參數(shù)資料
型號(hào)： LM10506TMX-A
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA34
封裝： 0.40 MM PITCH, MICRO SMD-34
文件頁(yè)數(shù)： 25/34頁(yè)
文件大?。?/td> 1020K
代理商： LM10506TMX-A
22.0 PCB Layout Considerations
PC board layout is an important part of DC-DC converter de-
sign. Poor board layout can disrupt the performance of a DC-
DC converter and surrounding circuitry by contributing to EMI,
ground bounce, and resistive voltage loss in the traces. These
can send erroneous signals to the DC-DC converter resulting
in poor regulation or instability. Good layout can be imple-
mented by following a few simple design rules.
30166225
FIGURE 8. Schematic of LM10506 Highlighting Layout Sensitive Nodes
1.
Minimize area of switched current loops. In a buck
regulator there are two loops where currents are
switched rapidly. The first loop starts from the C
IN input
capacitor, to the regulator SWx_VIN pin, to the regulator
SW pin, to the inductor then out to the output capacitor
C
OUT and load. The second loop starts from the output
capacitor ground, to the regulator SWx_GND pins, to the
inductor and then out to C
OUT and the load (see figure
above). To minimize both loop areas the input capacitor
should be placed as close as possible to the VIN pin.
Grounding for both the input and output capacitors
should consist of a small localized top side plane that
connects to PGND. The inductor should be placed as
close as possible to the SW pin and output capacitor.
2.
Minimize the copper area of the switch node. The SW
pins should be directly connected with a trace that runs
on top side directly to the inductor. To minimize IR losses
this trace should be as short as possible and with a
sufficient width. However, a trace that is wider than 100
mils will increase the copper area and cause too much
capacitive loading on the SW pin. The inductors should
be placed as close as possible to the SW pins to further
minimize the copper area of the switch node.
3.
Have a single point ground for all device analog grounds.
The ground connections for the feedback components
should be connected together then routed to the GND pin
of the device. This prevents any switched or load currents
from flowing in the analog ground plane. If not properly
handled, poor grounding can result in degraded load
regulation or erratic switching behavior.
4.
Minimize trace length to the FB pin. The feedback trace
should be routed away from the SW pin and inductor to
avoid contaminating the feedback signal with switch
noise.
5.
Make input and output bus connections as wide as
possible. This reduces any voltage drops on the input or
output of the converter and can improve efficiency. If
voltage accuracy at the load is important make sure
feedback voltage sense is made at the load. Doing so will
correct for voltage drops at the load and provide the best
output accuracy.
31
www.national.com
LM10506
相關(guān)PDF資料
PDF描述
LM122H/883 RECTANGULAR, TIMER, MBCY10
LM122H/883B RECTANGULAR, TIMER, MBCY10
LM12438CIWMX SPECIALTY ANALOG CIRCUIT, PDSO28
LM12434CIWMX SPECIALTY ANALOG CIRCUIT, PDSO28
LM12L438CIWMX SPECIALTY ANALOG CIRCUIT, PDSO28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM10506TMX-A/NOPB 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Triple Buck & LDO Power Mgmt Unit RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM10506TMX-C/NOPB 制造商:Texas Instruments 功能描述:LINEAR IC
LM10506TMXNOPB 制造商:Texas Instruments 功能描述:Power Management Unit 34-Pin Micro SMD T/R
LM10507TMX-A/NOPB 功能描述:Solid State Drives (SSD) PMIC 34-DSBGA (2.82x2.82) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 應(yīng)用:固態(tài)驅(qū)動(dòng)器（SSD） 電流 - 電源:50μA 電壓 - 電源:3 V ~ 5.5 V 工作溫度:-30°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:34-WFBGA，DSBGA 供應(yīng)商器件封裝:34-DSBGA（2.82x2.82） 標(biāo)準(zhǔn)包裝:1
LM10520 制造商:NSC 制造商全稱:National Semiconductor 功能描述:20A Adaptive Voltage Scaling (AVS) Evaluation Board
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*