Datasheet > LM7800C

LM7800C

更新时间： 2024-11-22 22:47:03

品牌	Logo	应用领域
美国国家半导体 - NSC		三端稳压器
页数	文件大小	规格书
15页	515K
描述
Series 3-Terminal Positive Regulators

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中文翻译

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LM7800C 数据手册

May 1999

LM140/LM340A/LM340/LM7800C

Series 3-Terminal Positive Regulators

General Description

Features

n Complete specifications at 1A load

The LM140/LM340A/LM340/LM7800C monolithic 3-terminal

positive voltage regulators employ internal current-limiting,

thermal shutdown and safe-area compensation, making

them essentially indestructible. If adequate heat sinking is

provided, they can deliver over 1.0A output current. They are

intended as fixed voltage regulators in a wide range of appli-

cations including local (on-card) regulation for elimination of

noise and distribution problems associated with single-point

regulation. In addition to use as fixed voltage regulators,

these devices can be used with external components to ob-

tain adjustable output voltages and currents.

n Output voltage tolerances of 2% at T_j25˚C and 4%

over the temperature range (LM140A/LM340A)

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

(LM140A/LM340A)

n Load regulation of 0.3% of V_OUT/A (LM140A/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, al-

though this does improve transient response. Input bypass-

ing is needed only if the regulator is located far from the filter

capacitor of the power supply.

Output

Device

LM140

Packages

Voltages

5, 12,

TO-3 (K)

LM340A/LM340 5, 12,

TO-3 (K), TO-220 (T),

SOT-223 (MP), TO-263 (S)

(5V and 12V only)

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

steel TO-3 power package. The LM340A/LM340/LM7800C

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.

LM7800C

5, 8, 12, TO-220 (T)

Typical Applications

Fixed Output Regulator

Adjustable Output Regulator

DS007781-1

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

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

DS007781-2

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

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

Q Q

OUT

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

Current Regulator

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

Packages

DS007781-3

DS007781-38

∆I = 1.3 mA over line and load changes.

Scale 1:1

DS007781

www.national.com

12 3 4 5 6 7...15

中文翻译

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与LM7800C相关器件

型号	品牌	获取价格	描述	数据表
LM7800-SMD	SEME-LAB	获取价格	POSITIVE VOLTAGE REGULATOR TO 220 M
LM7801-1A		获取价格	EffectIveness up to 96 %, output 1 A, switch mode 3 - D DC-DC Module
LM7802-1A		获取价格	EffectIveness up to 96 %, output 1 A, switch mode 3 - D DC-DC Module
LM7803-1A		获取价格	EffectIveness up to 96 %, output 1 A, switch mode 3 - D DC-DC Module
LM7805	TAITRON	获取价格	1A Standard Positive Voltage Regulator
LM7805	FAIRCHILD	获取价格	3-Terminal 1A Positive Voltage Regulator
LM7805	ISC	获取价格	Positive voltage regulators
LM7805	FCI	获取价格	LM7800 Series 3-Terminal fixed Voltage Regulators
LM7805	TGS	获取价格	3-Terminal 1A Positive Voltage Regulator
LM7805(TO-220F)	UTC	获取价格	Regulator, 1 Output, BIPolar,

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