3-Amp, 5-Volt Positive Regulator

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 ?F solid tantalum capacitor should be used on the input. A 0.1 ?F 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.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM123K/883 Texas Instruments Military Grade 3A 5V Output Linear Regulator / LDO 2-TO -55 to 150
LM123 's PackagesLM123 's pdf datasheet
LM123K-883 TO-3




LM123 Pinout, Pinouts
LM123 pinout,Pin out
This is one package pinout of LM123,If you need more pinouts please download LM123's pdf datasheet.

LM123 Application circuits
LM123 circuits
This is one application circuit of LM123,If you need more circuits,please download LM123's pdf datasheet.


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