High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
Typical Characteristics
(Unless otherwise noted, V
IN
= 3.5V, C
IN
= C
CP
= C1 = C2 = 1µF, T
A
= 25°C)
Charge Pump to Load Switch
(1.5X Mode, 4x19mA Load)
V
IN
(500mV/div)
V
CP
(1V/div)
V
DIODE
(500mV/div)
I
IN
(50mA/div)
V
IN
(500mV/div)
V
CP
(1V/div)
V
DIODE
(500mV/div)
I
IN
(50mA/div)
AAT3141
Charge Pump to Load Switch
(1.5X Mode, 4x30mA Load)
5ms/div
5ms/div
Charge Pump to Load Switch
(2X Mode, 4x19mA Load)
V
IN
(500mV/div)
V
CP
(1V/div)
V
DIODE
(500mV/div)
I
IN
(50mA/div)
V
IN
(500mV/div)
V
CP
(1V/div)
V
DIODE
(500mV/div)
I
IN
(50mA/div)
Charge Pump to Load Switch
(2X Mode, 4x30mA Load)
5ms/div
5ms/div
Load Switch to Charge Pump
(1.5X Mode, 4x19mA Load)
V
IN
(1V/div)
V
CP
(4V/div)
V
DIODE
(500mV/div)
I
IN
(50mA/div)
V
IN
(1V/div)
V
CP
(4V/div)
V
DIODE
(500mV/div)
I
IN
(50mA/div)
Load Switch to Charge Pump
(1.5X Mode, 4x30mA Load)
2ms/div
2ms/div
3141.2004.07.0.91
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