AAT3141
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
Typical Characteristics
Unless otherwise noted, V
IN
= 3.5V, C
IN
= C
CP
= C
1
= C
2
= 1µF, T
A
= 25°C.
Efficiency vs. Input Voltage
(Code 26)
100
90
100
90
Efficiency vs. Input Voltage
(D1 = 3.5V; D2 = 3.3V; D3 = 3.2V; D4 = 3.0V)
Efficiency (%)
Efficiency (%)
80
70
60
50
40
30
2.9
3.0
3.1
3.0V
F
Code 26
80
70
60
50
40
30
3.5V
F
Code 28
Code 32
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
2.9
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-D4 = 3.2V)
100
90
Code 26
Efficiency (%)
80
70
60
50
40
30
2.9
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
Code 28
Code 32
Input Voltage (V)
3141.2007.03.1.3
5