CAT3643
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.6V, IOUT = 60mA (3 LEDs at 20mA), CIN = COUT = C1 = C2 = 1μF, TAMB = 25°C unless otherwise specified.
Efficiency vs. Input Voltage
Efficiency vs. Li-Ion Voltage
100
90
80
70
60
50
40
100
90
80
70
60
50
40
1.33x
VF = 3.3V
1x
VF = 3.3V
1.5x
1x
1.33x
2x
4.2 4.0 3.8 3.6 3.4 3.2 3.0
INPUT VOLTAGE [V]
4.5
4.0
3.5
3.0
2.5
2.0
INPUT VOLTAGE [V]
Quiescent Current vs. Input Voltage
Quiescent Current vs. Temperature
4.0
4.0
VF = 3.3V
2x
1.5x
3.0
2.0
1.0
0.0
3.0
2.0
1.0
1.33x
1x
LEDs Off
0.0
-40
0
40
80
120
5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0
INPUT VOLTAGE [V]
TEMPERATURE [°C]
LED Current Change vs. Input Voltage
LED Current Change vs. Temperature
10
10
VF = 3.3V
8
VF = 3.3V
8
6
4
6
4
2
2
0
0
-2
-4
-6
-8
-10
-2
-4
-6
-8
-10
-40
0
40
80
120
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE [V]
TEMPERATURE [°C]
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc. No. 5022, Rev. B
CATALYST [ CATALYST SEMICONDUCTOR ]
