參數(shù)資料
型號: FAN5071M
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: Analog IC
中文描述: SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO24
封裝: SOIC-24
文件頁數(shù): 8/15頁
文件大小: 424K
代理商: FAN5071M
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
< 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.
Test Parameters
Reference
C1
Manufacturer Part #
AVX
TAJB475M010R5
Panasonic
ECU-V1C105ZFX
Panasonic
ECU-V1H104ZFX
Sanyo
6MV1000FA
Rubycon
16ZL1000M
Rubycon
6.3ZL1500M
Motorola
MBRD835L
Any
Quantity
1
Description
4.7μF, 10V Capacitor
Requirements/Comments
C2, C5
2
1μF, 16V Capacitor
C3-4,C6
3
100nF, 50V Capacitor
C7-9
3
1000μF, 6.3V
Electrolytic
1000μF, 16V
Electrolytic
1500μF, 6.3V
Electrolytic
8A Schottky Diode
C
IN
4
I
RMS
= 2.3A
C
OUT
8
ESR
23m
D1
1
L1
Optional
1.3μH, 10A Inductor
DCR ~ 6m
See Note 1.
DCR ~ 1m
L2
Coiltronics
HC2-1R0
Fairchild
FDD6690A
Fairchild
FDD6680A
Fairchild
NDB4032L
Any
Any
Any
Any
Any
Fairchild
FAN5071M
1
1.0μH, 34A Inductor
Q1
2
N-Channel MOSFET
R
DS(ON)
= 17m
@ V
GS
= 4.5V
See Note 2.
R
DS(ON)
= 13m
@ V
GS
= 4.5V
See Note 2.
Q2
2
N-Channel MOSFET
Q3-5
3
N-Channel MOSFET
R1
1
3
6
1
1
1
10
4.7
10K
27.4K
8.66K
DC/DC Controller
R2-3, R6
R4, R8-12
R5
R7
U1
Figure 2. Output Drive Timing Diagram
t
R
90%
t
DT
t
DT
t
F
HIDRV
LODRV
2V
2V
2V
90%
10%
10%
2V
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