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Typical Characteristics
Unless otherwise noted, C IN = 4.7μF, V EN =1.8V, T A = 25°C, white LED with V F =3.3V at I OUT =10mA.
48.0
47.5
47.0
R EXT = 500K
+25°C
474.3
474.2
R EXT = 500K
46.5
46.0
45.5
45.0
44.5
44.0
43.5
-40°C
+85°C
474.1
474.0
473.9
473.8
43.0
6
8
10
12
14
16
18
20
473.7
6
8
10
12
14
16
18
20
22
Input Voltage (V)
Figure 4. Quiescent Current vs. Input Voltage
Input Voltage (V)
Figure 5. RSET Voltage vs. Input Voltage
10
9
8
7
6
5
4
V EN = 0V
+25°C
-40°C
+85°C
12
10
8
6
4
2
0
6
8
10 12 14
Input Voltage (V)
16
18
20
0
1
2 3
Enable Voltage (V)
4
5
Figure 6. Shutdown Current vs. Input Voltage
2.0
Figure 7. Enable Input Current vs. Enable Voltage
2.5
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
2.0
1.5
1.0
0.5
I OUT =25mA
0.2
0.0
0.5
5.5
10.5
15.5
20.5
25.5
0.0
-40
I OUT =2.5mA
-20
0
20
40
60
80
LED Current (mA)
Figure 8. Dropout Voltage vs. LED Current
? 2006 Fairchild Semiconductor Corporation
FAN5640 ? Rev. 1.0.2
5
Temperature (°C)
Figure 9. Dropout Voltage vs. Temperature
www.fairchildsemi.com
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