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FAN5071 Folha de dados(PDF) 8 Page - Fairchild Semiconductor

Nome de Peças FAN5071
Descrição Electrónicos  High Performance Programmable Synchronous DC-DC Controller for Multi-Voltage Platforms
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Fabricante Electrônico  FAIRCHILD [Fairchild Semiconductor]
Página de início  http://www.fairchildsemi.com
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FAN5071 Folha de dados(HTML) 8 Page - Fairchild Semiconductor

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FAN5071
8
REV. 1.0.4 1/29/02
Table 3. FAN5071 Application Bill of Materials for Intel VRM8.5 Motherboards
(Components based on Worst Case Analysis—See Appendix for Details)
Notes:
1. Inductor L1 is recommended to isolate the 5V input supply from noise generated by the MOSFET switching, and to comply with
Intel dI/dt requirements. L1 may be omitted if desired.
2. For 30A designs using the TO-220 MOSFETs, heatsinks with thermal resistance
Θ
SA < 20°C/W should be used. For designs
using the TO-263 MOSFETs, adequate copper area should be used. For details and a spreadsheet on MOSFET selections,
refer to Applications Bulletins AB-8 and AB-15.
Reference
Manufacturer Part #
Quantity
Description
Requirements/Comments
C1
AVX
TAJB475M010R5
1
4.7µF, 10V Capacitor
C2, C5
Panasonic
ECU-V1C105ZFX
2
1µF, 16V Capacitor
C3-4,C6
Panasonic
ECU-V1H104ZFX
3
100nF, 50V Capacitor
C7-9
Sanyo
6MV1000FA
3
1000µF, 6.3V
Electrolytic
CIN
Rubycon
16ZL1000M
4
1000µF, 16V
Electrolytic
IRMS = 2.3A
COUT
Rubycon
6.3ZL1500M
8
1500µF, 6.3V
Electrolytic
ESR
≤ 23mΩ
D1
Motorola
MBRD835L
1
8A Schottky Diode
L1
Any
Optional
1.3µH, 10A Inductor
DCR ~ 6m
See Note 1.
L2
Coiltronics
HC2-1R0
1
1.0µH, 34A Inductor
DCR ~ 1m
Q1
Fairchild
FDD6690A
2
N-Channel MOSFET
RDS(ON) = 17mΩ @ VGS = 4.5V
See Note 2.
Q2
Fairchild
FDD6680A
2
N-Channel MOSFET
RDS(ON) = 13mΩ @ VGS = 4.5V
See Note 2.
Q3-5
Fairchild
NDB4032L
3
N-Channel MOSFET
R1
Any
1
10
R2-3, R6
Any
3
4.7
R4, R8-12
Any
6
10K
R5
Any
1
27.4K
R7
Any
1
8.66K
U1
Fairchild
FAN5071M
1
DC/DC Controller
Test Parameters
Figure 2. Output Drive Timing Diagram
tR
90%
tDT
tDT
tF
HIDRV
LODRV
2V
2V
2V
90%
10%
10%
2V


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