參數(shù)資料
型號(hào)： LM2671N-ADJ
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator with Features
中文描述： 1.25 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDIP8
封裝： 0.300 INCH, PLASTIC, DIP-8
文件頁(yè)數(shù)： 13/26頁(yè)
文件大小： 972K
代理商： LM2671N-ADJ
LM2671 Series Buck Regulator Design Procedure (Fixed Output)
(Continued)
PROCEDURE (Fixed Output Voltage Version)
7. Frequency Synchronization (optional)
The LM2671 (oscillator) can be synchronized to run with an
external oscillator, using the sync pin (pin 3). By doing so, the
LM2671 can be operated at higher frequencies than the
standard frequency of 260 kHz. This allows for a reduction in
the size of the inductor and output capacitor.
As shown in the drawing below, a signal applied to a RC filter at
the sync pin causes the device to synchronize to the frequency
of that signal. For a signal with a peak-to-peak amplitude of 3V
or greater, a 1 k
resistor and a 100 pF capacitor are suitable
values.
EXAMPLE (Fixed Output Voltage Version)
7. Frequency Synchronization (optional)
For all applications, use a 1 k
resistor and a 100 pF capacitor
for the RC filter.
INDUCTOR VALUE SELECTION GUIDES
(For Continuous Mode Operation)
10004229
FIGURE 4. LM2671-3.3
10004230
FIGURE 5. LM2671-5.0
10004231
FIGURE 6. LM2671-12
10004232
FIGURE 7. LM2671-ADJ
L
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13
相關(guān)PDF資料
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LM2671MX-5.0 SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator with Features
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2671N-ADJ/NOPB 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 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
LM2672 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
LM2672_01 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SIMPLE SWITCHER㈢ Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
LM2672_07 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SIMPLE SWITCHER㈢ Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
LM2672EP 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Enhanced Plastic SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
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