STMICROELECTRONICS LM323K

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
Description
TO-3
TO-220
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 shutdown 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
February 2008
TO-220
TO-3
LM323T
LM323K
Rev 4
0°C to 125°C
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www.st.com
15
Contents
LM323
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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LM323
Diagram
1
Diagram
Figure 1.
Schematic diagram
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Pin configuration
LM323
2
Pin configuration
Figure 2.
Pin connections (tot view)
TO-220
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TO-3
LM323
Maximum ratings
3
Maximum ratings
Table 2.
Absolute maximum ratings
Symbol
Parameter
Value
Unit
20
V
VI
Input voltage
IO
Output current
Internally limited
PD
Power dissipation
Internally limited
TSTG
Storage temperature range
TOP
Operating junction temperature range
-65 to 150
°C
0 to 125
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied
Table 3.
Thermal data
Symbol
Parameter
TO-220
TO-3
Unit
RthJC
Thermal resistance junction-case
3
2
°C/W
RthJA
Thermal resistance junction-ambient
50
35
°C/W
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Electrical characteristics
LM323
4
Electrical characteristics
Table 4.
Electrical characteristics (TJ = 0 to 150 °C, unless otherwise specified (1))
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
5
5.2
V
5.25
V
VO
Output voltage rang (2)
TJ = 25°C, VI = 7.5 V, IO = 0
4.8
VO
Output voltage range (2)
TJ = Tmin to Tmax, P ≤Pmax
VI = 7.5 to 15 V, IO = 0 to 3 A
4.75
KVI
Line regulation (3)
VI = 7.5 to 15 V, TJ = 25°C
5
25
mV
KVO
Load regulation (Note 3)
IO = 0 to 3 A, VI = 7.5 V, TJ = 25°C
25
100
mV
Quiescent current
VI = 7.5 to 15 V, IO = 0 to 3 A
12
20
mA
VNO
Output noise voltage
TJ = 25°C, f = 10 Hz to 100 kHz
40
4.5
Short circuit current limit
VI = 15 V, TJ = 25°C
3
IOS
VI = 7.5 V, TJ = 25°C
4
5
KVH
Long term stability
IIB
µVRMS
A
35
mV
1. Although power dissipation is internally limited, specifications apply only for P ≤30 W.
2. Selected devices with tightened tolerance output voltage available.
3. Load and line regulation are specified at constant junction temperature. Pulse testing is required with a pulse width ≤1 ms
and duty cycle ≤5 %.
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LM323
Typical characteristics
5
Typical characteristics
Figure 3.
Output noise voltage
Figure 4.
Output impedance
Figure 5.
Peak available output current
Figure 6.
Short circuit current
Figure 7.
Ripple rejection
Figure 8.
Dropout voltage
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Typical characteristics
Figure 9.
Line transient response
Figure 11. Quiescent current
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LM323
Figure 10. Output voltage
Figure 12. Load transient response
LM323
6
Typical application
Typical application
Figure 13. Basic 3 A regulator
C1 = Required if regulator is distant from filter capacitors.
CL = Regulator is stable with no load capacitor into resistive loads.
Figure 14. Trimming output to 5 V
9/15
Typical application
Figure 15. 10 A regulator with complete overload protection
* Selected for 20 mA current from unregulated negative supply.
** Solid tantalum.
A = LM101A, LM201A, LM301A.
Figure 16. Adjustable regulator 0 - 10 V / 3 A
A1 = LM101A, LM201A, LM301A.
CI = 2 µF optional - improves ripple rejection, noise and transient response.
10/15
LM323
LM323
7
Package mechanical data
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
11/15
Package mechanical data
LM323
TO-220 mechanical data
Dim.
mm.
Min.
Typ.
inch.
Max.
Min.
Typ.
Max.
A
4.40
4.60
0.173
0.181
C
1.23
1.32
0.048
0.051
D
2.40
2.72
0.094
0.107
0.70
0.019
0.027
D1
E
1.27
0.49
0.050
F
0.61
0.88
0.024
0.034
F1
1.14
1.70
0.044
0.067
F2
1.14
1.70
0.044
0.067
G
4.95
5.15
0.194
0.203
G1
2.4
2.7
0.094
0.106
H2
10.0
10.40
0.393
0.409
L2
16.4
0.645
L4
13.0
14.0
0.511
0.551
L5
2.65
2.95
0.104
0.116
L6
15.25
15.75
0.600
0.620
L7
6.2
6.6
0.244
0.260
L9
3.5
3.93
0.137
0.154
DIA.
3.75
3.85
0.147
0.151
P011C
12/15
LM323
Package mechanical data
TO-3 mechanical data
mm.
Dim.
Min.
A
inch.
Typ.
Max.
Min.
Typ.
11.85
B
0.96
Max.
0.466
1.05
1.10
0.037
0.041
0.043
C
1.70
0.066
D
8.7
0.342
E
20.0
0.787
G
10.9
0.429
N
16.9
0.665
P
26.2
R
3.88
1.031
4.09
U
0.152
39.5
V
1.555
30.10
1.185
A
P
D
C
O
N
B
V
E
G
U
0.161
R
P003C/C
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Revision history
LM323
8
Revision history
Table 5.
Document revision history
Date
Revision
04-Nov-2005
3
Updated curves, no content change.
12-Feb-2008
4
Added: Table 1 on page 1.
14/15
Changes
LM323
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