AAT3166
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
Unless otherwise noted, VIN = 3.5V, CIN = COUT = C1 = C2 = 1µF, TA = 25°C.
Efficiency vs. Supply Voltage
Turn-On to 1X Mode
(VIN = 4.2V; 18mA Load)
100
18mA
F = 3.4V
90
V
EN
(2V/div)
80
70
60
50
40
30
20
10
0
VOUT
(2V/div)
VSINK
(500mV/div)
5.1mA
F = 3.0V
V
350μA
F = 2.7V
IIN
(200mA/div)
V
2.5 2.8 3.0 3.3 3.5 3.8 4.0 4.3 4.5 4.8 5.0 5.3 5.5
Supply Voltage (V)
100μμs/div
Turn-On to 1.5X Mode
(VIN = 3.5V; 18mA Load)
Turn-On to 2X Mode
(VIN = 2.8V; 18mA Load)
EN
(2V/div)
EN
(2V/div)
VOUT
(2V/div)
VOUT
(2V/div)
VSINK
(500mV/div)
VSINK
(500mV/div)
IIN
(200mA/div)
IIN
(200mA/div)
100μs/div
100μs/div
Turn-Off from 1.5X Mode
(VIN = 3.5V; 18mA Load)
Current Matching vs. Temperature
19.0
18.8
18.6
18.4
18.2
18.0
17.8
17.6
17.4
17.2
17.0
EN
(2V/div)
Channel 2
VF
(1V/div)
Channel 3
Channel 4
Channel 1
IIN
(100mA/div)
-40
-20
0
20
40
60
80
100μs/div
Temperature (°C)
3166.2006.05.1.2
5
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