Four-Channel Backlight Driver with Dual LDOs
Typical Characteristics
C
IN
= C
O1
= C
O2
= 2.2µF, C
1
= C
2
= 1.0µF, C
BP
= 0.1µF; T
A
= 25°C, unless otherwise noted. Typical values are
at T
A
= 25°C and V
IN
= 3.6V.
AAT2845
LDOA Line Transient Response
(10mA Load)
LDOB Line Transient Response
(10mA Load)
V
IN
(400mV/div)
V
IN
= 4.2V
V
IN
= 3.7V
V
OUT
(10mV/div)
V
IN
(400mV/div)
V
IN
= 4.2V
V
IN
= 3.7V
V
OUT
(10mV/div)
Time (40µs/div)
Time (40µs/div)
LDOA Load Transient Response
LDOB Load Transient Response
I
OUT
(100mA/div)
I
OUT
(100mA/div)
V
OUT
(100mV/div)
V
OUT
(100mV/div)
Time (20µs/div)
Time (20µs/div)
2845.2006.12.1.0
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