AAT2847
Four-Channel Backlight Driver with Dual LDOs
Typical Characteristics
LDOA/LDOB Quiescent Current vs. Input Voltage
(V
OUT
= 1.2V)
120
LDOA Load Transient Response
(V
IN
= 3.6V; V
LDOA
= 1.2V)
200mA
Quiescent Current (µA)
100
80
60
40
20
0
2.7
85°C
25°C
I
LDOA
(100mA/div)
10mA
-40°C
V
LDOA
(100mV/div)
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Time (20µs/div)
LDOB Load Transient Response
(V
IN
= 3.6V; V
LDOB
= 1.2V)
200mA
LDOA Line Transient Response
(10mA Load)
V
IN
= 4.2V
I
LDOB
(100mA/div)
10mA
V
IN
(400mV/div)
V
IN
= 3.6V
V
LDOB
(100mV/div)
V
LDOA
(20mV/div)
Time (20µs/div)
Time (40µs/div)
LDOB Line Transient Response
(10mA Load)
V
IN
= 4.2V
V
IN
(400mV/div)
V
IN
= 3.6V
V
LDOB
(20mV/div)
Time (40µs/div)
2847.2007.09.1.0
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
