PRODUCT DATASHEET
AAT3169
SwitchReg
TM
High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Typical Characteristics
C
IN
= C
OUT
= C
1
= C
2
= 1.0µF, V
IN
= 3.6V, T
A
= 25°C, unless otherwise noted.
Efficiency vs. Supply Voltage
100
90
4.9mA/ch
V
F
= 2.9V
10.9mA/ch
V
F
= 3.1V
20mA/ch
V
F
= 3.4V
Turn-On to 1X Mode
(V
IN
= 4.2V; 20mA/Channel)
Efficiency (%)
EN
(2V/div)
CP
(2V/div)
V
SINK
(500mV/div)
I
IN
(200mA/div)
80
70
60
50
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Supply Voltage (V)
Time (100µs/div)
Turn-On to 1.5X Mode
(V
IN
= 3.8V; 20mA/Channel)
Turn-On to 2X Mode
(V
IN
= 2.8V; 20mA/Channel)
EN
(2V/div)
CP
(2V/div)
V
SINK
(500mV/div)
I
IN
(200mA/div)
EN
(2V/div)
CP
(2V/div)
V
SINK
(500mV/div)
I
IN
(200mA/div)
Time (100µs/div)
Time (100µs/div)
Turn-Off from 1.5X Mode
(V
IN
= 3.5V; 20mA/Channel)
20.2
Current Matching vs. Temperature
Channel 2
20.0
Channel 1
EN
(2V/div)
Current (mA)
V
F
(1V/div)
I
IN
(100mA/div)
19.8
19.6
19.4
19.2
-40
-20
0
20
40
60
Channel 3
Channel 5
Channel 4
Channel 6
80
Time (100µs/div)
Temperature (°C)
°
3169.2008.03.1.3
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