參數(shù)資料
型號: LM2678SD-ADJ
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, DSO14
封裝: LLP-14
文件頁數(shù): 15/27頁
文件大?。?/td> 459K
代理商: LM2678SD-ADJ
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
相關(guān)PDF資料
PDF描述
LM2678S-12 IC LOGIC 125 LOW-VOLTAGE SINGLE FET 8-OHM BUS SWITCH -40+85C SOT-23-5 3000/REEL
LM2678S-3.3 3.0V, SOTiny, 0.4-Ohm Dual SPDT Analog Switch
LM2678S-5.0 3.0V, SOTiny, 0.8-Ohms Dual SPDT Analog Switch with -1.0V to 3.3V Operating Range
LM2678S-ADJ IC SW ANLG SPDT DUAL 12TDFN
LM2678SDX-5.0 3.3V 20-Bit Bus Switch
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2678SD-ADJ/HALF 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:
LM2678SD-ADJ/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)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(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
LM2678SD-ADJ/NOPB 制造商:Texas Instruments 功能描述:DC/DC Converter IC
LM2678SDX-12 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(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
LM2678SDX-12/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(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