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FAN5358S712X 数据表(PDF) 5 Page - Fairchild Semiconductor

部件名 FAN5358S712X
功能描述  2MHz, 500mA, SC70 Synchronous Buck Regulator
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

FAN5358S712X 数据表(HTML) 5 Page - Fairchild Semiconductor

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© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5358 • Rev. 1.0.1
5
Typical Characteristics
Unless otherwise noted, VIN = VEN = 3.6V, VOUT = 1.8V, and TA = 25°C.
60
65
70
75
80
85
90
95
0.001
0.01
0.1
1
Load Current (A)
2.7VIN
3.6VIN
4.2VIN
60
70
80
90
100
0.001
0.01
0.1
1
Load Current (A)
25°C
-40°C
85°C
VIN=3.6V
Figure 4. Efficiency vs. Load Current and Input Supply
Figure 5. Efficiency vs. Load Current and Temperature
1.780
1.785
1.790
1.795
1.800
1.805
1.810
1.815
0
0.1
0.2
0.3
0.4
0.5
0.6
Load Current (A)
2.7VIN
3.6VIN
4.2VIN
5.5VIN
0
5
10
15
20
1
10
100
1000
Load Current (mA)
2.7VIN
3.6VIN
5.5VIN
Figure 6. Voltage Regulation
Figure 7. Peak-to-Peak Output Voltage Ripple
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.1
0.2
0.3
0.4
0.5
0.6
Load Current (A)
2.7VIN
3.6VIN
5.5VIN
80
100
120
140
160
180
2.7
3.2
3.7
4.2
4.7
5.2
Input Voltage (V)
Always PWM
Always PFM
The switching mode
changes at these borders
PFM Border
PWM Border
Figure 8. Switching Frequency vs. Load Current
Figure 9. PFM / PWM Boundaries


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