PRODUCT DATASHEET
AAT2861
TM
ChargePump
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Typical Characteristics
Turn On to 2X Mode Flash
Turn On to 1X Mode Backlight
(VIN = 2.8V; 300mA/ch)
(VIN = 3.6V; 20mA/ch)
4
2
VEN/SET
VFL_EN
(2V/div)
(2V/div)
0V
0
VOUT
(2V/div)
VSINK
(2V/div)
4
2
0
VOUT
(2V/div)
VFLX
0V
0A
600
400
200
0
(2V/div)
IIN
IIN
(200mA/div)
(100mA/div)
Time (50µs/div)
Time (200µs/div)
Turn On to 1.5X Mode Backlight
Turn On to 2X Mode Backlight
(VIN = 3.2V; 20mA/ch)
(VIN = 3.0V; 20mA/ch)
VEN/SET
(2V/div)
VEN/SET
(2V/div)
0V
0V
VOUT
VOUT
(2V/div)
VSINK
(2V/div)
VSINK
(2V/div)
0V
0A
0V
0A
(2V/div)
IIN
IIN
(200mA/div)
(200mA/div)
Time (200µs/div)
Time (200µs/div)
Turn Off from 1.5X Mode Backlight
Operating Characteristic
(VIN = 3.2V; 20mA/ch)
(VIN = 3.2V; 20mA/ch Backlight; 1.5x Mode; COUT = 2.2µF)
20
10
0
VEN/SET
(2V/div)
VDIODE
(2V/div)
50
0
IIN
-50
(200mA/div)
Time (500ns/div)
Time (200µs/div)
w w w . a n a l o g i c t e c h . c o m
2861.2009.02.1.2
7
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
