【应用】适用于DDR内存总线终端电源的线性稳压器,具有良好的负载调整率和瞬态调整能力
在存储器中,对于位线较少的数据传输,通过传统无源总线终端电阻器(戴维南端接)将DDR传输线阻抗与电源阻抗匹配,从而降低成本( 如图1)。
图1、源总线终端线路图
当Q1导通时,Q2关断,电流通过电阻RS和RT从VDDQ流到VTT,此时VTT终端Sink电流,接收器输入电压 (Vin)高于Vref, Receiver实现数字信号“1”输入;当Q2导通时,Q1关断,电流从VTT通过RT和RS经Q2到地,VTT终端Source电流,此时Vin低Vref, Receiver实现数字信号“0”输入。
为了获取更快的数据传输率和保证数据传输的稳定,越来越多的工业、汽车、通信和便携式电子系统使用DDR存储器进行数据传输。在DDR存储器中,多个位线共享一个VTT电压。在DDR数据读写中,为了保证接收端数据读写准确,Vin必须大于或小于Vref电压125mV才能保证比较器的正确翻转。
以DDR4为例,假设共有50位线。此时传统的无源终端电阻器就要考虑功耗的问题,特别是在高位线与低位线不对称时,此时不得不降低RP电阻。一般Q1和Q2的导通阻抗几十欧姆(以20Ω为例),在 DDR4中,当高bit位多于低bit位时,VTT吸收电流,为了保证数据读写的准确,推算公式:
计算得出VTT电压不能小于0.428V。
以此DDR4为例,当全为低位时,为了保证VTT电压,此时RP电阻不能超过1Ω,将带来的0.92W的功耗,计算公式:
而因RP电阻就额外带来了0.78W的功耗,这将是无法接受的。
与无源端接相比,有源端接(图2)的优势是可以提供具有大电流输出能力的稳定VTT电压,这样可以从源头上避免无源终端因阻抗匹配问题造成读写数据错误,同时,由于Rp分压电阻的去除,可以大大提升系统效率。
图2
VTT是一个同时具有Sink和Source能力的有源终端,它的工作模式和无源端接一样,但是在Sink或者Source电流时,有源端接通过内部环路自动调整VTT电压,保证VTT电压始终等于 1/2*VDDQ。
思瑞浦推出的TPL51200是一款适用于DDR内存总线终端电源的高性能线性稳压器。
和一些DCDC解决方案比较,TPL51200减少了器件数量,节省了板子的空间和系统成本。只需较少的MLCC电容,在全温度范围内(-40℃~+85℃)拥有很好的负载调整率,如图3所示。
图3
同时TPL51200也具备很好的瞬态调整能力,如图4所示。
图4
TPL51200内置软启(如图5)、短路保护(如图6)、过流保护、过温保护等功能,还可以监视输出电压的PGOOD脚,帮助确认 VTT的建立,保证数据读写的准确性。
图5
图6
DDR终端电源芯片TPL51200能满足DDR、DDR2、DDR3、DDR3L、DDR4、LPDDR4等VTT总线终端电源的需求。
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本文由宝丁转载自思瑞浦,原文标题为:DDR终端电源芯片TPL51200应用笔记,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
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线性稳压器
型号- BD60FC0W,BD7673AG,BU90006GWZ,BAJ0CC0FP,BH6174GUL,BD81026MUV,BA18JC5T,BD52XXFVE SERIES,BD1CIC0WHFV,BD18KA5W,BM2P016-Z,BD53XXFVE SERIES,BD9106FVM,BD1CIC0W,BD3506F,BU43XXG SERIES,BH25RB1WGUT,BD18HA3WEFJ,BD7602GUL,BU27TA2WHFV,BD82001FVJ-LB,BAJ2CC0WT,BD52EXXG SERIES,BD15GA3W,BD12IC0MEFJ-LB,BD50FA1MG-M,BD9109FVM-LB,BD15HA5WEFJ,BU12SD2MG-M,BD433M2WFP3-C,BD90GC0MEFJ-LB,BA178M08CP,BAJ0BC0WFP,BD50HC5MEFJ-C,BA70BC0FP,BA90BC0T,BA90BC0W,BD00FC0WEFJ,BD70GA5MEFJ-LB,BD50HC5MEFJ-M,BM61M41RFV-C,BD9C301FJ,BU48XXF SERIES,BD15KA5WFP,BDJ2GA5MEFJ-M,BD30GA5MEFJ-M,BD15GC0MEFJ-LB,BA80BC0,BD00GA5MEFJ-LB,BD90C0AFPS,BD820F50EFJ-C,BD46EXX1G-M SERIES,BD80C0AWFP2-C,BD50GA3WNUX,BU26TD2WNVX,BD18HC0MEFJ-M,BD48XXFVE