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FAN5362UMP33X Datasheet(PDF) 5 Page - Fairchild Semiconductor

Part # FAN5362UMP33X
Description  3MHz, 500mA / 750mA Synchronous Buck Regulator
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5362UMP33X Datasheet(HTML) 5 Page - Fairchild Semiconductor

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© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5362 • Rev. 1.0.1
5
Typical Characteristics
Unless otherwise noted, VIN=VEN=3.6V,VMODE=0 (AUTO), VOUT=2.9V, COUT=10µF, and TA=25°C.
80%
82%
84%
86%
88%
90%
92%
94%
96%
98%
100%
1
10
100
1000
I LOAD Output Current (mA)
VIN = 3.2, Mode=0
VIN = 3.6, Mode=0
VIN = 4.2, Mode=0
VIN = 3.2, Mode=1
VIN = 3.6, Mode=1
VIN = 4.2, Mode=1
2.885
2.890
2.895
2.900
2.905
2.910
-
100
200
300
400
500
I LOAD Output Current (mA)
Auto 3.6VIN
Auto 3.2VIN
Figure 4. Efficiency vs. Load Current and Input Supply
Figure 5. Load Regulation
0
10
20
30
40
50
60
70
80
90
0
100
200
300
400
500
Load current (mA)
3.2VIN_Auto
3.6VIN_AUTO
0
500
1000
1500
2000
2500
3000
3500
0
50
100
150
200
250
300
350
400
450
500
Load Current(mA)
3.2VIN_AUTO
3.6VIN_AUTO
3.6VIN_FPWM
3.2VIN_FPWM
Figure 6. Ripple
Figure 7. Effect of tOFF(MIN) on Reducing Switching
Frequency
0
50
100
150
200
250
300
350
400
450
500
3
3.5
4
4.5
5
5.5
Input Voltage(V)
100
%
d.c
.
Always PWM
Always PFM
Hysteresis
600
700
800
900
1000
1100
1200
1300
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
‐40C
+25C
+85C
Figure 8. PFM / PWM Boundaries
Figure 9. Peak Inductor Current


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