FAN8303 Fairchild Semiconductor, FAN8303 Datasheet - Page 7

• Manufacturer Part Number: FAN8303
• Description: The FAN8303 is a monolithic, non-synchronous, stepdown (buck) regulator with internal power MOSFETs
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN8303 • Rev. 1.0.0
CH4
CH2
CH1
Typical Performance Characteristics
V
IN
Figure 14. Oscillator Frequency vs. Temperature
= 12V, V
380
370
360
350
340
330
320
95
90
85
80
75
70
Figure 10. Hard-Short at Output (OCP)
-40
0
OUT
Figure 12. Efficiency Curve
= 5V, L1 = 15μH, C
-15
Temperature [℃]
0.5
Load Current [A]
10
1
35
CH1(VO) : 2V, 20µ/div.
CH2(VIN) : 4V, 20µs/div.
CH3(SW) : 6V, 20µs/div.
CH4(IL) : 2A, 20µs/div.
IN
= 10μF, C
1.5
60
1.8Vo
2.5Vo
5.0Vo
3.3Vo
OUT
2
85
= 22μF, T
(Continued)
7
CH1
CH2
CH4
A
= +25
Figure 15. Current Limited Level vs. Duty Ratio
-0.5
-1.5
Figure 13. Normalized Output Voltage vs.
0.5
3.5
2.5
-1
o
1
0
Figure 11. Overload at Output (OCP)
C, unless otherwise noted.
4
3
2
-40
0
-15
20
Temperature [℃]
Δf=45kHz
10
40
Temperature
Duty [%]
35
60
CH1(VO) : 2V, 20µ/div.
CH2(VIN) : 4V, 20µs/div.
CH3(SW) : 6V, 20µs/div.
CH4(IL) : 2A, 20µs/div.
60
80
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85
100