AAT2805 Datasheet, PDF (6/17 Pages) Advanced Analogic Technologies – Dual High Efficiency Charge Pump for White LED and Flash Applications

AAT2805
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)
Output Ripple Voltage vs. Time
(I_OUT = 100mA @ V_IN = 3.5V)
V_IN
(10mV/div)
V_IN
(10mV/div)
V_OUT
(10mV/div)
V_OUT
(20mV/div)
I_IN
(10mA/div)
I_IN
(10mA/div)
500ns/div
500ns/div
Supply Current vs. Supply Voltage
3.00
2.75
I_OUT = 0µA
C₃ = 1µF
2.50 _{VEN_FL = VIN}
2.25
2.00
1.75
1.50
1.25
1.00
2.5
3.0
3.5
4.0
4.5
5.0
Supply Voltage (V)
Oscillator Frequency vs. Supply Voltage
1.30
1.25
+25°C
1.20
+85°C
1.15
-40°C
1.10
2.7
3.2
3.7
4.2
4.7
Supply Voltage (V)
6
2805.2005.05.1.2