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| AAT2801 Datasheet, PDF (11/20 Pages) Advanced Analogic Technologies – Multi-Mode Charge Pump for White LED Backlight and Flash Applications | |||
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AAT2801
Multi-Mode Charge Pump for
White LED Backlight and Flash Applications
Typical CharacteristicsâFlash Driver Charge Pump Section
VIN = 3.5V, CIN = 2.2µF, C3 = CF = 1.0µF, TA = 25°C, unless otherwise noted.
Output Voltage vs. Output Current
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
0
VIN=3.3 VIN=3.6
VIN = 2.7
VIN = 3.0
40
80
120
160
200
Output Current (mA)
Efficiency vs. Supply Voltage
100
90
50mA
80
70
60
50 100mA
150mA
40
30
20
10
0
2.7
3.0
3.3
3.6
3.9
4.2
4.5
Supply Voltage (V)
Efficiency vs. Load Current
100
90
80
70
60
50
40
30
20
10
0
0.1
VIN = 2.7V
VIN = 3.0V
VIN = 3.3V
VIN = 3.6V
1.0
10
100
1000
Load Current (mA)
Maximum Current Pulse vs. Supply Voltage
600
500
400
300
200
One-shot pulse duration = 250ms
VOUT> 4.0V
100
0
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Supply Voltage (V)
Load Response
(100mA Load)
VIN = 3.5V
VOUT
(10mV/div)
IOUT
(50mA/div)
2801.2006.04.1.3
Time (5ms/div)
Load Response
(50mA Load)
VOUT
(10mV/div)
VIN = 3.5V
IOUT
(20mA/div)
Time (5ms/div)
11
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