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; 20mA Load)
AAT3155
Load Characteristics
(V
IN
= 3.9V; 1.5X Mode; 14mA Load)
V
IN
(40mV/div)
V
CP
(40mV/div)
V
SINK
(20mV/div)
V
IN
(40mV/div)
V
CP
(20mV/div)
V
SINK
(20mV/div)
Time (500ns/div)
Time (500ns/div)
Load Characteristics
(V
IN
= 2.9V; 2X Mode; 20mA Load)
Load Characteristics
(V
IN
= 2.9V; 2X Mode; 14mA Load)
V
IN
(40mV/div)
V
CP
(40mV/div)
V
SINK
(40mV/div)
V
IN
(40mV/div)
V
CP
(40mV/div)
V
SINK
(40mV/div)
Time (500ns/div)
Time (500ns/div)
Input Ripple vs. Input Voltage
EN/SET Latch Timeout (μs)
μ
14.0
12.0
350
300
250
200
150
100
50
0
EN/SET Latch Timeout vs. Input Voltage
Input Ripple (mV)
20mA/channel
14mA/channel
10.0
8.0
6.0
4.0
2.0
0.0
2.5
3.0
-40°C
10mA/
channel
3.5
4.0
4.5
5.0
5.5
25°C
85°C
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
6
3155.2006.05.1.1