參數資料
型號: 21103
英文描述: AMD-K6 Processor Family Thermal Solutions Application Note AMD-K6 Processor Power Supply Design Application Note
中文描述: 的AMD - K6處理器系列散熱解決方案應用指南的AMD - K6處理器電源設計應用指南
文件頁數: 26/64頁
文件大小: 1056K
代理商: 21103
16
Decoupling and Layout Recommendations
AMD-K6
Processor Power Supply Design
21103G/0—February 1999
Figure 7. Bulk Decoupling versus Output Voltage Response for 3.2 V @10 A
Table 2 shows an error budget calculation for a 0.25-
μ
m
processor. The example uses seven, 470-
μ
F capacitors.
Figure 8 on page 17 shows the voltage drop as a function of bulk
decoupling for the 2.2V case. The graph was calculated using
55-m
ESR, 470
-
μ
F capacitors.
Output Voltage vs. Capacitance
2.4
2.5
2.6
2.7
2.8
2.9
3
3.1
3.2
470
940 1410 1880 2350 2820 3290 3760 4230 4700 5170 5640
Capacitance in micro Farads
V
Voltage
Table 2.
Voltage Error Budget for 0.25-Micron Processors (Models 7, 8, 9)
Error Budget
Component
V (Set Point)
Calculations*
Budgeted
Drop
0.022 V
1%
7.86
m
x 7.5A
(7.86 m
= 55m
/ 7)
0.2 nH x (7.5 A/10 nsec)
{0.2 nH = (0.7 nH + 0.7 nH via) / 7}
V(ESR)
0.059 V
V(ESL)
0.015 V
Total
Note:
0.096 V
*
Calculations assume 7 capacitors
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