SERIES,BD71815AGW,BD2220G-LB,BU30TA2WNVX,BD71L4LG-1,BD80GA3MEFJ-M,BD30IC0W,BD95821MUV,BM2P139TF,BD81849MUV-C,BD33FC0FP,BA50JC5T,BD70HC0WEFJ,BD00GC0MEFJ-M,BD8158FVM,BD49XXFVE SERIES,BA25BC0WFP,BD3574YFP-M,BD50C0A,BD12IC0WEFJ,BD750L2,BD18HA3MEFJ-LB,BD70HA3WEFJ,BD15IC0W,BD53XXG-2M SERIES,BU32TD3WG,BD87A34FVM,BD30GA3W,BD9111NV,BM2P134Q-Z,BD6046GUL,BD47XXG SERIES,BD433M5WFP2-C,BA30BC0WT,BD50HA3MEFJ-LB,BD10KA5WFP,BA03CC0FP,BD9A100MUV,BD750L2FP3-C,BD3507HFV,BH28NB1WHFV,BH25NB1WHFV,BU27TA2WNVX,BUS1DJC0GWZ,BD433M5FP-C,BD15HC0WEFJ,BD18HC5MEFJ-M,BD33KA5W,BDJ5FC0W,BD25IA5MEFJ-M,BU15JA2VG-C,BD90GA3WEFJ,BD60FC0WEFJ,BAJ0BC0FP,BD2066FJ-LB,BD82001FVJ,BD450M2FP3-C,BD10IA5MEFJ-LB,BH32M0AWHFV,BA17805FP,BD18HC0WEFJ,BD90FC0WEFJ,BD8313HFN,BD9E302EFJ,BD15KA5FP,BD22621G-M,BD82065FVJ-LB,BD80GA3WNUX,BDJ2FC0WFP,BD10KA5WF,BH31NB1WHFV,BD2065AFJ,BD2066FJ,BD2201GUL,BU30TA2WHFV,BD7J200EFJ-LA,BD6529GUL,BD82039FVJ,BD9D322QWZ,BD18IA5MEFJ-M,BM2P151S-Z,BD30FC0WEFJ,BD45EXX1G-M SERIES,BD60HA5MEFJ-LB,BH29M0AWHFV,BD95514MUV,BA70BC0,BM1P061FJ,BD25KA5WF,BD70522GUL,BD9845FV,BU15TD3WG,BU1CJA2DG-C,BU18JA2DG-C,BD800M5WFP2-C,BD9S200MUF-C,BAJ2DD0WHFP,BD2068FJ-M,BM2P0391,BD33HA5MEFJ-LB,BD3573YFP-M,BD99954GW,BD9E151NUX,BU10JA2DG-C,BD9D320EFJ,BD9E303EFJ-LB,BA33BC0WFP,BM2P101E,BD25HA3MEFJ-M,BD52XXG-2M SERIES,BM1Q002FJ,BD37210AMUV,BD4271HFP-C,BD9327EFJ-LB,BD00HA5MEFJ-M,BA50DD0WT,BD90640EFJ-C,BD60GA3WEFJ,BU90090GWZ,BD30GA3MEFJ-LB,BD9701FP,BAJ5CC0T,BM1R00146F,BM1050AF,BD50HC5MEFJ-LB,BD15HC5MEFJ-M,BD25GA5MEFJ-LB,BD8311NUV,BH28RB1WGUT,BU2ATD2WNVX,BU18SA4WGWL,BM2P135TF,BU32TD2WNVX,BA09CC0FP,BA60JC5T,BD3539FVM,BM1R00147F,BD10IC0WHFV,BU12JA2MNVX-C,BD9B301MUV-LB,BU48XXFVE SERIES,BDJ2FC0WEFJ,BD33GA3W,BH18M0AWHFV,BAJ6DD0T,BD33C0AWFP2-C,BD9161FVM,BU49XXFVE SERIES,BA9741F,BAJ6DD0W,BD18KA5WF,BD9355MWV,BA17810FP,BD90C0AWFP-C,BM2P0361-Z,BDJ0GC0MEFJ-M,BD82040FVJ,BD8664GW,BA90BC0,BD15IC0WEFJ,BD9B100MUV,BM1R00148F,BM1C102F,BH33NB1WHFV,BD52XXG-2C SERIES,BD82029FVJ,BU34DV7NUY,BU1JTD2WNVX,BD42530EFJ-C,BA09CC0,BD9104FVM,BD33C0AW,BD50GC0MEFJ-LB,BD33KA5WF,BD33HC5WEFJ,BH27M0AWHFV,BD2206G-LB,BD12IA5WEFJ,BM1R00149F,BU2JTA2WNVX,BU15JA2MNVX-C,BH33RB1WGUT,BA178M10FP,BU46KXX2G