AAT2806
Dual High Efficiency Charge Pump
for White LED and Flash Applications
Typical Characteristics– Flash Driver Charge Pump Section
Output Voltage vs. Output Current
(V
OUT_FL
= 4.5V; EN_FL = V
IN
; EN/SET = GND)
4.60
Maximum Current Pulse vs. Supply Voltage
(V
OUT_FL
= 4.5V; EN_FL = V
IN
; EN/SET = GND)
Maximum Current Pulse (mA)
450
400
350
300
250
200
150
100
50
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
Output Voltage (V)
One-shot pulse duration = 250ms
V
OUT
> 4.0V
4.56
4.52
4.48
3.6V
3.0V
4.44
3.3V
2.7V
4.40
0.1
1.0
10.0
100.0
1000.0
Output Current (mA)
Supply Voltage (V)
Load Response vs. Time
(50mA Load)
V
IN
= 3.5V
V
OUT_FL
(10mV/div)
V
OUT_FL
(10mV/div)
Load Response vs. Time
(100mA Load)
V
IN
= 3.5V
I
OUT
(20mA/div)
I
OUT
(50mA/div)
Time (5ms/div)
Time (5ms/div)
Output Ripple Voltage vs. Time
(I
OUT
= 50mA @ V
IN
= 3.5V)
V
IN
(10mV/div)
V
OUT
(10mV/div)
V
IN
(10mV/div)
V
OUT
(20mV/div)
Output Ripple Voltage vs. Time
(I
OUT
= 100mA @ V
IN
= 3.5V)
I
IN
(10mA/div)
I
IN
(10mA/div)
Time (500ns/div)
Time (500ns/div)
2806.2007.09.1.9
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
