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參數(shù)資料
| 型號： | LM2678T-3.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER?? High Efficiency 5A Step-Down Voltage Regulator |
| 中文描述： | 8.75 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PZFM7 |
| 封裝： | TO-220, 7 PIN |
| 文件頁數(shù)： | 15/27頁 |
| 文件大小： | 459K |
| 代理商： | LM2678T-3.3 |
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Application Hints
(Continued)
Step 5:
An input capacitor for this example will require at
least a 35V WV rating with an rms current rating of 1.75A
(1/2 Iout max). From Table 2 it can be seen that C12, a
33μF/35V capacitor from Sprague, has the highest voltage/
current rating of the surface mount components and that two
of these capacitor in parallel will be adquate.
Step 6:
From Table 5 a 5A or more Schottky diode must be
selected. For surface mount diodes with a margin of safety
on the voltage rating one of two diodes can be used:
MBRD1545CT
6TQ045S
Step 7:
A 0.01μF capacitor will be used for Cboost.
LLP PACKAGE DEVICES
The LM2678 is offered in the 14 lead LLP surface mount
package to allow for a significantly decreased footprint with
equivalent power dissipation compared to the TO-263. For
details on mounting and soldering specifications, refer to
Application Note AN-1187.
L
www.national.com
15
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PDF描述 |
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| LM2678T-5.0 | SIMPLE SWITCHER?? High Efficiency 5A Step-Down Voltage Regulator |
| LM2678T-ADJ | SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator |
| LM2678SD-5.0 | SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator |
| LM2678SD-3.3 | SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator |
| LM2678SD-12 | SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2678T-5.0 | 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 |
| LM2678T-5.0 | 制造商:Texas Instruments 功能描述:SWITCHING REG 5A 5.0V 2678 TO-220 |
| LM2678T-5.0/NOPB | 功能描述:直流/直流開關轉換器 HIGH EFF 5A STEP- DOWN VLTG REG 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 |
| LM2678TADJ | 制造商:Texas Instruments 功能描述: |
| LM2678T-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(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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