SERIES,BU33DV7NUY,BM2SCQ124T-LBZ,BM1C101F,BD9S000NUX-C,BD90GA3MEFJ-LB,BU15SD2MG-M,BD70FC0W,BD00GA3WEFJ,BD2069FJ-M,BA33JC5T,BD60HA3MEFJ-M,BD8139AEFV,BD750L2FP-C,BD450M5WFP2-C,BD7F100HFN-LB,BD9P233MUF-C,BD9703FP,BD8317GWL,BD9035AEFV-C,BD95602MUV-LB,BM2P051F,BD60GC0MEFJ-LB,BD3508MUV,BD33GC0MEFJ-M,BU10TD2WNVX,BA178M10CP,BD00FC0W,BS2103F,BD18GA5WEFJ,BU15TD2WNVX,BA60BC0FP,BD70GC0WEFJ,BDJ2GC0WEFJ,BD450M5FP-C,BA07CC0WFP,BU30SA4WGWL,BA05CC0WT,BA17810CP,BA9743AFV,BA25JC5T,BD9C401EFJ,BU10JA2VG-C,BU25TA2WNVX,BA33DD0WT,BD18IA5MEFJ-LB,BH6062GW,BD30IC0MEFJ-LB,BD22641G-M,BD9B600MUV,BM2P052F,BD60GA3MEFJ-LB,BD18GC0MEFJ-LB,BU1CTD3WG,BD3021HFP,BM2P159PF,BD9611MUV,BD50HC5WEFJ,BD37A41FVM,BD82030FVJ,BD87A29FVM,BU2JTD3WG,BD15IC0MEFJ-LB,BA17812FP,BD33C0AFP2-C,BA90DD0WHFP,BD8166EFV,BM2P053F,BD33GC0MEFJ-LB,BD9874CP-V5,BD81842MUV-M,BS2101F,BU90008GWZ,BD49EXXG SERIES,BU21TD2WNVX,BD45EXX5G-M 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SERIES,BD6047AGUL,BD80FC0WEFJ,BD2266G-M,BU31TD2WNVX,BM2P181X-Z,BD00IA5MEFJ-LB,BM6101FV-C,BD80C0AFP-C,BM81110MUW,BD33IC0MEFJ-C,BD82020FVJ,BD7690FJ,BD50C0AHFP-C,BDJ0GA3MEFJ-M,BD7684FJ-LB,BD9S100NUX-C,BAJ0BC0,BA70BC0WT,BD8668GW,BU18SD2MG-M,BA08CC0FP,BD50C0AFP-C,BU25TD3WG,BA06CC0,BD70GA3MEFJ-LB,BD99950MUV,BM2P0151-Z,BD00GA5MEFJ-M,BD48EXXG SERIES,BM61S41RFV-C,BD90GA3MEFJ-M,BU30SA5WGWZ,BD9E100FJ-LB,BD33HA3MEFJ-LB,BU32TA2WHFV,BH30NB1WHFV,BD95601MUV-LB,BD87A28FVM,BD50GC0MEFJ-M,BH26M0AWHFV,BD50FC0WEFJ,BU2FSA4WGWL,BM1P067FJ,BD81010MUV,BD71L3SHFV,BD15HC5WEFJ,BD15HA3MEFJ-M,BD90302NUF-C,BU6652NUX,BD6528HFV,BD82032FVJ,BD00HC0MEF
思瑞浦(3PEAK)线性稳压与基准选型表
低压差、高PSRR,低功耗,低噪,最大输出电流(mA):150~3000,更有DDR端供电专用LDO,具有灌、拉电流能力。
产品型号
|
品类
|
Status
|
Rating
|
Package
|
Maximum Output Current(mA)
|
Iq(mA)
|
PSRR @1KHz (dB)
|
Dropout(mV)
|
Input Voltage(V)
|
Accuracy(max)
|
Noise(μVRMS)
|
TPL503133-S5TR
|
LVLDO
|
Production
|
Industrial
|
SOT23-5
|
300
|
0.055
|
70
|
250
|
1.5~5.5
|
±2%
|
178
|
选型表 - 思瑞浦 立即选型
TPL6305-S Low-Input, Low-Dropout, 3-A Linear Regulator with Enable Control
型号- TPL6305,TPL6305AD-ES1R-S,TPL6305-S
TPL740 Series 500 mA output, High PSRR, Low-Dropout Linear Regulator
