AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
Typical Characteristics-AAT3112-5.0V
VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted.
Output Voltage vs. Output Current Supply Current vs. Supply Voltage
(No Load, No Switching)
30
25
20
15
10
5
5.5
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
VIN = 3.9V
VIN = 4.2V
VIN = 3.6V
0
2.5
3.0
3.5
4.0
4.5
5.0
0
50
100
150
200
250
300
Output Current (mA)
Supply Voltage (V)
Startup Time with 100mA Load
Startup Time with 200mA Load
EN
(2V/div)
EN
(2V/div)
VOUT
(1V/div)
VOUT
(1V/div)
Time (50µs/div)
Time (50µs/div)
Efficiency vs. Input Voltage
Maximum Current Pulse vs. Input Voltage
(50ms pulse; VOUT > 4.5V)
95
90
85
80
75
70
65
60
55
50
45
100mA
1000
900
800
700
600
500
400
300
200mA
50mA
40
2.7
3.0
3.3
3.5
3.8
4.1
4.4
4.7
4.9
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Input Voltage (V)
Input Voltage (V)
3112.2007.01.1.5
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
