High Efficiency 1.5X Fractional Charge
Pumps For White LED Applications
Typical Characteristics
(unless otherwise noted: V
IN
=3.5V, C
IN
=C
OUT
=C1=C2=1µF, T
A
=25°C)
Normalized I
DIODE
vs. Temperature
1.020
1.010
1.000
AAT3113/4
I
DIODE
Response
-31dB to 0dB
ENSET
(2V/div)
0 dB
I
DIODE
0.990
0.980
0.970
0.960
0.950
-40
-20
0
20
40
60
80
100
I
DIODE
-31 dB
Temperature (°C)
10
µs/div
I
DIODE
vs. VIN
140
120
I
DIODE
Response
-9dB to -10dB
ENSET
(2V/div)
0 dB
-10 dB
I
DIODE
-9 dB
-31 dB
I
DIODE
(mA)
100
80
60
40
20
0
3.0
3.5
4.0
4.5
V
IN
(V)
10
µ
s/div
I
DIODE
vs. V
DIODE
140
120
1.000
V
IH
and V
IL
vs. VIN
I
DIODE
(mA)
100
80
60
40
20
0
3.0
3.2
3.4
3.6
3.8
4.0
V
IH
and V
IL
(V)
0.975
0.950
0.925
0.900
0.875
0.850
0.825
0.800
0.775
0.750
2.5
3.0
3.5
4.0
4.5
5.0
5.5
V
IH
V
IL
V
DIODE
(V)
VIN (V)
3113.2004.07.1.4
5