High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
Unless otherwise noted, V
IN
= 3.5V, C
IN
= C
OUT
= C
1
= C
2
= 1µF, T
A
= 25°C.
Load Characteristics
(V
IN
= 3.8V; 1.5X Mode; 18mA Load)
AAT3166
Load Characteristics
(V
IN
= 2.8V; 2X Mode; 18mA Load)
V
IN
(40mV/div)
V
OUT
(40mV/div)
V
SINK
(40mV/div)
V
IN
(40mV/div)
V
OUT
(40mV/div)
V
SINK
(40mV/div)
500ns/div
500ns/div
Load Characteristics
(V
IN
= 4.1V; 1.5X Mode; 27mA Load)
Load Characteristics
(V
IN
= 3.2V; 2X Mode; 27mA Load)
V
IN
(40mV/div)
V
OUT
(40mV/div)
V
IN
(40mV/div)
V
OUT
(40mV/div)
V
SINK
(40mV/div)
V
SINK
(40mV/div)
500ns/div
500ns/div
Input Ripple vs. Input Voltage
12
27mA
18mA
Input Ripple (mV)
10
8
6
4
2
0
2.5
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
4.3
4.5
14mA
Input Voltage (V)
6
3166.2006.05.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
