PRODUCT DATASHEET
AAT3105178
ChargePump
TM
Typical Characteristics
V
IN
= 3.6V, C
IN
= C
OUT
= C
P
= 1μF; T
A
= 25°C, unless otherwise noted.
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver
Shutdown Current vs. Temperature
0.10
7.0
Quiescent Current vs. Input Voltage
(1x Mode)
Quiescent Current (mA)
6.0
5.0
4.0
3.0
2.0
1.0
ShutdownnCurrent (µA)
0.08
V
IN
= 5.5V
V
IN
= 2.7V
0.06
0.04
0.02
85°C
25°C
-40°C
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
0.00
-40
-15
10
35
60
85
Temperature (°C)
Supply Voltage (V)
No Load Operating Current vs. Input Voltage
(2x Mode)
6.4
900
Frequency vs. Temperature
Operating Current (mA)
6.2
6.0
5.8
5.6
5.4
5.2
2.7
Frequency (KHz)
5.5
85°C
25°C
-40°C
880
860
840
820
3.1
3.5
3.9
4.3
4.7
5.1
800
-40
-20
0
20
40
60
80
Supply Voltage (V)
Temperature (°C)
Current Matching vs. Temperature
LED Current per Channel (mA)
Current per Channel (mA)
33
32
31
30
29
28
27
-40
1.2%
1.0%
0.8%
0.6%
LED Current Control vs. PWM Duty Ratio
(F
PWM
= 25KHz)
30
24
18
D1
D2
D3
D4
Matching
-15
10
35
60
12
0.4%
0.2%
0.0%
85
6
0
10
20
30
40
50
60
70
80
90
100
Temperature (°C)
Duty Ratio (%)
3105.2008.10.1.0
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