AAT2805 Datasheet, PDF (5/17 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 Voltage vs. Output Current
(V_{OUT_FL} = 4.5V; EN_FL = V_IN; EN/SET = GND)
4.60
4.56
4.52
3.6V
4.48
4.44
4.40
0.1
3.0V 3.3V
2.7V
1.0
10.0
100.0
Output Current (mA)
1000.0
Maximum Current Pulse vs. Supply Voltage
(V_{OUT_FL} = 4.5V; EN_FL = V_IN; EN/SET = GND)
450
One-shot pulse duration = 250ms
400 _{VOUT > 4.0V}
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
Supply Voltage (V)
EN_FLSH
(1V/div)
Startup Time
(50mA Load)
EN_FLSH
(1V/div)
Startup Time
(100mA Load)
V_{OUT_FL}
(1V/div)
100µs/div
V_{OUT_FL}
(1V/div)
100µs/div
Load Response vs. Time
(50mA Load)
V_{OUT_FL}
(10mV/div)
V_IN = 3.5V
I_OUT
(20mA/div)
5ms/div
Load Response vs. Time
(100mA Load)
V_IN = 3.5V
V_{OUT_FL}
(10mV/div)
I_OUT
(50mA/div)
5ms/div
2805.2005.05.1.2
5