型号- TPL740F25-89TR,TPL740F27-5TR,TPL740,TPL740F30-5TR,TPL740F28-89TR,TPL740F30-89TR,TPL740F27-FR,TPL740FXX-CR,TPL740F28-CR,TPL740F33-89TR,TPL740F25-FR,TPL740 SERIES,TPL740F12-CR,TPL740F28-5TR,TPL740F15-5TR,TPL740F29-FR,TPL740F29-89TR,TPL740F15-FR,TPL740ADJ-5TR,TPL740F18-5TR,TPL740F18-CR,TPL740F33-CR,TPL740F18-89TR,TPL740F30-FR,TPL740FXX-5TR,TPL740F18-FR,TPL740F33-5TR,TPL740F15-89TR,TPL740FXX-89TR,TPL740FXX-FR,TPL740F29-CR,TPL740F12-89TR,TPL740F28-FR,TPL740F27-CR,TPL740F25-CR,TPL740ADJ-CR,TPL740F33-FR,TPL740F27-89TR,TPL740F30-CR,TPL740F29-5TR,TPL740F12-FR,TPL740F12-5TR,TPL740F25-5TR,TPL740F15-CR
TPL730 Series 300 mA output, High PSRR, Low-Dropout Linear Regulator
型号- TPL730F25-FR,TPL730 SERIES,TPL730ADJ-5TR,TPL730F27-5TR,TPL730F29-FR,TPL730F27-FR,TPL730FXX-CR,TPL730F18-5TR,TPL730F28-CR,TPL730F15-5TR,TPL730F28-5TR,TPL730F18-CR,TPL730F30-FR,TPL730F15-FR,TPL730FXX-5TR,TPL730F12-CR,TPL730F33-CR,TPL730F33-5TR,TPL730F25-CR,TPL730F25-5TR,TPL730,TPL730FXX-FR,TPL730F29-5TR,TPL730F28-FR,TPL730F29-CR,TPL730F27-CR,TPL730ADJ-CR,TPL730F12-FR,TPL730F33-FR,TPL730F30-5TR,TPL730F12-5TR,TPL730F18-FR,TPL730F30-CR,TPL730F15-CR
【选型】思瑞浦DDR SDRAM存储器助力工控机,集成功率MOSFET,为DDR终端提供灌电流和源电流
某客户由于DDR电源设计中用到VTT电压,对电流要求比较大,且要求电源既能吸电流,也能灌电流,因此考虑采用专用的DDR电源芯片进行设计。本文推荐思瑞浦TPL51200-DF8R应用在工控机DDR电源电路。
TPL820 Series high performance and low dropout linear regulators
型号- TPL820U12-5TR,TPL820F33-3TR,TPL820U45-89TR,TPL820F33-5TR,TPL820F50-5TR,TPL820F25-89TR,TPL820F12,TPL820F25-3TR,TPL820F18,TPL810UXX-89TR,TPL820F33-89TR,TPL820U33,TPL820F25-5TR,TPL820U30,TPL820U28-89TR,TPL820F30-5TR,TPL820U45,TPL820F30-3TR,TPL820U30-89TR,TPL810FXX-ST4R,TPL820F30,TPL820F45-89TR,TPL810FXX-3TR,TPL820F25,TPL820F28-5TR,TPL820F50-89TR,TPL820F50-3TR,TPL820F28,TPL820F28-3TR,TPL820F18-89TR,TPL810FXX-5TR,TPL820F12-89TR,TPL820F18-ST4R,TPL820F45-5TR,TPL820F45-ST4R,TPL820U18-5TR,TPL820F45-3TR,TPL820F50-ST4R,TPL820U12,TPL820U18,TPL820,TPL820U25-5TR,TPL820F12-ST4R,TPL820F28-89TR,TPL820U25-89TR,TPL820F12-3TR,TPL820F33,TPL820F12-5TR,TPL820U50,TPL820F30-89TR,TPL820U50-5TR,TPL810FXX-89TR,TPL820U33-89TR,TPL820U33-5TR,TPL820U25,TPL820F18-3TR,TPL820F18-5TR,TPL810UXX-5TR,TPL820F28-ST4R,TPL820U28,TPL820U28-5TR,TPL820F50,TPL820F25-ST4R,TPL820F30-ST4R,TPL820U45-5TR,TPL820F33-ST4R,TPL820U30-5TR,TPL820F45,TPL820U18-89TR,TPL820U50-89TR,TPL820U12-89TR
