FAN5354 データシートの表示（PDF） - ON Semiconductor
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FAN5354 Datasheet PDF : 16 Pages
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Typical Characteristics
Unless otherwise specified, VIN=5 V, VOUT=1.2 V, circuit of Figure 1, and components per Table 1.
PFM
PWM
16
14
12
10
8
6
4
2
0
0.1
5VIN, 1.2VOUT
3.3VIN, 1.2VOUT
1
10
100
Load Current(mA)
1000
10000
Figure 8. Output Voltage Ripple vs. Load Current
(See explanation on page 12)
90
80
70
60
50
40
1.2VOUT,1.5A load
30
20
0.01
0.1
1
10
100
Frequency (KHz)
Figure 9. Power Supply Rejection Ratio (PSRR)
VOUT
IL
Figure 10. PFM-to-PWM Mode Transition, Slowly
Increasing Load Current, 2 µs/div.
31.0
30.0
29.0
28.0
TJ = 85°C
TJ = 25°C
TJ = –40°C
27.0
26.0
25.0
24.0
2.5
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Figure 12. PFM frequency, ILOAD = 0
Figure 11 PWM-to-PFM Mode Transition, Slowly
Decreasing Load Current, 2 µs/div.
© 2009 Fairchild Semiconductor Corporation
FAN5354 • Rev. 1.0.7
6
www.fairchildsemi.com
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