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參數資料
| 型號： | LM2670SX-5.0 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Voltage-Mode SMPS Controller |
| 中文描述： | 電壓模式開關電源控制器 |
| 文件頁數： | 13/25頁 |
| 文件大?。?/td> | 495K |
| 代理商： | LM2670SX-5.0 |
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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相關PDF資料 |
PDF描述 |
|---|---|
| LM2670SX-ADJ | Voltage-Mode SMPS Controller |
| LM2671 | |
| LM2672LDX-12 | |
| LM2672LDX-3.3 | |
| LM2672LDX-5.0 | |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2670SX-ADJ | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2670SX-ADJ/AULF | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM2670SX-ADJ/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2670SX-ADJEP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM2670EP Enhanced Plastic SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync |
| LM2670T-12 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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