AAT3120
3-Channel Charge Pump
For White LED Applications
Typical Characteristics
Efficiency vs. Input Voltage
(3x20mA)
95
90
95
Efficiency vs. Input Voltage
(3x8.3mA)
V
F
= 3.0V
V
F
= 3.2V
V
F
= 3.4V
V
F
= 3.0V
V
F
= 3.2V
V
F
= 3.4V
Efficiency (%)
90
85
80
75
70
65
60
55
Efficiency (%)
85
80
75
70
65
60
55
50
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
4.3
4.5
4.7
4.9
5.1
50
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
4.3
4.5
4.7
4.9
5.1
Input Voltage (V)
Input Voltage (V)
60mA Load Characteristics
Charge Pump to Load Switch (60mA)
V
IN
(20mV/div)
OUT
(20mV/div)
V
IN
(10mV/div)
OUT
(2V/div)
V
DIODE
(2V/div)
V
DIODE
(20mV/div)
Time (500ns/div)
I
IN
(100mA/div)
Time (100µs/div)
Load Switch to Charge Pump (60mA)
V
IN
(10mV/div)
OUT
(2V/div)
V
DIODE
(2V/div)
I
IN
(100mA/div)
Time (100µs/div)
6
3120.2005.11.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
