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參數(shù)資料
| 型號(hào)： | LM3940LD-3.3/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 固定正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器 |
| 英文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, DSO8 |
| 封裝： | ROHS COMPLIANT, LLP-8 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 328K |
| 代理商： | LM3940LD-3.3/NOPB |
July 2007
LM3940
1A Low Dropout Regulator for 5V to 3.3V Conversion
General Description
The LM3940 is a 1A low dropout regulator designed to provide
3.3V from a 5V supply.
The LM3940 is ideally suited for systems which contain both
5V and 3.3V logic, with prime power provided from a 5V bus.
Because the LM3940 is a true low dropout regulator, it can
hold its 3.3V output in regulation with input voltages as low as
4.5V.
The T0-220 package of the LM3940 means that in most ap-
plications the full 1A of load current can be delivered without
using an additional heatsink.
The surface mount TO-263 package uses minimum board
space, and gives excellent power dissipation capability when
soldered to a copper plane on the PC board.
Features
■ Output voltage specified over temperature
■ Excellent load regulation
■ Guaranteed 1A output current
■ Requires only one external component
■ Built-in protection against excess temperature
■ Short circuit protected
Applications
■ Laptop/Desktop Computers
■ Logic Systems
Typical Application
1208001
*Required if regulator is located more than 1″ from the power supply filter capacitor or if battery power is used.
**See Application Hints.
Connection Diagram/Ordering Information
1208002
3-Lead TO-220 Package
(Front View)
Order Part Number LM3940IT-3.3
NSC Drawing Number TO3B
1208003
3-Lead TO-263 Package
(Front View)
Order Part Number LM3940IS-3.3
NSC Drawing Number TS3B
1208010
3-Lead SOT-223
(Front View)
Order Part Number LM3940IMP-3.3
Package Marked L52B
NSC Drawing Number MP04A
2007 National Semiconductor Corporation
12080
www.national.com
LM3940
1A
Low
Dropout
Regulator
for
5V
to
3.3V
Conversion
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3940LDX-3.3 | 功能描述:IC REG LDO 3.3V 1A 8-LLP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.1V 輸入電壓:最高 5.5V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:300mA 電流 - 限制（最?。?420mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 供應(yīng)商設(shè)備封裝:TSOT-23-5 包裝:帶卷 (TR) |
| LM3940N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1.25A High Current Low Dropout |
| LM3940S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1.25A High Current Low Dropout |
| LM3940T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1.25A High Current Low Dropout |
| LM3940WG-3.3-QML | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1A Low Dropout Regulator for 5V to 3.3V Conversion |
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