AAT2845A Datasheet, PDF (8/19 Pages) Advanced Analogic Technologies – Four-Channel Backlight Driver with Dual LDOs

AAT2845A
Four-Channel Backlight Driver with Dual LDOs
Typical Characteristics
C_IN = C_O1 = C_O2 = 2.2µF, C₁ = C₂ = 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.
EN/SET Low Threshold Voltage
vs. Supply Voltage
1
0.9
-40°C
0.8
0.7
0.6
0.5
25°C 85°C
0.4
0.3
0.2
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Supply Voltage (V)
EN/SET High Threshold Voltage
vs. Supply Voltage
1
0.9
-40°C
0.8
0.7
0.6
25°C 85°C
0.5
0.4
0.3
0.2
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Supply Voltage (V)
LDOs A and B Turn-On Characteristic
ENLDO
(2V/div)
V_OUT
(500mV/div)
Time (50µs/div)
LDOs A and B Line Regulation
(10mA Load)
0.4
0.3
0.2
0.1
OUTA
0.0
-0.1
OUTB
-0.2
-0.3
-0.4
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Supply Voltage (V)
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0.1
LDOs A and B Load Regulation
(V_OUT = 1.2V)
OUTA
OUTB
1
10
100
100
Load Current (mA)
LDOs A and B Line Transient Response
(V_OUT = 2.5V; 10mA Load)
V_IN
(400mV/div)
V_OUT
(10mV/div)
V_IN = 3.7V
V_IN = 4.2V
Time (40µs/div)
8
2845A.2007.05.1.0