AAT3112 Datasheet, PDF (6/16 Pages) Advanced Analogic Technologies – 500mA High Efficiency Charge Pump for White LED Flash Applications

AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
Typical Characteristics-AAT3112-4.5V
V_IN = 3.5V, C_IN = C_OUT = 10μF, C₁ = C₂ = 1μF; T_A = 25°C, unless otherwise noted.
Output Voltage vs. Output Current
5.0
4.9
4.8 _{VIN = 3.6V VIN = 3.9V}
4.7
4.6
4.5
4.4 ^{VIN = 4.2V}
4.3
4.2
4.1
4.0
0
50
100
150
200
250
300
Output Current (mA)
Supply Current vs. Supply Voltage
(No Load, No Switching)
30
25
20
15
10
5
0
2.5
3.0
3.5
4.0
4.5
Supply Voltage (V)
Startup Time with 100mA Load
EN
(2V/div)
V_OUT
(1V/div)
Time (50µs/div)
Startup Time with 200mA Load
EN
(2V/div)
V_OUT
(1V/div)
Time (50µs/div)
Maximum Current Pulse vs. Input Voltage
(50ms pulse; V_OUT > 4.0V)
800
700
600
500
400
300
3
3.2
3.4
3.6
3.8
4
4.2
Input Voltage (V)
6
Efficiency vs. Input Voltage
85
80
50mA
75
70
65
200mA
60
100mA
55
50
45
40
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
Input Voltage (V)
3112.2007.01.1.5