LM123K/883 National Semiconductor, LM123K/883 Datasheet

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LM123K/883

Manufacturer Part Number
LM123K/883
Description
Standard Regulator Pos 5V 3A 3-Pin (2+Tab) TO-3 Tray
Manufacturer
National Semiconductor
Type
Linearr
Datasheet

Specifications of LM123K/883

Package
3TO-3
Function
Standard
Number Of Outputs
1
Input Voltage Range
20 to 7.5 V
Output Voltage
5 V
Maximum Output Current
3 A
Output Type
Fixed
Operating Temperature
-55 to 150 °C
Polarity
Positive
© 2010 National Semiconductor Corporation
3-Amp, 5-Volt Positive Regulator
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 charac-
teristics of lower current devices.
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 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 capacitance.
Ordering Information
Connection Diagram
NS Part Number
LM123K/883
SMD Part Number
201593
See NS Package Number K02C
Metal Can Package
LM123QML
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.
Features
NS Package Number
3 amp output current
Internal current and thermal limiting
0.01Ω typical output impedance
7.5V minimum input voltage
30W power dissipation
K02C
20159302
Package Description
2LD T0-3 Metal Can
December 16, 2010
www.national.com

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LM123K/883 Summary of contents

Page 1

... A 0.1 μF or larger capacitor may be used on the output to reduce load transient spikes created by fast switching digital logic swamp out stray load capacitance. Ordering Information NS Part Number LM123K/883 Connection Diagram © 2010 National Semiconductor Corporation LM123QML An overall worst case specification for the combined effects ...

Page 2

Schematic Diagram www.national.com 2 20159301 ...

Page 3

Absolute Maximum Ratings Input Voltage Power Dissipation (Note 2) Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) ESD Tolerance (Note 3) Quality Conformance Inspection Mil-Std-883, Method 5005 - Group A Subgroup ...

Page 4

Typical Performance Characteristics Maximum Average Power Dissipation for LM123 Peak Available Output Current Ripple Rejection www.national.com 20159309 Short Circuit Current 20159312 20159314 4 Output Impedance 20159311 20159313 Dropout Voltage 20159315 ...

Page 5

Line Transient Response 20159316 Quiescent Current 20159318 Output Noise Voltage 20159320 Output Voltage Load Transient Response 5 20159317 20159319 www.national.com ...

Page 6

Typical Applications *Select for 20 mA Current from Unregulated Negative Supply www.national.com 10 Amp Regulator with Complete Overload Protection 6 20159306 ...

Page 7

A —LM101A 1 —2 μF Optional—Improves Ripple Rejection, Noise, and Transient Response C 1 *Select to Set Output Voltage **Select to Draw 25 mA from V − Adjustable Regulator 0V−10V @ 3A Trimming Output to 5V Adjustable Output 5V−10V 0.1% ...

Page 8

LM123 is more than 4 from filter capacitor. †Regulator is stable with no load capacitor into resistive loads. www.national.com Basic 3 Amp Regulator 8 20159303 ...

Page 9

Revision History Section Released Revision 12/16/2010 A New Release, Corporate format Section 1 MDS data sheet converted into one Corp. data sheet format. The drift table was eliminated from the 883 section since it did not apply; MNLM123-X Rev 0BL ...

Page 10

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Metal Can Package (K) NS Package Number K02C 10 ...

Page 11

Notes 11 www.national.com ...

Page 12

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