AAT2806
Dual High Efficiency Charge Pump
for White LED and Flash Applications
Typical Characteristics–Flash Driver Charge Pump Section
Output Voltage vs. Output Current
(VOUT_FL = 4.5V; EN_FL = VIN; EN/SET = GND)
Maximum Current Pulse vs. Supply Voltage
(VOUT_FL = 4.5V; EN_FL = VIN; EN/SET = GND)
4.60
4.56
4.52
4.48
4.44
4.40
450
One-shot pulse duration = 250ms
400
VOUT > 4.0V
350
300
250
200
150
100
50
3.6V
3.0V
2.7V
3.3V
0
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
0.1
1.0
10.0
100.0
1000.0
Output Current (mA)
Supply Voltage (V)
Start-Up Time
(50mA Load)
Start-Up Time
(100mA Load)
EN_FLSH
(1V/div)
EN_FLSH
(1V/div)
VOUT_FL
(1V/div)
VOUT_FL
(1V/div)
Time (100µs/div)
Time (100µs/div)
Load Response vs. Time
(50mA Load)
Load Response vs. Time
(100mA Load)
VIN = 3.5V
VIN = 3.5V
VOUT_FL
(10mV/div)
VOUT_FL
(10mV/div)
IOUT
(20mA/div)
IOUT
(50mA/div)
Time (5ms/div)
Time (5ms/div)
2806.2006.04.1.8
5
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
