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 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 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 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 VI IO PD TSTG TOP 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 RthJC RthJA 5/15 Electrical characteristics LM323 4 Table 4. Symbol VO VO KVI KVO IIB VNO IOS KVH Electrical characteristics Electrical characteristics (TJ = 0 to 150 °C, unless otherwise specified (1)) Parameter Output voltage rang (2) Output voltage range (2) Line regulation (3) Load regulation (Note 3) Quiescent current Output noise voltage Short circuit current limit Long term stability Test conditions TJ = 25°C, VI = 7.5 V, IO = 0 TJ = Tmin to Tmax, P ≤Pmax VI = 7.5 to 15 V, IO = 0 to 3 A VI = 7.5 to 15 V, TJ = 25°C IO = 0 to 3 A, VI = 7.5 V, TJ = 25°C VI = 7.5 to 15 V, IO = 0 to 3 A TJ = 25°C, f = 10 Hz to 100 kHz VI = 15 V, TJ = 25°C VI = 7.5 V, TJ = 25°C Min. 4.8 4.75 5 25 12 40 3 4 4.5 A 5 35 mV Typ. 5 Max. 5.2 5.25 25 100 20 Unit V V mV mV mA µVRMS 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 Figure 3. Typical characteristics 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 LM323 Figure 9. Line transient response Figure 10. Output voltage Figure 11. Quiescent current Figure 12. Load transient response 8/15 LM323 Typical application 6 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 LM323 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 Package mechanical data 7 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. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147 mm. Min. 4.40 1.23 2.40 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 0.645 0.551 0.116 0.620 0.260 0.154 0.151 Typ. Max. 4.60 1.32 2.72 Min. 0.173 0.048 0.094 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 inch. Typ. Max. 0.181 0.051 0.107 P011C 12/15 LM323 Package mechanical data TO-3 mechanical data Dim. A B C D E G N P R U V 30.10 3.88 10.9 16.9 26.2 4.09 39.5 1.185 0.152 0.96 mm. Min. Typ. 11.85 1.05 1.10 1.70 8.7 20.0 0.429 0.665 1.031 0.161 1.555 0.037 Max. Min. inch. Typ. 0.466 0.041 0.043 0.066 0.342 0.787 Max. P G A D C U V O N R P003C/C B E 13/15 Revision history LM323 8 Table 5. Date Revision history Document revision history Revision 3 4 Changes Updated curves, no content change. Added: Table 1 on page 1. 04-Nov-2005 12-Feb-2008 14/15 LM323 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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