DATA SHEET
AAT2822/2823/2824/2825
TFT-LCD DC/DC Converter with WLED Driver and VCOM Buffer
Typical Characteristics
Oscillator Frequency vs. Temperature
Oscillator Frequency (mHz)
1.285
1.280
1.275
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
-40
-15
10
35
60
85
(VAVDD→VGH→VGL; V
IN
= 5.0V)
Power Up Sequencing
EN/SET
(5V/div)
V
AVDD
(5V/div)
V
GH
(20V/div)
V
GL
(20V/div)
Time (500µs/div)
Temperature (°C)
(VAVDD->VGL->VGH; V
IN
= 5.0V)
100
Power Up Sequencing
Main Boost Efficiency
(V
OUT
= 12V)
90
80
Efficiency (%)
EN/SET
(2V/div)
V
AVDD
(2V/div)
V
GH
(10V/div)
V
GL
(10V/div)
70
60
50
40
30
20
10
0
0
50
100
150
200
250
300
350
400
450
500
Time (1ms/div)
Output Current (mA)
Main Boost Load Transient
(V
IN
= 5.0V)
12.25
12.20
Line Regulation
Output Voltage (V)
12.15
12.10
12.05
12.00
11.95
11.90
11.85
11.80
11.75
2.7
3.2
3.7
4.2
4.7
V
OUT
(100mV/div)
I
OUT
(50mA/div)
100mA
10mA
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 100mA
5.2
Time (500µs/div)
Input Voltage (V)
8
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
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
