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參數資料
| 型號： | LM3940J-3.3-QML |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, CDIP16 |
| 封裝： | CERAMIC, DIP-16 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 291K |
| 代理商： | LM3940J-3.3-QML |
LM3940
1A Low Dropout Regulator for 5V to 3.3V Conversion
General Description
The LM3940 is a 1A low dropout regulator designed to pro-
vide 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
n
Output voltage specified over temperature
n
Excellent load regulation
n
Guaranteed 1A output current
n
Requires only one external component
n
Built-in protection against excess temperature
n
Short circuit protected
Applications
n
Laptop/Desktop Computers
n
Logic Systems
Typical Application
DS012080-1
*
Required if regulator is located more than 1" from the power supply filter capacitor or if battery power is used.
**
See Application Hints.
May 1999
L
1999 National Semiconductor Corporation
DS012080
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM394BH | LM194/LM394 Supermatch Pair |
| LM394CH | LM194/LM394 Supermatch Pair |
| LM394CN | LM194/LM394 Supermatch Pair |
| LM394H | LM194/LM394 Supermatch Pair |
| LM394N | LM194/LM394 Supermatch Pair |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM3940LD-3.3/NOPB | 功能描述:IC REG LDO 3.3V 1A 8-LLP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3.1V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:- 穩(wěn)壓器數量:1 電流 - 輸出:300mA 電流 - 限制（最小）:420mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 供應商設備封裝:TSOT-23-5 包裝:帶卷 (TR) |
| 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:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3.1V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:- 穩(wěn)壓器數量: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 細型，TSOT-23-5 供應商設備封裝: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 |
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