DATA SHEET
AAT2822/2823/2824/2825
TFT-LCD DC/DC Converter with WLED Driver and VCOM Buffer
Electrical Characteristics
V
IN
= 5V, EN = WEN = WDIM = V
IN
, V
AVDD
= V
DD
= 12V, T
A
= -40
o
C to 85
o
C unless otherwise noted. Typical values are
at T
A
= 25
o
C.
Symbol
V
LED
I
OUT
≥V
FB
/
≥V
IN
R
DS(ON)
V
WFB
T
SS
Description
Output Voltage
Maximum Continuous Output Current
Line Regulation
Low Side Switch On-Resistance
WFB Pin Regulation
Soft-Start Time
Conditions
Min
V
IN
-
V
DIODE
Typ
Max
28
Units
V
mA
%/V
WLED Driver (AAT2822, AAT2823 Only)
V
LED
= 28V
V
IN
= 2.5V to 5.5V
0.282
From Enable to Output Regulation;
V
FB
= 300mV
V
LED
Rising
V
LED
Falling
50
0.7
300
0.3
300
0.55
1.3
1
5
4.5
1.5
13.2
2.5
12
V
SUP
0.60
25
0.65
0.318
mΩ
V
µs
V
mV
A
kHz
%
V
mA
mV
V
mV
V
OVP
Over-Voltage Protection Threshold
OV
HYS
Over-Voltage Hysteresis
I
LIMIT
N-Channel Current Limit
F
PWM
Maximum W
DIM
PWM Frequency
DC
MIN
Minimum Duty Cycle
VCOM Buffer (AAT2822 , AAT2824 Only)
V
OPIN
Supply Range
I
OPIN
Supply Current
V
OS
Input Offset Voltage
V
CM
Input Common-Mode Range
V
OH
V
OL
I
SC
GBW
SR
Logic
WDIM/
WEN
L
/EN
L
WDIM/
WEN
H
/EN
H
I
EN
Output Voltage Swing, High
Output Voltage Swing, Low
Short-Circuit Current
Gain Bandwidth Product
Slew Rate
Enable Input Low Voltage
Enable Input High Voltage
WDIM/WEN/EN Input Current
(V
NEG
, V
POS
, V
OUT
)
≡
V
SUP
/2
0
I
OUT
= 5mA
I
OUT
= -5mA
V
SUP
/2
Source
Sink
75
75
12
13
V
IN
= 2.5V
V
IN
= 5.5V
1.4
V
SUP
-
150
150
mV
mA
MHz
V/µs
0.4
V
V
1
µA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202081B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 2, 2012
7
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
