LM340, A

Series

SEMICONDUCTOR

TECHNICAL DATA

THREE–TERMINAL

POSITIVE FIXED

VOLTAGE REGULATORS

Order this document by LM340/D

Pin 1. Input

2. Ground

3. Output

T SUFFIX

PLASTIC PACKAGE

CASE 221A

Heatsink surface is connected to Pin 2.

3

1

2

Simplified Application

A common ground is required between the input and

the output voltages. The input voltage must remain

typically 1.7 V above the output voltage even during

the low point on the input ripple voltage.

XX these two digits of the type number indicate

voltage.

*Cin is required if regulator is located an

appreciable distance from power supply filter.

** CO is not needed for stability; however, it does

improve transient response. If needed, use a

0.1

µF ceramic disc.

LM340–XX

Input

Cin*

0.33

µF

CO**

Output

1

MOTOROLA ANALOG IC DEVICE DATA

Three-Terminal Positive

Fixed Voltage Regulators

This family of fixed voltage regulators are monolithic integrated circuits

capable of driving loads in excess of 1.0 A. These three–terminal regulators

employ internal current limiting, thermal shutdown, and safe–area

compensation. Devices are available with improved specifications, including

a 2% output voltage tolerance, on A–suffix 5.0, 12 and 15 V device types.

Although designed primarily as a fixed voltage regulator, these devices

can be used with external components to obtain adjustable voltages and

currents. This series of devices can be used with a series–pass transistor to

boost output current capability at the nominal output voltage.

ORDERING INFORMATION

Device

Output Voltage

and Tolerance

Operating

Temperature Range

Package

LM340T–5.0

5.0 V

± 4%

T

0

12

C

Pl

i P

LM340AT–5.0

5.0 V

± 2%

T

0

12

C

Pl

i P

LM340T–6.0

6.0 V

± 4%

T

0

12

C

Pl

i P

LM340T–8.0

8.0 V

± 4%

T

0

12

C

Pl

i P

LM340T–12

12 V

± 4%

TJ =0° to +125°C

Plastic Power

LM340AT–12

12 V

± 2%

TJ = 0° to +125°C

Plastic Power

LM340T–15

15 V

± 4%

LM340AT–15

15 V

± 2%

LM340T–18

18 V

± 4%

LM340T–24

24 V

± 4%

* 2% regulators are available in 5, 12 and 15 V devices.

© Motorola, Inc. 1996

Rev 1