LM123K

LM123/LM223 LM323 THREE-TERMINAL 3A-5V POSITIVE VOLTAGE REGULATORS ■ ■ ■ ■ ■ OUTPUT CURRENT: 3A INTERNAL CURRENT AND THERMAL LIMITING TYPICAL OUTPUT IMPEDANCE: 0.01Ω MINIMUM INPUT VOLTAGE: 7.5V POWER DISSIPATION: 30W DESCRIPTION The LM123, LM223, LM323 are three-terminal positive voltage regulators with a preset 5V output and a load driving capability of 3A. New circuit design and processing techniques are used to provide the high output current without sacrificing the regulation characteristics of lower current devices. The 3A 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, 1A regulator. An overall worst case specification for the combined effects of input voltage, load current, ambient temperature, and power TO-220 TO-3 dissipation ensure that the LM123, LM223, LM323 will perform satisfactorily as a system element. SCHEMATIC DIAGRAM November 2005 Rev. 3 1/11 LM123-LM223-LM323 Table 1: Absolute Maximum Ratings Symbol Parameter VI Input Voltage IO Value Unit 20 V Output Current Internally Limited Ptot Power Dissipation Internally Limited Tstg Storage Temperature Range Operating Junction Temperature Range LM123 LM223 LM323 Toper -65 to 150 °C -55 to 150 -25 to 125 0 to 125 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 2: Thermal Data Symbol Parameter TO-220 Rthj-case Thermal Resistance Junction-case Max Rthj-amb Thermal Resistance Junction-ambient Max TO-3 Unit 3 2 °C/W 50 35 °C/W Figure 1: Connection Diagram (top view) TO-220 TO-3 Table 3: Order Codes TYPE LM123 LM223 LM323 2/11 TO-220 TO-3 TEMPERATURE RANGE LM323T LM123K LM223K LM323K -55°C to 150°C -25°C to 150°C 0°C to 125°C LM123-LM223-LM323 Table 4: Electrical Characteristics Of LM123/LM223 (TJ = -55 to 150°C for LM123, TJ = -25 to 150°C for LM223 unless otherwise specified). Symbol VO VO Parameter Output Voltage Range (Note 2) Output Voltage Range (Note 2) Test Conditions Min. Typ. Max. Unit IO = 0 4.7 5 5.3 V P ≤ Pmax IO = 0 to 3 A 4.6 5.4 V Ta = 25°C, VI = 7.5 V, TJ = Tmin to Tmax VI = 7.5 to 15 V KVI Line Regulation (Note 3) VI = 7.5 to 15 V TJ = 25°C 5 25 mV KVO Load Regulation (Note 3) IO = 0 to 3 AVI = 7.5 V TJ = 25°C 25 100 mV 12 20 Quiescent Current VI = 7.5 to 15 V VNO Output Noise Voltage Ta = 25°C f = 10 Hz to 100 KHz 40 IOS Short Circuit Current Limit VI = 15 V TJ = 25°C 3 4.5 VI = 7.5 V TJ = 25°C 4 5 IIB KVH IO = 0 to 3 A Long Term Stability mA µVrms 35 A mV Notes: 1. Although power dissipation is internally limited, specifications apply only for P ≤ 30W. 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 ≤ 1ms and duty cycle ≤ 5%. Table 5: Electrical Characteristics Of LM323 (TJ = 0 to 150°C, unless otherwise specified). Symbol VO Parameter Test Conditions Output Voltage Range (Note 2) Output Voltage Range (Note 2) TJ = Tmin to Tmax VI = 7.5 to 15 V KVI Line Regulation (Note 3) VI = 7.5 to 15 V KVO Load Regulation (Note 3) IO = 0 to 3 AVI = 7.5 V Quiescent Current VI = 7.5 to 15 V VO IIB Ta = 25°C, VI = 7.5 V, IO = 0 P ≤ Pmax IO = 0 to 3 A TJ = 25°C TJ = 25°C IO = 0 to 3 A Min. Typ. Max. Unit 4.8 5 5.2 V 5.25 V 5 25 mV 25 100 mV 12 20 mA 4.75 VNO Output Noise Voltage Ta = 25°C f = 10 Hz to 100 KHz 40 IOS Short Circuit Current Limit VI = 15 V TJ = 25°C 3 VI = 7.5 V TJ = 25°C 4 KVH Long Term Stability µVrms 4.5 A 5 35 mV Notes: 1. Although power dissipation is internally limited, specifications apply only for P ≤ 30W. 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 ≤ 1ms and duty cycle ≤ 5%. 3/11 LM123-LM223-LM323 Figure 2: Output Noise Voltage Figure 5: Short Circuit Current Figure 3: Output Impedance Figure 6: Ripple Rejection Figure 4: Peak Available Output Current Figure 7: Dropout Voltage 4/11 LM123-LM223-LM323 Figure 8: Line Transient Response Figure 10: Quiescent Current Figure 9: Output Voltage Figure 11: Load Transient Response 5/11 LM123-LM223-LM323 TYPICAL APPLICATION Figure 12: Basic 3A Regulator C1 = Required if regulator is distant from filter capacitors. CL = Regulator is stable with no load capacitor into resistive loads. Figure 13: Trimming Output To 5V 6/11 LM123-LM223-LM323 Figure 14: 10A Regulator With Complete Overload Protection * Selected for 20 mA current from unregulated negative supply. ** Solid tantalum. A = LM101A, LM201A, LM301A. Figure 15: Adjustable Regulator 0 - 10V/3A A1 = LM101A, LM201A, LM301A. CI = 2µF optional - improves ripple rejection, noise and transient response. 7/11 LM123-LM223-LM323 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 8/11 LM123-LM223-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 D1 1.27 0.050 E 0.49 0.70 0.019 0.027 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 9/11 LM123-LM223-LM323 Table 6: Revision History Date Revision 04-Nov-2005 3 10/11 Description of Changes Updated curves, no content change. LM123-LM223-LM323 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners © 2005 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 11/11