AAT3123/23A/24
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
EN/SET
(1V/div)
EN/SET
(1V/div)
OUT
(2V/div)
OUT
(2V/div)
VDIODE
(2V/div)
VDIODE
(1V/div)
IIN
IIN
(100mA/div)
(200mA/div)
Time (50µs/div)
Time (50µs/div)
Load Switch to Charge Pump
Charge Pump to Load Switch
(80mA)
(80mA)
VIN
VIN
(10mV/div)
(20mV/div)
OUT
(2V/div)
OUT
(1V/div)
VDIODE
(2V/div)
VDIODE
(1V/div)
IIN
IIN
(100mA/div)
(200mV/div)
Time (50µs/div)
Time (50µs/div)
Turn-Off
80mA Load Characteristics
VIN
EN/SET
(1V/div)
VDIODE
(2V/div)
OUT
IIN
(100mA/div)
VDIODE
Time (1µs/div)
Time (200µs/div)
6
3123.2005.12.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
