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參數(shù)資料
| 型號： | LM2672N-ADJ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features |
| 中文描述： | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 13/25頁 |
| 文件大小： | 895K |
| 代理商： | LM2672N-ADJ |
LM2672 Series Buck Regulator Design Procedure (Fixed Output)
(Continued)
PROCEDURE (Fixed Output Voltage Version)
EXAMPLE (Fixed Output Voltage Version)
where:
I
SS
t
SS
V
SSTH
V
OUT
V
SCHOTTKY
V
IN
= Input Voltage
If this feature is not desired, leave this pin open.
= Soft-Start Current
= Soft-Start Time
= Soft-Start Threshold Voltage
= Output Voltage
= Schottky Diode Voltage Drop
:Selected.
:4.5 μA typical.
:Selected.
:0.63V typical.
:Selected.
:0.4V typical.
7. Frequency Synchronization (optional)
The LM2672 (oscillator) can be synchronized to run with an
external oscillator, using the sync pin (pin 3). By doing so, the
LM2672 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.
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)
01293429
FIGURE 4. LM2672-3.3
01293430
FIGURE 5. LM2672-5.0
L
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相關PDF資料 |
PDF描述 |
|---|---|
| LM2672M-ADJ | SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features |
| LM2673S-12 | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
| LM2673S-3.3 | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
| LM2673S-5.0 | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
| LM2673S-ADJ | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2672N-ADJ | 制造商:Texas Instruments 功能描述:SWITCHING REG 1A ADJ 2672 DIP8 |
| LM2672N-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(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2673 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LM2673_08 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SIMPLE SWITCHER㈢ 3A Step-Down Voltage Regulator with Adjustable Current Limit |
| LM2673-5.0EVAL | 功能描述:電源管理IC開發(fā)工具 EVAL BOARDFOR LM2673 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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