AAT3134
High Efficiency 1X/1.5X Fractional
Charge Pump for White LED Applications
Typical Characteristics
Unless otherwise noted, VIN = 3.5V, CIN = COUT = C1 = C2 = 1µF, TA = 25°C.
Efficiency vs. Input Voltage
IDIODE vs. Input Voltage
(4x20mA)
(4x20mA)
100
95
90
85
80
75
70
65
60
55
50
90
85
80
75
70
65
60
55
50
45
40
VDIODE = 3.3V VDIODE = 3.4V VDIODE = 3.5V
VDIODE = 3.6V
VDIODE = 3.3V
VDIODE = 3.4V
VDIODE = 3.5V
VDIODE = 3.6V
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1
Input Voltage (V)
Input Voltage (V)
Quiescent Current vs. Input Voltage
VIH and VIL vs. VIN
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.850
0.825
0.800
0.775
0.750
0.725
0.700
0.675
0.650
0.625
0.600
VIH
VDIODE = 3.3V
VDIODE = 3.4V
VDIODE = 3.5V
VDIODE = 3.6V
VIL
2.50
3.00
3.50
4.00
4.50
5.00
5.50
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Input Voltage (V)
3134.2005.12.1.1
5
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