PRODUCT DATASHEET
AAT3104178
TM
ChargePump
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver
Typical Characteristics
VIN = 3.6V, CIN = COUT = C1 = 1μF; TA = 25°C, unless otherwise noted.
Current Matching vs. Temperature
Efficiency vs. Input Voltage
(AAT3104-2; Code = 1)
(ILED = 31mAx4; Voltage Sweep Upwards)
33.0
32.5
32.0
31.5
31.0
30.5
30.0
29.5
29.0
90
80
70
60
50
40
30
D1
D2
D3
D4
VF = 2.7V
VF = 3.0V
VF = 3.3V
VF = 3.6V
-40
-15
10
35
60
85
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Temperature (°C)
Input Voltage (V)
Efficiency vs. Input Voltage
Quiescent Current vs. Input Voltage
(ILED = 31mAx4; Voltage Sweep Downwards)
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
90
80
70
60
50
40
30
VF = 2.7V
VF = 3.0V
VF = 3.3V
VF = 3.6V
85°C
25°C
-40°C
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
Shutdown Current vs. Temperature
Frequency vs. Temperature
25
20
15
10
5
850
840
830
820
810
800
790
780
770
760
750
VIN = 5.5V
V
IN = 2.7V
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature (°C)
Temperature (°C)
w w w . a n a l o g i c t e c h . c o m
6
3104.2008.09.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
