10000
PSRR
Startup with EN
Will Semiconductor Ltd.
Shutdown with EN
6 Aug. 2013 Rev1.4

6 Page







SeitenGesamt 9 Seiten
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