High Current, High Efficiency Charge Pump
Typical Characteristics
V
IN
= 3.6V, C
IN
= 4.7µF, C
OUT
= 2.2µF, C
1
= C
2
= 1µF, T
A
= 25°C, unless otherwise noted.
Operating Characteristic
(V
IN
= 3.3V; 1.5X Mode; I
LED
= 300mA)
V
IN
(100mV/div)
V
OUT
(200mV/div)
V
SINK
(200mV/div)
AAT3174
Operating Characteristic
(V
IN
= 2.9V; 2X Mode; I
LED
= 300mA)
V
IN
(100mV/div)
V
OUT
(200mV/div)
V
SINK
(200mV/div)
Time (2µs/div)
Time (2µs/div)
LED Current vs. R
SET
(Data = 1)
1000
900
800
700
160
140
120
T
LAT
vs. V
IN
-40°C
25°C
I
LED
(mA)
600
500
400
300
200
100
0
100
200
300
400
500
600
700
800
900
1000
T
LAT
(µs)
100
80
60
40
20
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9
4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
85°C
R
SET
(kΩ)
Ω
Input Voltage (V)
T
OFF
vs. V
IN
180
160
140
120
100
80
60
40
20
0
2.7 2.9
3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9
5.1 5.3 5.5
25°C
-40°C
85°C
T
OFF
(µs)
Input Voltage (V)
6
3174.2006.05.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
