- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371374 > 22495 Implementation of Write Allocate Application Note Mobile AMD-K6 Processor Power Supply Design Application Note PDF資料下載
參數(shù)資料
| 型號： | 22495 |
| 英文描述： | Implementation of Write Allocate Application Note Mobile AMD-K6 Processor Power Supply Design Application Note |
| 中文描述： | 在寫分配執(zhí)行情況的說明移動應(yīng)用的AMD - K6處理器電源設(shè)計應(yīng)用指南 |
| 文件頁數(shù)： | 36/50頁 |
| 文件大小： | 1087K |
| 代理商： | 22495 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁當(dāng)前第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁
26
Decoupling and Layout Recommendations
Mobile AMD-K6
Processor Power Supply Design
22495C/0—May 1999
inductances between the capacitor and the processor as shown
in Figure 15 on page 28. The dotted line shows that connecting
the capacitor directly to the processor eliminates two series
inductances. However, this trace also has inductance—if it is
too long or too narrow it can be worse than the vias.
Figure 14 on page 28 shows the effect of the inductance at
higher frequencies. (The numbers outside the X and Y axis
indicate the minimum and maximum values plotted). The
inductance used is 1.8nH (0.7nH for each of the two vias and
0.4nH for the capacitor itself). The capacitor is a 0.1-
μ
F X7R
multilayer Ceramic MLC. The inductance of a capacitor is a
function of the case type. An 0612 case is assumed here.
The following steps show how the number of required
capacitors is calculated:
1. Decide what to allow as a ripple voltage budget. In this
example calculation the ripple-voltage budget (dv) is 30 mV.
2. The measured AC transient current is 0.75A. This transient
current has a typical duration (dt) of 2.5 nsec. The amount
of capacitance required can now be determined using the
following equation:
I = C (dv/dt)
C = I (dt/dv) = 0.75A (2.5nsec/30mV) = 0.625
μ
F
This equation indicates that if the capacitors didn't have
inductance, only six 0.1-
μ
F capacitors would be required.
3. Determine the number of capacitors required based on the
inductance of the capacitor. Use the following formula:
V = L (di/dt) = L
(0.75A/2.5nsec) = 30mV
Solving for L, the allowed budget is 100pH.
4. The inductance of the capacitor and via = 1.8nH (0.7nH for
each of the two vias and 0.4nH from the capacitor itself).
Because each capacitor usually has two vias (one on each
end), the effective via inductance must be:
2
0.7nH + 0.4nH = 1.8nH
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 224CNQ | SCHOTTKY RECTIFIER |
| 224CNQ040 | Proximity Sensor; Sensor Input Type:Magnetic; Sensor Output Type:NPN; Leaded Process Compatible:No; Output Type:3 Wire; Peak Reflow Compatible (260 C):No; Sensor Housing:Barrel |
| 224CNQ045 | SCHOTTKY RECTIFIER |
| 224CNQ035 | SCHOTTKY RECTIFIER |
| 225.1 | Fuse |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 224951 | 制造商:Q-MAX 功能描述:CUTTER ROUND 76.5MM |
| 2249520 | 制造商: 功能描述: 制造商:OSM 功能描述: 制造商:undefined 功能描述: |
| 224953 | 制造商:Q-MAX 功能描述:CUTTER SQUARE 19.0MM |
| 224954 | 制造商:Q-MAX 功能描述:CUTTER SQUARE 25.4MM 制造商:Q-MAX 功能描述:CUTTER, SQUARE, 25.4MM |
| 224956 | 制造商:Q-MAX 功能描述:PUNCH METAL RECTANGULAR 17.5X24.0MM |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。