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 1/15 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 2/15 LM323 Diagram 1 Diagram Figure 1. Schematic diagram 3/15 Pin configuration LM323 2 Pin configuration Figure 2. Pin connections (tot view) TO-220 4/15 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 5/15 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 %. 6/15 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 7/15 Typical characteristics Figure 9. Line transient response Figure 11. Quiescent current 8/15 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 13/15 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 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products 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 intellectual property rights is granted under this document. If 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. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately 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 liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2008 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 15/15