參數(shù)資料
型號(hào)： LP2994
廠商： National Semiconductor Corporation
英文描述： DDR Termination Regulator
中文描述： DDR終端穩(wěn)壓器
文件頁(yè)數(shù)： 14/15頁(yè)
文件大?。?/td> 257K
代理商： LP2994
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
14
相關(guān)PDF資料
PDF描述
LP2994M DDR Termination Regulator
LP2994MX DDR Termination Regulator
LP2995LQX DDR Termination Regulator
LP2995MX DDR Termination Regulator
LP2995MR DDR Termination Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP2994EVAL 功能描述:其他開(kāi)發(fā)工具 LP2994 EVAL BOARD RoHS:否 制造商:Parallax 產(chǎn)品:ELEV-8 Hex Upgrade Kits 類(lèi)型:Robotics 工具用于評(píng)估:ELEV-8 Quadcopter 工作電源電壓:
LP2994M/NOPB 功能描述:IC DDR TERMINATION REG 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專(zhuān)用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(lèi)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)
LP2994M/NOPB 制造商:Texas Instruments 功能描述:Linear Voltage Regulator IC
LP2994MX/NOPB 功能描述:IC REGULATOR DDR TERM 8-SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專(zhuān)用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(lèi)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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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