AAT2856
High Current Charge Pump with
Dual LDO for BacklightApplications
Typical Characteristics
LDOs A and B Line Regulation
Output Voltage Error (%)
1.0
1.5
LDOs A and B Output Voltage
vs. Temperature
Output Voltage (%)
1
0.5
0
-0.5
-1
-1.5
-40
0.5
OUTA
0
OUTB
-0.5
-1.0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
-15
10
35
60
85
Input Voltage (V)
Temperature (°C)
LDOs A and B Dropout Characteristics
3.2
LDOs A and B Line Transient Response
(10mA Load)
V
IN
= 3.6V
V
IN
(250mV/div)
Output Voltage (V)
3.0
2.8
2.6
2.4
2.2
2.0
2.7
I
OUT
= 100mA
I
OUT
= 200mA
V
IN
= 3.1V
V
OUT
(AC Coupled)
(20mV/div)
2.8
2.9
3.0
3.1
3.2
Input Voltage (V)
Time (50µs/div)
LDOs A and B Load Transient Response
(10mA to 200mA Load Step)
I
OUT
= 200mA
I
OUT
(100mA/div)
V
OUT
(AC Coupled)
(100mV/div)
Time (50µs/div)
2856.2007.06.1.0
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
