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.
Efficiency vs. Input Voltage
(Code 26)
100
90
100
90
Efficiency vs. Input Voltage
(D1 = 3.5V, D2 = 3.3V, D3 = 3.2V)
Code 26
Efficiency (%)
80
70
60
50
40
30
2.9
3.0V
F
Efficiency (%)
80
70
60
50
40
30
2.9
3.5V
F
Code 28
Code 32
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
Input Voltage (V)
Input Voltage (V)
Efficiency vs. Input Voltage
(D1-D2 = 3.5V, D3 = 3.2V)
100
90
Code 26
Efficiency (%)
80
70
60
50
40
Code 32
Code 28
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
30
2.9
Input Voltage (V)
3142.2007.03.1.2
5