PRODUCT DATASHEET
AAT2861
ChargePump
TM
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Typical Characteristics
Turn On to 2X Mode Flash
(V
IN
= 2.8V; 300mA/ch)
4
Turn On to 1X Mode Backlight
(V
IN
= 3.6V; 20mA/ch)
V
EN/SET
(2V/div)
0V
V
FL_EN
(2V/div)
V
OUT
(2V/div)
V
FLX
(2V/div)
I
IN
(200mA/div)
Time (50µs/div)
4
2
0
2
0
V
OUT
(2V/div)
600
400
200
0
V
SINK
(2V/div)
0V
I
IN
(100mA/div)
0A
Time (200µs/div)
Turn On to 1.5X Mode Backlight
(V
IN
= 3.2V; 20mA/ch)
V
EN/SET
(2V/div)
0V
Turn On to 2X Mode Backlight
(V
IN
= 3.0V; 20mA/ch)
V
EN/SET
(2V/div)
0V
V
OUT
(2V/div)
V
SINK
(2V/div)
I
IN
(200mA/div)
0V
V
OUT
(2V/div)
V
SINK
(2V/div)
I
IN
(200mA/div)
Time (200µs/div)
0V
0A
0A
Time (200µs/div)
Turn Off from 1.5X Mode Backlight
(V
IN
= 3.2V; 20mA/ch)
Input Voltage
(AC coupled)
(top) (mV)
Operating Characteristic
(V
IN
= 3.2V;
20mA/ch Backlight; 1.5x Mode; C
OUT
= 2.2µF)
Charge Pump
Output Voltage
(AC coupled) (bottom) (mV)
20
10
0
V
EN/SET
(2V/div)
V
DIODE
(2V/div)
I
IN
(200mA/div)
50
0
-50
Time (200µs/div)
Time (500ns/div)
2861.2009.02.1.2
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7
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
