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FAN2108 数据表(PDF) 8 Page - Fairchild Semiconductor

部件名 FAN2108
功能描述  TinyBuck??3-24 V Input, 8 A, High-Efficiency, Integrated Synchronous Buck Regulator
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

FAN2108 数据表(HTML) 8 Page - Fairchild Semiconductor

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© 2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN2108 • Rev. 1.0.2
8
Application Circuit
SW
P1
PGND
P3
VOUT
P2
VIN
BOOT
1
COMP
VCC
PGOOD
8-20 VIN
EN
+5V
AGND
RAMP
20
15
25
13
14
16
18
R(T)
17
ILIM
24
19
FB
VOUT
3 x 4.7u
* Inter-Technical
SC7232-2R2M
390p
1.5
4 x 22u
3.3n
200K
200K
2.00K
30.1K
3.3n
1.0u
10K
2.49K
2.49K
56p
4.7n
62
4.7n
0.1u
2.2u *
X5R
X7R
X5R
NC
Figure 10. Application Circuit: 1.8 VOUT, 500 KHz
Typical Performance Characteristics
Typical operating characteristics using the circuit shown in Figure 10. VIN=12 V, VCC=5 V, unless otherwise specified.
Efficiency @ Vo=1.8V, fsw=500KHz, Ta=25
0C
70
75
80
85
90
95
02
4
6
8
Load Current (A)
Vin=8V
Vin=12V
Vin=16V
Vin=20V
Vin=24V
Efficiency @ Vo=3.3V, fsw=300KHz, Ta=25
0C
70
75
80
85
90
95
100
02
4
6
8
Load Current (A)
Vin=5V
Vin=10V
Vin=12V
Vin=14V
Vin=20V
Figure 11.
1.8 VOUT Efficiency Over VIN vs. Load
Figure 12. 3.3 VOUT Efficiency Over VIN vs. Load
Efficiency@ Vin=12V, Vo=1.8V
70
75
80
85
90
95
0
1
23
456
78
Load Current (A)
300KHz
500KHz
600KHz
Load Regulation @ Vo=0.8V, 500kHz, 25°C
0.7992
0.7994
0.7996
0.7998
0.8
0.8002
0.8004
0.8006
0.8008
0.801
0.8012
0
1
23
4
5
67
8
Load Current (A)
Vin=8V
Vin=12V
Vin=16V
Vin=20V
Vin=24V
Figure 13. 1.8 VOUT Efficiency Over Frequency
vs. Load
Figure 14. 0.8 VOUT Load Regulation Over VIN
vs. Load
Typical Performance Characteristics (Continued)


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