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參數(shù)資料
| 型號： | LM2676 |
| 文件頁數(shù)： | 9/25頁 |
| 文件大小： | 495K |
| 代理商： | LM2676 |
Test Circuit and Layout Guidelines
10004222
C
IN
- 22 μF, 50V Tantalum, Sprague “199D Series”
C
OUT
- 47 μF, 25V Tantalum, Sprague “595D Series”
D1 - 3.3A, 50V Schottky Rectifier, IR 30WQ05F
L1 - 68 μH Sumida
#
RCR110D-680L
C
B
- 0.01 μF, 50V Ceramic
FIGURE 2. Standard Test Circuits and Layout Guides
Fixed Output Voltage Versions
10004223
C
IN
- 22 μF, 50V Tantalum, Sprague “199D Series”
C
OUT
- 47 μF, 25V Tantalum, Sprague “595D Series”
D1 - 3.3A, 50V Schottky Rectifier, IR 30WQ05F
L1 - 68 μH Sumida
#
RCR110D-680L
R1 - 1.5 k
, 1%
C
B
- 0.01 μF, 50V Ceramic
For a 5V output, select R2 to be 4.75 k
, 1%
where V
REF
= 1.21V
Use a 1% resistor for best stability.
FIGURE 3. Standard Test Circuits and Layout Guides
Adjustable Output Voltage Versions
L
www.national.com
9
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