Dual High Efficiency Charge Pump
for White LED and Flash Applications
Typical Characteristics–Flash Driver Charge Pump Section
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)
AAT2805
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)
Supply Current vs. Supply Voltage
I
OUT
= 0μA
C
3
= 1μF
V
EN_FL
= V
IN
Oscillator Frequency vs. Supply Voltage
Oscillator Frequency (MHz)
1.30
3.00
Supply Current (mA)
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
2.5
1.25
+25°C
1.20
+85°C
-40°C
1.15
3.0
3.5
4.0
4.5
5.0
1.10
2.7
3.2
3.7
4.2
4.7
Supply Voltage (V)
Supply Voltage (V)
6
2805.2006.04.1.7