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參數(shù)資料
| 型號： | LP2994MX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | DDR Termination Regulator |
| 中文描述： | BUS TERMINATOR SUPPORT CIRCUIT, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數(shù)： | 14/15頁 |
| 文件大?。?/td> | 257K |
| 代理商： | LP2994MX |
Typical Application Circuits
(Continued)
with the DDR-SDRAM DIMMs mounted on modules. As a
result bulk aluminum electrolytic capacitors in the range of
1000uF are typically used.
PCB Layout Considerations
1.
The input capacitor for the power rail should be placed
as close as possible to the PVIN pin.
2.
V
SENSE
should be connected to the V
TT
termination bus
at the point where regulation is required. For mother-
board applications an ideal location would be at the
center of the termination bus.
3.
V
can be connected remotely to the V
rail input
at either the DIMM or the Chipset. This provides the
most accurate point for creating the reference voltage.
4.
For improved thermal performance excessive top side
copper should be used to dissipate heat from the pack-
age. Numerous vias from the ground connection to the
internal ground plane will help. Additionally these can be
located underneath the package if manufacturing stan-
dards permit.
Care should be taken when routing the V
trace to
avoid noise pickup from switching I/O signals. A 0.1uF
ceramic capacitor located close to the V
can also
be used to filter any unwanted high frequency signal.
This can be an issue especially if long V
SENSE
traces are
used.
5.
L
www.national.com
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP2995LQX | DDR Termination Regulator |
| LP2995MX | DDR Termination Regulator |
| LP2995MR | DDR Termination Regulator |
| LP2995M | DDR Termination Regulator |
| LP2995LQ | DDR Termination Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2994MX/NOPB | 功能描述:IC REGULATOR DDR TERM 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| LP2995LQ | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2995LQ/7002047 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LP2995LQ/J7002047 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LP2995LQ/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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