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參數資料
| 型號： | FAN5094 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Multi-Phase Interleaved Buck Converter |
| 中文描述： | 多相交錯降壓轉換器 |
| 文件頁數： | 20/22頁 |
| 文件大小： | 182K |
| 代理商： | FAN5094 |
FAN5094
PRODUCT SPECIFICATION
20
REV. 1.0.2 5/13/02
PCB Layout Guidelines
Placement of the MOSFETs relative to the FAN5094 is
critical. Place the MOSFETs such that the trace length of
the HIDRV and LODRV pins of the FAN5094 to the FET
gates is minimized. A long lead length on these pins will
cause high amounts of ringing due to the inductance of the
trace and the gate capacitance of the FET. This noise
radiates throughout the board, and, because it is switching
at such a high voltage and frequency, it is very difficult to
suppress.
In general, all of the noisy switching lines should be kept
away from the quiet analog section of the FAN5094. That
is, traces that connect to pins 9-20 (LDRV, HDRV, GND
and BOOT) should be kept far away from the traces that
connect to pins 1 through 8, and pins 21-28.
Place the 0.1μF decoupling capacitors as close to the
FAN5094 pins as possible. Extra lead length on these
reduces their ability to suppress noise.
Each power and ground pin should have its own via to the
appropriate plane. This helps provide isolation between
pins.
Place the MOSFETs, inductor, and Schottky of a given
phase as close together as possible for the same reasons as
in the first bullet above. Place the input bulk capacitors as
close to the drains of the high side MOSFETs as possible.
In addition, placement of a 0.1
μ
F decoupling cap right on
the drain of each high side MOSFET helps to suppress
some of the high frequency switching noise on the input
of the DC-DC converter.
Place the output bulk capacitors as close to the CPU as
possible to optimize their ability to supply instantaneous
current to the load in the event of a current transient.
Additional space between the output capacitors and the
CPU will allow the parasitic resistance of the board traces
to degrade the DC-DC converter’s performance under
severe load transient conditions, causing higher voltage
deviation. For more detailed information regarding
capacitor placement, refer to Application Bulletin AB-5.
A PC Board Layout Checklist is available from Fairchild
Applications. Ask for Application Bulletin AB-11.
PC Motherboard Sample Layout and Gerber File
A reference design for motherboard implementation of the
FAN5094 along with the PCAD layout Gerber file and silk
screen can be obtained through your local Fairchild represen-
tative.
FAN5094 Evaluation Board
Fairchild provides an evaluation board to verify the system
level performance of the FAN5094. It serves as a guide to
performance expectations when using the supplied external
components and PCB layout. Please contact your local
Fairchild representative for an evaluation board.
Additional Information
For additional information contact your local Fairchild
representative.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN5094MTC | 功能描述:直流/直流開關轉換器 Buck Converter Hi Cur Sys Voltage RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| FAN5094MTC_Q | 功能描述:DC/DC 開關控制器 Buck Converter Hi Cur Sys Voltage RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| FAN5094MTCX | 功能描述:DC/DC 開關控制器 Buck Converter Hi Cur Sys Voltage RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| FAN5098 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Two Phase Interleaved Synchronous Buck Converter for AMD Hammer⑩ |
| FAN5098-BAB3116B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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