Steren MC7812CT Bedienungsanleitung

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 Semiconductor Components Industries, LLC, 2002

April, 2002 – Rev. 10

1Publication Order Number:

MC7800/D

MC7800, MC7800A, LM340,

LM340A Series, NCV7805

1.0 A Positive Voltage

Regulators

These voltage regulators are monolithic integrated circuits designed

as fixed–voltage regulators for a wide variety of applications

including local, on–card regulation. These regulators employ internal

current limiting, thermal shutdown, and safe–area compensation. With

adequate heatsinking they can deliver output currents in excess of

1.0 A. Although designed primarily as a fixed voltage regulator, these

devices can be used with external components to obtain adjustable

voltages and currents.

•Output Current in Excess of 1.0 A

•No External Components Required

•Internal Thermal Overload Protection

•Internal Short Circuit Current Limiting

•Output Transistor Safe–Area Compensation

•Output Voltage Oered in 2% and 4% Tolerance

•Available in Surface Mount D2PAK, DPAK and Standard 3–Lead

Transistor Packages

MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)

RatingSymbol ValueUnit

Input Voltage(5.0 – 18 V)VI35 Vdc

Input Voltage(24 V)40

Power Dissipation

Case 221A (TO–220)

TA = 25°C PDInternally

Limited

W

Thermal Resistance, Junction–to–AmbientR

θJA 65 C/W°

Thermal Resistance, Junction–to–CaseR

θJC 5.0 C/W°

Case 936 (D2PAK)

TA = 25°C PDInternally

Limited

W

Thermal Resistance, Junction–to–AmbientR

θJA See

Figure

14

°C/W

Thermal Resistance, Junction–to–CaseR

θJA 5.0 C/W°

Case 369A (DPAK)

TA = 25°C PDInternally

Limited

W

Thermal Resistance, Junction–to–AmbientR

θJA 92 C/W°

Thermal Resistance, Junction–to–CaseR

θJC 5.0 C/W°

Storage Junction Temperature RangeT

stg –65 to

+150

°C

Operating Junction TemperatureT

J+150 C°

NOTE: ESD data available upon request.

TO–220

T SUFFIX

CASE 221A

1

D2PAK

D2T SUFFIX

CASE 936

2

3

See detailed ordering and shipping information in the package

dimensions section on page 16 of this data sheet.

ORDERING INFORMATION

Heatsink surface

connected to Pin 2.

Pin1. Input

2. Ground

3. Output

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

1

3

STANDARD APPLICATION

A common ground is required between the

input and the output voltages. The input voltage

must remain typically 2.0 V above the output

voltage even during the low point on the input

ripple voltage.

XX,

MC78XX

Input

Cin

*

0.33 FµCO**

Output

These two digits of the type number

indicate nominal voltage.

Cin is required if regulator is located an

appreciable distance from power supply

lter.

CO is not needed for stability; however,

it does improve transient response. Values

of less than 0.1 µF could cause instability.

*

**

See general marking information in the device marking

section on page 18 of this data sheet.

DEVICE MARKING INFORMATION

1

3

DPAK

DT SUFFIX

CASE 369A

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