參數(shù)資料
型號(hào): LM2674LDX-3.3
廠(chǎng)商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: SIMPLE SWITCHER Power Converter High Efficiency 500 mA Step-Down Voltage Regulator
中文描述: 1.25 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, DSO16
封裝: LLP-16
文件頁(yè)數(shù): 9/26頁(yè)
文件大?。?/td> 947K
代理商: LM2674LDX-3.3
Test Circuit and Layout Guidelines
10004122
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
10004123
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
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