DATA SHEET
AAT2822/2823/2824/2825
TFT-LCD DC/DC Converter with WLED Driver and VCOM Buffer
Electrical Characteristics
VIN = 5V, EN = WEN = WDIM = VIN, VAVDD = VDD = 12V, TA = -40°C to 85°C unless otherwise noted. Typical values are
at TA = 25°C.
Symbol Description
Power Supply
Conditions
Min
Typ
Max
Units
VIN
VUVLO
UVLOHYS
IIN
Input Voltage Range
Under-Voltage Lockout Threshold Rising Edge
UVLO Hysteresis
IN Quiescent Current
Shutdown Current
REF Output Voltage
REF Load Regulation
REF Current
2.5
5.5
2.5
V
V
mV
mA
µA
V
2.4
50
1.1
VFB = VFBP = 0.7V, VFBN = -0.1, LX not switching
EN = WEN = Low, ISHDN = IIN + IDD, VDD = 5V
No load
0 < ILOAD < 50µA
In regulation
Temperature rising
Hysteresis
1.6
1
1.218
10
ISHDN
1.182
50
1.20
VREF
mV
µA
+140
15
TSD
Thermal Shutdown
OC
Main Step-Up Regulator
VIN
-
VAVDD
Output Voltage Range
14.5
V
VDIODE
910
86
FOSC
DCMAX
Operating Frequency
Maximum Duty Cycle
1300
90
1690
kHz
%
VFB
FB Regulation Voltage
No Load
0.588
0.6
0.612
V
FB Fault Trip Level
FB Load Regulation
FB Line Regulation
FB Input Bias Current
LX On-Resistance
LX Leakage Current
LX Current Limit
VFB falling
0.535 0.546 0.557
0.01
V
%/mA
%/V
µA
mΩ
µA
0 < IAVDD < full load
VIN = 2.5V to 5.5V
VFB = 0.7V
ILX = 200mA
VLX = 13.2V
0.1
±0.4
+1
-1
1
RLX(ON)
ILX
ILIM
350
0.01
700
20
VFB = 0.7V, duty cycle = 75%
A
tSS
Soft-Start Period
1.3
ms
Gate High Charge Pump (VGH)
VDD
VFBP
IFBP
VDD Input Supply Range
Operating Frequency
FBP Regulation Voltage
FBP Fault Trip Level
2.7
13.2
V
kHz
V
mV
μA
Ω
FOSC
0.6
0.588
470
-1
0.612
530
+1
6
VFBP Falling
VFBP = 0.7V
FBP Input Bias Current
DRVPPRDS DRVP PCH ON-Resistance
DRVPNRDS DRVP NCH On-Resistance
Gate Low Charge Pump (VGL)
3
1.5
VFBP = 0.585V
VFBP = 0.615V
3
Ω
kΩ
20
VDD
VFBN
IFBN
VDD Input Supply Range
Operating Frequency
FBN Regulation Voltage
FBN Fault Trip Level
2.7
13.2
V
Hz
mV
mV
μA
Ω
FOSC
0
425
-50
408
-1
+50
442
+1
6
VFBN Rising
VFBN = -0.1V
FBN Input Bias Current
DRVNPRDS DRVN PCH ON-Resistance
3
VFBN = 0.035V
VFBN = -0.025V
1.5
3
Ω
kΩ
DRVNNRDS DRVN NCH On-Resistance
20
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
6
202081B
• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 2, 2012
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
