FAN5354 查看數據表（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.
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
VIN = 3.3V, Mode=0
VIN = 3.3V, Mode=1
VIN = 5V, Mode=0
VIN = 5V, Mode=1
0%
1
10
100
1000
I LOAD Output Current (mA)
Figure 3. Efficiency vs. ILOAD at VOUT=1.2 V
10000
100%
90%
80%
70%
60%
50%
40%
30%
20%
VIN = 3.3V, Mode = 0
VIN = 3.3V, Mode = 1
VIN = 5V, Mode = 0
VIN = 5V, Mode = 1
10%
0%
1
10
100
1000
I LOAD Output Current (mA)
10000
Figure 4. Efficiency vs. ILOAD at VOUT=1.8 V
1
0.9
0.8
0.7
0.6
0.5
85°C
0.4
25°C
0.3
‐40°C
0.2
0.1
0
2.7
3.2
3.7
4.2
4.7
5.2
Input Voltage(V)
Figure 5. Shutdown Supply Current vs. VIN, EN=0
350
325
300
275
250
85°C
225
25°C
–40°C
200
2.7
3.2
3.7
4.2
4.7
5.2
Input Voltage(V)
Figure 6. Quiescent Current in PFM vs. VIN, No Load
800
700
600
500
400
300
200
100
0
2.7
1.2VOUT boundary
1.2VOUT boundary
Always PWM
Hysteresis
Always PFM
3.2
3.7
4.2
4.7
5.2
Input Voltage(V)
Figure 7. PFM / PWM Mode-Change Boundaries
© 2009 Fairchild Semiconductor Corporation
FAN5354 • Rev. 1.0.7
5
www.fairchildsemi.com
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