LM323 - 3-Amp, 5-Volt Positive Regulator
Datasheet Packaging Samples & Pricing Application Notes Knowledge Base

Features
Guaranteed 1% initial accuracy (A version)
3 amp output current
Internal current and thermal limiting
0.01 Ohm typical output impedance
7.5V minimum input voltage
30W power dissipation
P+ Product Enhancement tested

General Description


The LM123 is a three-terminal positive regulator with a preset 5V output and a load driving capability of 3 amps. More...


  Typical Application
click for larger image


ParametersValues
Output Current 3000 mA
Output Voltage 5 Volt
Input Min Voltage 7.5 Volt
Input Max Voltage 20 Volt
Adjustable Output No
On/Off Pin No
Error Flag No
Temperature Min 0 deg C
Temperature Max 125 deg C
RegType Linear Regulator


Typical Performance


*click for larger image


  Additional Resources
Application Notes


Connection Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM123/LM323A/LM323 3-Amp, 5-Volt Positive Regulator 203
Kbytes
23-Jun-99 Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM323K STEELTO-32NOPB
STD
1
1
NA
NA
RoHS N/A Full productionN/A
 
Buy Now
1K+$22.00tray
of
50
NS
ZXYTTE#
LM323K
STEEL
6 weeks500
LM323 MWCWaferLifetime buyN/A
  CALLwafer jar
of
N/A
-
6 weeks2500

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM323AK STEEL
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008

General Description


The LM123 is a three-terminal positive regulator with a preset 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 limiting, 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 capacitor, 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 capacitance.

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 satisfactorily 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.

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[Information as of 8-Nov-2009]