This is information on a product in full production.
April 2014 DocID2165 Rev 5 1/16
LM323
Three-terminal 3 A adjustable voltage regulators
Datasheet
-
production data
Features
•Output current: 3 A
•Internal current and thermal limiting
•Typical output impedance: 0.01 Ω
•Minimum input voltage: 7.5 V
•Power dissipation: 30 W
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 with out sacrificing the
regulati on ch arac ter isti cs of low er curr e nt
devices.
The 3 A regulator is virtually blowout proof.
Current limiting, power limiting and thermal shut-
down provide high level of reliability. 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.
TO-220
Table 1. Device summary
TO-220 Temperature range
LM323T 0°C to 125°C
www.st.com
Contents LM323
2/16 DocID2165 Rev 5
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
DocID2165 Rev 5 3/16
LM323 Diagram
16
1 Diagram
Figure 1. Schematic diag ram
Pin configuration LM323
4/16 DocID2165 Rev 5
2 Pin configuration
Figure 2. Pin connections (t ot view)
TO-220
DocID2165 Rev 5 5/16
LM323 Maximum ratings
16
3 Maximum ratings
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
I
Input voltage 20 V
I
O
Output current Internally limited
P
D
Power dissipation Internally limited
T
STG
Storage temperature range -65 to 150 °C
T
OP
Operating junction temperature range 0 to 125 °C
Table 3. Thermal data
Symbol Parameter Value Unit
R
thJC
Thermal resistance junction-case 3 °C/W
R
thJA
Thermal resistance junction-ambient 50 °C/W
Ele ctrical characteristics LM323
6/16 DocID2165 Rev 5
4 Electrical characteristics
Table 4. Electric al char acteristi cs (T
J
= 0 to 125 °C, un less otherwise specif ied
(1)
)
1. Although power dissipation is internally limited, specifications apply only for P ≤ 30 W.
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
Output voltage range T
J
= 25°C, V
I
= 7.5 V, I
O
= 0 4.8 5 5.2 V
V
O
Output voltage range T
J
= T
min
to T
max
, P ≤ P
max
V
I
= 7.5 to 15 V, I
O
= 0 to 3 A 4.75 5.25 V
K
VI
Line regulation
(2)
2. Load and line regulation are specified at constant junction temperature. Pulse testing is required with a pulse width ≤ 1 ms
and duty cycle ≤ 5 %.
V
I
= 7.5 to 15 V, T
J
= 25°C 5 25 mV
K
VO
Load regulation
(2)
I
O
= 0 to 3 A, V
I
= 7.5 V, T
J
= 25°C 25 100 mV
I
IB
Quiescent curren t V
I
= 7.5 to 15 V, I
O
= 0 to 3 A 12 20 mA
V
NO
Output noise voltage T
J
= 25°C, f = 10 Hz to 100 kHz 40 µV
RMS
I
OS
Short circuit current limit V
I
= 15 V, T
J
= 25°C 3 4.5 A
V
I
= 7.5 V, T
J
= 25°C 4 5
K
VH
Long term stability 35 mV
DocID2165 Rev 5 7/16
LM323 Typi cal chara ct er istics
16
5 Typical characteristics
Figure 3. Output noise voltage Figure 4. Output impedance
Figure 5. Peak available output current Figure 6. Short circuit current
Typical characteristics LM323
8/16 DocID2165 Rev 5
Figure 7. Ripple rejection Figure 8. Dropout voltage
Figure 9. Line transient response Figure 10. Output voltage
Figure 11. Quiescent current Figure 12. Load transient response
DocID2165 Rev 5 9/16
LM323 Typical application
16
6 Typical application
C
1
= Required if regulator is distant from filter capacitors.
C
L
= Regulator is stable with no load capacitor into resistive loads.
Figure 13. Basic 3 A regulator
Figure 14. Trimming output to 5 V
Typical application LM323
10/16 DocID2165 Rev 5
* Selected for 20 mA current from unregulated negative supply.
