High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
C
IN
= C
OUT
= C
1
= C
2
= 1.0µF; T
A
= 25°C, V
IN
= 3.6V, unless otherwise noted.
Load Characteristics
(V
IN
= 3.9V; 1.5X Mode; 18mA Load)
AAT3167
Load Characteristics
(V
IN
= 2.9V; 2X Mode; 18mA Load)
V
IN
(40mV/div)
CP
(40mV/div)
V
SINK
(40mV/div)
V
IN
(40mV/div)
CP
(40mV/div)
V
SINK
(40mV/div)
Time (500ns/div)
Time (500ns/div)
Load Characteristics
(V
IN
= 4.2V; 1.5X Mode; 27mA Load)
Load Characteristics
(V
IN
= 3.3V; 2X Mode; 27mA Load)
V
IN
(40mV/div)
CP
(40mV/div)
V
SINK
(40mV/div)
V
IN
(40mV/div)
CP
(40mV/div)
V
SINK
(40mV/div)
Time (500ns/div)
Time (500ns/div)
Input Ripple vs. Input Voltage
18
16
27mA
18mA
Input Ripple (mV)
14
12
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
3167.2007.03.1.4