LM123 National Semiconductor, LM123 Datasheet

LM123

Manufacturer Part Number

LM123

Description

3-Amp/ 5-Volt Positive Regulator

Manufacturer

National Semiconductor

Datasheet

1.LM123.pdf (8 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM1233M-TLM-E

Manufacturer:

SANYO/三洋

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM1236

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM12360DEM

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM1236DEH/NA

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM1236DEI/NA

Manufacturer:

Quantity:

8 132

Company:

BOSTOCK HK LIMITED

Part Number:

LM1236DEM/NA

Manufacturer:

Quantity:

1 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM1236DEM/NA

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM1236DMA/NA

Manufacturer:

LATTICE

Quantity:

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM1237AAE/NA

Manufacturer:

Quantity:

6 266

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM1237AAE/NAES

Manufacturer:

MIT

Quantity:

6 237

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM1237AAF/NA

Manufacturer:

Quantity:

1 050

Company:

BOSTOCK HK LIMITED

Part Number:

LM1237BDCB/NA

Manufacturer:

Quantity:

693

Company:

BOSTOCK HK LIMITED

Part Number:

LM1237BDCE/AN

Manufacturer:

Quantity:

1 000

Company:

BOSTOCK HK LIMITED

Part Number:

LM1237BDCE/NA

Manufacturer:

Quantity:

1 000

Current page: 1 of 8
Download datasheet (204Kb)

LM123/LM323A/LM323

3-Amp, 5-Volt Positive Regulator

General Description

The LM123 is a three-terminal positive regulator with a pre-

set 5V output and a load driving capability of 3 amps. New

circuit design and processing techniques are used to provide

the high output current without sacrificing the regulation

characteristics of lower current devices.

The LM323A offers improved precision over the standard

LM323. Parameters with tightened specifications include

output voltage tolerance, line regulation, and load regulation.

The 3 amp regulator is virtually blowout proof. Current limit-

ing, power limiting, and thermal shutdown provide the same

high level of reliability obtained with these techniques in the

LM109 1 amp regulator.

No external components are required for operation of the

LM123. If the device is more than 4 inches from the filter ca-

pacitor, however, a 1 µF solid tantalum capacitor should be

used on the input. A 0.1 µF or larger capacitor may be used

on the output to reduce load transient spikes created by fast

switching digital logic, or to swamp out stray load capaci-

tance.

Connection Diagram

Typical Applications

*Required if LM123 is more than 4" from filter capacitor.

†

Regulator is stable with no load capacitor into resistive loads.

Order Number LM123K STEEL, LM323AK STEEL or LM323K STEEL

DS007771

See NS Package Number K02A

See NS Package Number K02C

Order Number LM123K/883

Basic 3 Amp Regulator

Metal Can Package

An overall worst case specification for the combined effects

of input voltage, load currents, ambient temperature, and

power dissipation ensure that the LM123 will perform satis-

factorily as a system element.

For applications requiring other voltages, see LM150 series

adjustable regulator data sheet.

Operation is guaranteed over the junction temperature range

−55˚C to +150˚C for LM123, −40˚C to +125˚C for LM323A,

and 0˚C to +125˚C for LM323. A hermetic TO-3 package is

used for high reliability and low thermal resistance.

Features

n Guaranteed 1% initial accuracy (A version)

n 3 amp output current

n Internal current and thermal limiting

n 0.01

n 7.5V minimum input voltage

n 30W power dissipation

n P

Product Enhancement tested

DS007771-2

typical output impedance

DS007771-3

www.national.com

April 1998

Related parts for LM123

Related keywords

LM123 datasheet
LM123 data sheet
LM123 pdf datasheet
LM123 component
LM123 part
LM123 distributor
LM123 RoHS
LM123 datasheet download