AAT3142
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
Typical Characteristics
V
IN
= 3.5V, C
IN
= C
CP
= C
1
= C
2
= 1µF, T
A
= 25°C, unless otherwise noted.
Turn-On to 1X Mode
(3x19mA Load)
EN/SET
(2V/div)
V
CP
(4V/div)
V
DIODE
(2V/div)
I
IN
(100mA/div)
EN/SET
(2V/div)
V
CP
(4V/div)
V
DIODE
(2V/div)
I
IN
(100mA/div)
Turn-On to 1X Mode
(3x30mA Load)
Time (100µs/div)
Time (100µs/div)
Turn-On to 1.5X Mode
(3x19mA Load)
EN/SET
(2V/div)
V
CP
(4V/div)
V
DIODE
(2V/div)
I
IN
(100mA/div)
EN/SET
(2V/div)
V
CP
(4V/div)
V
DIODE
(2V/div)
I
IN
(100mA/div)
Turn-On to 1.5X Mode
(3x30mA Load)
Time (100µs/div)
Time (100µs/div)
Turn-Off from Full-Scale 2X Mode
EN/SET
(2V/div)
V
DIODE
(2V/div)
I
IN
(200mA/div)
Time (200µs/div)
6
3142.2005.12.1.1