Datasheet > LM342P-15

LM342P-15

更新时间： 2024-10-01 22:51:55

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美国国家半导体 - NSC		三端稳压器
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6页	127K
描述
3-Terminal Positive Regulators

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LM342P-15 数据手册

June 1989

LM342 Series

3-Terminal Positive Regulators

General Description

The LM342-XX series of three-terminal regulators is avail-

able with several fixed output voltages, making them useful

in a wide range of applications. One of these is local on card

regulation, eliminating the distribution problems associated

with single point regulation. The voltages available allow

these regulators to be used in logic systems, instrumenta-

tion, HiFi, and other solid state electronic equipment. Al-

though designed primarily as fixed voltage regulators these

devices can be used with external components to obtain

adjustable voltages and currents.

output, although this does improve transient response. Input

bypassing is needed only if the regulator is located far from

the filter capacitor of the power supply.

For output voltage other than 5V, 12V and 15V the LM117

series provides an output voltage range from 1.2V to 57V.

Features

Output current in excess of 0.25A

Internal thermal overload protection

No external components required

The LM342-XX series is available in the plastic TO-202

package. This package allows these regulators to deliver

over 0.25A if adequate heat sinking is provided. Current lim-

iting is included to limit the peak output current to a safe

value. Safe area protection for the output transistor is pro-

vided to limit internal power dissipation. If internal power

dissipation becomes too high for the heat sinking provided,

the thermal shutdown circuit takes over, preventing the IC

Output transistor safe area protection

Internal short circuit current limit

Available in plastic TO-202 package

Special circuitry allows start-up even if output is pulled

to negative voltage ( supplies)

Voltage Range

from overheating.

LM342-5.0

LM342-12 12V

LM342-15 15V

Considerable effort was expended to make the LM342-XX

series of regulators easy to use and minimize the number of

external components. It is not necessary to bypass the

Schematic Diagram

TL/H/10485–1

1995 National Semiconductor Corporation

TL/H/10485

RRD-B30M115/Printed in U. S. A.

12 3 4 5 6

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