PRODUCT DATASHEET
AAT2860
ChargePump
TM
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Typical Characteristics
Operating Characteristic
LDO Output Voltage Deviation (%)
(30mA/Channel
Backlight; 2x Mode; V
IN
= 3.2V;
C
OUT
= 2.2µF)
Charge Pump
V
OUT
(AC coupled) (bottom) (mV)
V
IN
(AC coupled) (top) (mV)
20
10
0
20
10
0
-10
-20
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
0.1
1
10
100
1000
LDOs A/B/C Load Regulation
(V
IN
= 3.6V)
V
LDO
= 3.0V
V
LDO
= 1.5V
Time (500ns/div)
Load Current (mA)
LDO Output Voltage vs Temperature
LDO Output Voltage Deviation (%)
LDO Output Voltage Deviation (%)
(V
IN
= 3.6V; I
LDO
= 0mA)
1.5
1
0.5
0
-0.5
-1
-1.5
-40
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
2.7
LDOs A/B/C Line Regulation
(I
LDO
= 10mA)
V
LDO
= 3.0V
V
LDO
= 1.5V
V
LDO
= 3.0V
V
LDO
= 1.5V
-15
10
35
60
85
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Temperature (°C)
Input Voltage (V)
LDOs A/B/C Load Transient Response
(I
LDO
= 10mA to 200mA;
V
IN
= 3.6V;
V
LDO
= 1.8V;
C
LDO
= 2.2µF)
200
LDOs A/B/C Line Transient Response
(V
IN
= 3.6V to 4.2V;
I
LDO
= 10mA;
V
LDO
= 1.8V;
C
LDO
= 2.2µF)
4.4
V
LDO
(bottom) (V)
V
LDO
(bottom) (V)
I
LDO
(top) (mA)
100
0
2.00
1.90
1.80
1.70
1.60
4.0
V
IN
(top) (V)
3.6
1.82
1.81
1.80
1.79
1.78
Time (20µs/div)
Time (1ms/div)
2860.2008.05.1.0
www.analogictech.com
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
