PRODUCT DATASHEET
AAT2861
TM
ChargePump
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Typical Characteristics
Operating Characteristic
LDO A/B/C Load Regulation
(VIN = 3.0V; 20mA/ch Backlight; 2X Mode; COUT = 2.2µF)
(VIN = 3.6V)
1.5
1.0
VOUT = 1.8V
VOUT = 3.0V
20
10
0
0.5
20
10
0
0.0
-0.5
-1.0
-1.5
-10
-20
0.1
1
10
100
1000
Time (500ns/div)
Load Current (mA)
LDO A/B/C Output Voltage vs. Temperature
LDO A/B/C Load Transient Response
(VIN = 3.6V; ILDO = 0mA)
(
ILDO
=
10mA to 200mA; VIN = 3.6V; VLDO = 1.8V; CLDO = 2.2µF)
1.5
VOUT = 1.8V
200
100
0
V
OUT = 3.3V
1.0
0.5
-100
-200
-300
-400
-500
2.00
1.90
1.80
1.70
1.60
0.0
-0.5
-1.0
-1.5
-40
-15
10
35
60
85
Temperature (°C)
Time (20µs/div)
LDO A/B/C Line Transient Response
LDO A/B/C Turn On Characteristic
(VIN = 3.6V to 4.2V; ILDO = 10mA; VOUT = 1.8V; CLDO = 2.2µF)
(VLDO = 1.8V; VIN = 3.6V; CLDO = 2.2µF)
4.4
4.0
4.0
2.0
0.0
3.6
1.82
1.81
1.80
1.79
1.78
1.5
1.0
0.5
0.0
Time (1ms/div)
Time (20µs/div)
w w w . a n a l o g i c t e c h . c o m
8
2861.2009.02.1.2
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
