參數(shù)資料
型號(hào)： LM2678SD-5.0
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 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(yè)數(shù)： 5/27頁(yè)
文件大小： 459K
代理商： LM2678SD-5.0
All Output Voltage Versions
Electrical Characteristics
(Continued)
Note 4:
All limits are guaranteed at room temperature (standard type face) and at
temperature extremes (bold type face)
. All room temperature limits are 100%
tested during production with T
A
= T
J
= 25C. All limits at temperature extremes are guaranteed via correlation using standard standard Quality Control (SQC)
methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
Note 5:
Junction to ambient thermal resistance (no external heat sink) for the 7 lead TO-220 package mounted vertically, with
1
2
inch leads in a socket, or on a PC
board with minimum copper area.
Note 6:
Junction to ambient thermal resistance (no external heat sink) for the 7 lead TO-220 package mounted vertically, with
1
2
inch leads soldered to a PC board
containing approximately 4 square inches of (1 oz.) copper area surrounding the leads.
Note 7:
Junction to ambient thermal resistance for the 7 lead TO-263 mounted horizontally against a PC board area of 0.136 square inches (the same size as the
TO-263 package) of 1 oz. (0.0014 in. thick) copper.
Note 8:
Junction to ambient thermal resistance for the 7 lead TO-263 mounted horizontally against a PC board area of 0.4896 square inches (3.6 times the area
of the TO-263 package) of 1 oz. (0.0014 in. thick) copper.
Note 9:
Junction to ambient thermal resistance for the 7 lead TO-263 mounted horizontally against a PC board copper area of 1.0064 square inches (7.4 times the
area of the TO-263 package) of 1 oz. (0.0014 in. thick) copper. Additional copper area will reduce thermal resistance further. See the thermal model in Switchers
Made Simple
software.
Note 10:
Junction to ambient thermal resistance for the 14-lead LLP mounted on a PC board copper area equal to the die attach paddle.
Note 11:
Junction to ambient thermal resistance for the 14-lead LLP mounted on a PC board copper area using 12 vias to a second layer of copper equal to die
attach paddle. Additional copper area will reduce thermal resistance further. For layout recommendations, refer to Application Note AN-1187.
L
www.national.com
5
相關(guān)PDF資料
PDF描述
LM2678SD-3.3 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
LM2678SD-12 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
LM2678-3.3 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
LM2678-5.0 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
LM2678-12 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2678SD-ADJ 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
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(kāi)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(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
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(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
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