AAT3131 Datasheet, PDF (5/14 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications

AAT3131
High Efficiency 1X/1.5X Fractional
Charge Pump for White LED Applications
Typical Characteristics
Unless otherwise noted, V_IN = 3.5V, C_IN = C_OUT = C₁ = C₂ = 1µF, T_A = 25°C.
Efficiency vs. Input Voltage
(4x20mA)
100
95
90
V_DIODE = 3.3V
85
V_DIODE = 3.4V
80
75
70
V_DIODE = 3.5V
65
V_DIODE = 3.6V
60
55
50
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)
I_DIODE vs. Input Voltage
(4x20mA)
90
V_DIODE = 3.3V V_DIODE = 3.4V V_DIODE = 3.5V
85
V_DIODE = 3.6V
80
75
70
65
60
55
50
45
40
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)
Quiescent Current vs. Input Voltage
V_IH and V_IL vs. V_IN
2.4
0.850
2.2
2.0
1.8
1.6
1.4
1.2
V_DIODE = 3.3V
1.0
V_DIODE = 3.4V
0.825
0.800
0.775
0.750
0.725
0.700
V_IH
V_IL
0.8
V_DIODE = 3.5V
0.6
0.4
V_DIODE = 3.6V
0.2
0.675
0.650
0.625
0.0
0.600
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)
V_IN (V)
3131.2005.12.1.2
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