AAT3142
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
Typical Characteristics
V
IN
= 3.5V, C
IN
= C
CP
= C
1
= C
2
= 1µF, T
A
= 25°C, unless otherwise noted.
Input Current vs. Input Voltage
(3x10mA)
70
60
50
200
Input Current vs. Input Voltage
(3x30mA)
180
160
140
V
DIODE
= 3.4V
V
DIODE
= 3.4V
I
IN
(mA)
40
30
20
10
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
I
IN
(mA)
120
100
80
60
V
DIODE
= 3.0V
40
20
0
2.7
V
DIODE
= 3.0V
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
Diode Current vs. Input Voltage
(30mA, 15mA Settings)
40
35
0.850
0.825
V
IH
and V
IL
vs. V
IN
V
DIODE
= 3.4V
I
DIODE
(mA)
30
25
20
15
10
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
0.800
0.775
0.750
0.725
0.700
V
IH
V
IL
V
DIODE
= 3.4V
0.675
0.650
0.625
0.600
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Input Voltage (V)
3142.2007.03.1.2
9
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
