AAT3122 Datasheet, PDF (5/12 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications

AAT3122
High Efficiency 1X/1.5X Fractional Charge
Pump for White LED Applications
Typical Characteristics
Unless otherwise noted, V_IN = 3.6V, C_IN = C_OUT = C₁ = C₂ = 1µF, T_A = 25°C.
Efficiency vs. V_IN
(I_D = 80mA)
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
V_IN (V)
I_DIODE vs. V_IN
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
V_IN (V)
Quiescent Current vs. V_IN
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
2.50
V_DIODE = 3.3V
V_DIODE = 3.4V
V_DIODE = 3.5V
V_DIODE = 3.6V
3.00
3.50
4.00
V_IN (V)
4.50
5.00
5.50
V_IH and V_IL vs. V_IN
0.850
0.825
0.800
0.775
V_IH
0.750
0.725
0.700
V_IL
0.675
0.650
0.625
0.600
2.5
3.0
3.5
4.0
4.5
5.0
5.5
V_IN (V)
3122.2005.11.1.3
5