** Solid tantalum.
A = LM201A, LM301A.
Figure 15. 10 A regulator with complete overload protection
DocID2165 Rev 5 11/16
LM323 Typical application
16
A1 = LM201A, LM301A.
C
I
= 2 µF optional - improves ripple rejection, noise and transient response.
Figure 16. Adjustable regulator 0 - 10 V / 3 A
Package mechanical data LM323
12/16 DocID2165 Rev 5
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
DocID2165 Rev 5 13/16
LM323 Package mechanical data
16
Figure 17. TO-220 drawing
BW\SH$B5HYB7
Package mechanical data LM323
14/16 DocID2165 Rev 5
Table 5. TO-220 mechanical data
Dim. mm
Min. Typ. Max.
A 4.40 4.60
b 0.61 0.88
b1 1.14 1.70
c 0.48 0.70
D 15.25 15.75
D1 1.27
E 10 10.40
e 2.40 2.70
e1 4.95 5.15
F 1.23 1.32
H1 6.20 6.60
J1 2.40 2.72
L13 14
L1 3.50 3.93
L20 16.40
L30 28.90
∅
P 3.75 3.85
Q 2.65 2.95
DocID2165 Rev 5 15/16
LM323 Revision history
16
8 Revision history
Table 6. Document revision history
Date Revision Changes
04-N ov-2005 3 Updated curves , no content change.
12-Feb-2008 4 Added: Table 1 on page 1.
09-Apr-2014 5
Removed TO-3 package.
Updated Section 2: Pin configuration, Section 3: Maximum ratings, Section 6:
Typical applic ation and Section 7: Package mechanical data.
Minor text changes.
LM323
16/16 DocID2165 Rev 5
Please Read Carefully:
Informa tion in this do cument is prov ided solely in connec tion with ST products. STMic roelect ronics NV and its subsidiari es (“ST”) reser ve the
right to mak e chang es, c or recti ons , modif ic ations or improv ement s, t o th is documen t, and the prod ucts an d servic es des crib ed he rein a t any
time, without notice.
All ST produ cts are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellect ual property rights is granted under this document. I f any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
ST PRODUCTS ARE NOT DESIGNED OR AUTHORIZED FOR USE IN: (A) SAFETY CRITICAL APPLICATIONS SUCH AS LIFE
SUPPORTING, ACTIVE IMPLANTED DEVICES OR SYSTEMS WITH PRODUCT FUNCTIONAL SAFETY REQUIREMENTS; (B)
AERONAUTIC APPLICATIONS; (C) AUTOMOTIVE APPLICATIONS OR ENVIRONMENTS, AND/OR (D) AEROSPACE APPLICATIONS
OR ENVIRONMENTS. WHERE ST PRODUCTS ARE NOT DESIGNED FOR SUCH USE, THE PURCHASER SHALL USE PRODUCTS AT
PURCHASER’S SOLE RISK, EVEN IF ST HAS BEEN INFORMED IN WRITING OF SUCH USAGE, UNLESS A PRODUCT IS
EXPRESSLY DESIGNATED BY ST AS BEING INTENDED FOR “AUTOMOTIVE, AUTOMOTIVE SAFETY OR MEDICAL” INDUSTRY
DOMAINS ACCORDING TO ST PRODUCT DESIGN SPECIFICATIONS. PRODUCTS FORMALLY ESCC, QML OR JAN QUALIFIED ARE
DEEMED SUITABLE FOR USE IN AEROSPACE BY THE CORRESPONDING GOVERNMENTAL AGENCY.
Resale of ST produ cts with provis ions different f rom the statement s and/or technic al features set forth in this document shall i mmediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liabili ty of ST.
ST and the ST logo are trade marks or registered trademarks of ST in various countries.
Information in this document supersedes and re places all informati on previously supplie d.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2014 STMicroelec tronics - All rights rese rved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
