AAT3123/4
High Efficiency 1X/1.5X Fractional Charge
Pump for White LED Applications
Typical Characteristics
(Unless otherwise noted, VIN = 3.5V, CIN = COUT = C1 = C2 = 1µF, TA = 25°C)
Turn-On to Full Scale Charge-Pump
Turn-On to Full Scale Load-Switch
ENSET
(1V/div)
OUT
(2V/div)
VDIODE
(1V/div)
IIN
(200mA/div)
50µs/div
ENSET
(1V/div)
OUT
(2V/div)
VDIODE
(2V/div)
IIN
(100mA/div)
50µs/div
Charge Pump to Load Switch (80mA)
VIN
(10mV/div)
OUT
(2V/div)
VDIODE
(2V/div)
IIN
(100mA/div)
50µs/div
ENSET
(1V/div)
VDIODE
(2V/div)
IIN
(100mA/div)
Turn-Off
200µs/div
Load Switch to Charge Pump (80mA)
VIN
(20mV/div)
OUT
(1V/div)
VDIODE
(1V/div)
IIN
(200mV/div)
50µs/div
80mA Load Characteristics
VIN
OUT
VDIODE
1µs/div
6
3123.2003.09.1.1