LM323K.pdf

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LM323
Three-terminal 3 A adjustable voltage regulators
Features
■
■
■
■
■
Output current: 3 A
Internal current and thermal limiting
Typical output impedance: 0.01 W
Minimum input voltage: 7.5 V
Power dissipation: 30 W
TO-3
TO-220
Description
The LM323 are three-terminal positive voltage
regulators with a preset 5 V output and a load
driving capability of 3 A. New circuit design and
processing techniques are used to provide the
high output current without sacrificing the
regulation characteristics of lower current devices.
The 3 A regulator is virtually blowout proof.
Current limiting, power limiting and thermal shut-
down provide the same high level of reliability
obtained with these techniques in the LM209, 1 A
regulator. An overall worst case specification for
the combined effects of input voltage, load
current, ambient temperature, and power
dissipation ensure that the LM323 will perform
satisfactorily as a system element.
Table 1.
Device summary
Order codes
Temperature range
TO-220
LM323T
TO-3
LM323K
Rev 4
0°C to 125°C
1/15
www.st.com
15
February 2008
Contents
LM323
Contents
1
2
3
4
5
6
7
8
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2/15
LM323
Diagram
1
Figure 1.
Diagram
Schematic diagram
3/15
Pin configuration
LM323
2
Figure 2.
Pin configuration
Pin connections (tot view)
TO-220
TO-3
4/15
LM323
Maximum ratings
3
Table 2.
Symbol
V
I
I
O
P
D
T
STG
T
OP
Maximum ratings
Absolute maximum ratings
Parameter
Input voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
Value
20
Internally limited
Internally limited
-65 to 150
0 to 125
°C
°C
Unit
V
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied
Thermal data
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
TO-220
3
50
TO-3
2
35
Unit
°C/W
°C/W
Table 3.
Symbol
R
thJC
R
thJA
5/15

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