AAT3175 Datasheet, PDF (5/12 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump For White LED Flash Applications

AAT3175
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Flash Applications
Typical Characteristics
C_IN = C_OUT = C₁ = C₂ = 1µF, T_A = 25°C, V_IN = 3.5V, unless otherwise noted.
Efficiency vs. Supply Voltage
100
90
60mA
80 ^VF ^{= 3.0V}
70
60
150mA
V_F = 3.2V
50
40
30
2.7 2.8 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
Supply Voltage (V)
V_OUT
(2V/div)
I_OUT
(200mA/div)
300mA LED Pulse
(V_IN = 3.8V)
Time (100ms/div)
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(400mA/div)
Turn-On to 1X Mode
(V_IN = 4.2V; 300mA Load)
Time (200µs/div)
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(400mA/div)
Turn-On to 1.5X Mode
(V_IN = 4.0V; 300mA Load)
Time (200µs/div)
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(400mA/div)
Turn-On to 2X Mode
(V_IN = 3.8V; 300mA Load)
Time (200µs/div)
EN
(2V/div)
V_F
(1V/div)
I_IN
(200mA/div)
Turn-Off from 1.5X Mode
(V_IN = 4.0V; 300mA Load)
Time (200µs/div)
3175.2006.01.1.2
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