Datasheet > 电源电路 > 线性稳压器IC> LM340-5.0MDA

LM340-5.0MDA

更新时间： 2024-09-26 22:51:55

品牌	Logo	应用领域
美国国家半导体 - NSC		线性稳压器IC 三端稳压器调节器电源电路输出元件
页数	文件大小	规格书
17页	920K
描述
3-Terminal Positive Regulators

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技术参数
数据手册

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LM340-5.0MDA 技术参数

生命周期：	Obsolete	包装说明：	DIE, DIE OR CHIP
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.65
Is Samacsys：	N	可调性：	FIXED
标称回动电压 1：	2 V	最大绝对输入电压：	35 V
最大输入电压：	25 V	最小输入电压：	7 V
JESD-30 代码：	X-XUUC-N	最大电网调整率：	0.05%
最大负载调整率：	0.05%	功能数量：	1
输出次数：	1	工作温度TJ-Max：	125 °C
工作温度TJ-Min：		最大输出电流 1：	1 A
最大输出电压 1：	5.25 V	最小输出电压 1：	4.75 V
标称输出电压 1：	5 V	封装主体材料：	UNSPECIFIED
封装代码：	DIE	封装等效代码：	DIE OR CHIP
封装形状：	UNSPECIFIED	封装形式：	UNCASED CHIP
认证状态：	Not Qualified	调节器类型：	FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR
子类别：	Other Regulators	表面贴装：	YES
技术：	BIPOLAR	端子形式：	NO LEAD
端子位置：	UPPER	最大电压容差：	5%
Base Number Matches：	1

LM340-5.0MDA 数据手册

November 2004

LM340/LM78XX Series

3-Terminal Positive Regulators

General Description

The 5V, 12V, and 15V regulator options are available in the

steel TO-3 power package. The LM340A/LM340/LM78XXC

series is available in the TO-220 plastic power package, and

the LM340-5.0 is available in the SOT-223 package, as well

as the LM340-5.0 and LM340-12 in the surface-mount TO-

263 package.

The

LM140/LM340A/LM340/LM78XXC

monolithic

3-terminal positive voltage regulators employ internal

current-limiting, thermal shutdown and safe-area compensa-

tion, making them essentially indestructible. If adequate heat

sinking is provided, they can deliver over 1.0A output cur-

rent. They are intended as fixed voltage regulators in a wide

range of applications including local (on-card) regulation for

elimination of noise and distribution problems associated

with single-point regulation. In addition to use as fixed volt-

age regulators, these devices can be used with external

components to obtain adjustable output voltages and cur-

rents.

Features

n Complete specifications at 1A load

n Output voltage tolerances of 2% at T_j= 25˚C and 4%

over the temperature range (LM340A)

n Line regulation of 0.01% of V_OUT/V of ∆V_INat 1A load

(LM340A)

n Load regulation of 0.3% of V_OUT/A (LM340A)

n Internal thermal overload protection

n Internal short-circuit current limit

n Output transistor safe area protection

n P⁺Product Enhancement tested

Considerable effort was expended to make the entire series

of regulators easy to use and minimize the number of exter-

nal components. It is not necessary to bypass the output,

although this does improve transient response. Input by-

passing is needed only if the regulator is located far from the

filter capacitor of the power supply.

Typical Applications

Fixed Output Regulator

Adjustable Output Regulator

00778102

00778101

= 5V + (5V/R1 + I ) R2 5V/R1 3 I ,

Q Q

OUT

*Required if the regulator is located far from the power supply filter.

load regulation (L ) ≈ [(R1 + R2)/R1] (L of LM340-5).

**Although no output capacitor is needed for stability, it does help transient

response. (If needed, use 0.1 µF, ceramic disc).

Comparison between SOT-223 and D-Pak (TO-252)

Packages

Current Regulator

00778103

00778138

Scale 1:1

∆I = 1.3 mA over line and load changes.

DS007781

www.national.com

12 3 4 5 6 7...17

中文翻译

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