AAT3155 Datasheet, PDF (5/11 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications

AAT3155
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
Typical Characteristics
C_IN = C_OUT = C₁ = C₂ = 1.0µF; T_A = 25°C, V_IN = 3.6V, unless otherwise noted.
Efficiency vs. Supply Voltage
100
5mA/ch
90
V_F = 3V
80
70
60
50
40
30
2.7 2.9 3.1
500µA/ch
V_F = 2.7V
3.3 3.5 3.7 3.9
Supply Voltage (V)
20mA/ch
V_F = 3.4V
4.1 4.3 4.5
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(100mA/div)
Turn-On to 1X Mode
(V_IN = 4.2V; 20mA Load)
Time (200μs/div)
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(200mA/div)
Turn-On to 1.5X Mode
(V_IN = 3.5V; 20mA Load)
Time (200μs/div)
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(500mV/div)
I_IN
(200mA/div)
Turn-On to 2X Mode
(V_IN = 2.8V; 20mA Load)
Time (200μs/div)
EN
(2V/div)
V_F
(1V/div)
I_IN
(100mA/div)
Turn-Off from 1.5X Mode
(V_IN = 3.5V; 20mA Load)
Time (200μs/div)
Diode Current vs. Temperature
(20mA/channel)
22.0
21.5
21.0
20.5
I_D1
20.0
I_D2
19.5
19.0
I_D3
I_D4
18.5
18.0
-40 -25 -10 5
20 35 50 65 80 95
Temperature (°C)
3155.2006.05.1.1
5