TPL5031 Series 300-mA Output, High PSRR, Low-Dropout Linear Regulator
型号- TPL503109-S5TR,TPL503129-DF1R,TPL503109-DF1R,TPL5031092-S5TR,TPL503128-S5TR,TPL503115-DF1R,TPL503112-DF1R,TPL503118-DF1R,TPL503112-S5TR,TPL503115-S5TR,TPL503108-S5TR,TPL503121-DF1R,TPL503127-DF1R,TPL503108-DF1R,TPL5031XX-DF1R,TPL503127-S5TR,TPL5031,TPL503121-S5TR,TPL503130-DF1R,TPL5031XX-S5TR,TPL503136-DF1R,TPL503133-DF1R,TPL503110-DF1R,TPL503110-S5TR,TPL503118-S5TR,TPL5031092-DF1R,TPL5031075-S5TR,TPL503133-S5TR,TPL503130-S5TR,TPL503128-DF1R,TPL503136-S5TR,TPL5031 SERIES,TPL503125-DF1R,TPL503129-S5TR,TPL503125-S5TR,TPL503111-S5TR,TPL5031075-DF1R,TPL503111-DF1R
TPL8151-S 1.5-A Wide-Input High-Current Low-Dropout Linear Regulator
型号- TPL8151AD-DF9R-S,TPL8151-S,TPL8151
TPL810 Series high performance and low dropout linear regulators
型号- TPL810F30- 3TR,TPL810F18-89TR,TPL810F18,TPL810U33-89TR,TPL810F12,TPL810F12-89TR,TPL810U50-89TR,TPL810F37-5TR,TPL810U50-5TR,TPL810U33,TPL810U30,TPL810U33-5TR,TPL810F12-5TR,TPL810U37,TPL810UXX-89TR,TPL810U25-5TR,TPL810F30-5TR,TPL810F28,TPL810F12- 3TR,TPL810U45-5TR,TPL810ADJ,TPL810F18- 3TR,TPL810F25,TPL810F37- 3TR,TPL810ADJ-5TR,TPL810F18-5TR,TPL810U45,TPL810F50-89TR,TPL810U28-5TR,TPL810F45- 3TR,TPL810FXX-3TR,TPL810FXX-5TR,TPL810F37-89TR,TPL810F45-89TR,TPL810F30,TPL810F33,TPL810U25-89TR,TPL810U30-89TR,TPL810F37,TPL810U28-89TR,TPL810F25-5TR,TPL810F50-5TR,TPL810U12,TPL810U30-5TR,TPL810F50- 3TR,TPL810U50,TPL810F33-5TR,TPL810U18,TPL810FXX-89TR,TPL810U12-5TR,TPL810F45,TPL810UXX-5TR,TPL810F25-89TR,TPL810F33-89TR,TPL810U12-89TR,TPL810U37-5TR,TPL810,TPL810F28-89TR,TPL810U37-89TR,TPL810U18-89TR,TPL810U45-89TR,TPL810U28,TPL810F28-5TR,TPL810U25,TPL810F25- 3TR,TPL810U18-5TR,TPL810F28- 3TR,TPL810F30-89TR,TPL810F50,TPL810F45-5TR,TPL810F33- 3TR
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针对电子系统中的详细传热和流体流动模拟进行优化,可准确分析复杂的两相冷却组件(如热管/均热板),量化利用率,并警告是否干涸。
实验室地址: 深圳 提交需求>
可加工线路板层数:1~10层;最小孔径:0.2mm;孔径公差范围:±0.076mm(±3mil),板尺寸:5mm×5mm~600mm×600mm;板厚:0.2mm±0.08mm~2.0±0.1mm。
最小起订量: 1 提交需求>
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