LM723CN

LM723/LM723C Voltage Regulator June 1999 LM723/LM723C Voltage Regulator General Description The LM723/LM723C is a voltage regulator designed primarily for series regulator applications. By itself, it will supply output currents up to 150 mA; but external transistors can be added to provide any desired load current. The circuit features extremely low standby current drain, and provision is made for either linear or foldback current limiting. The LM723/LM723C is also useful in a wide range of other applications such as a shunt regulator, a current regulator or a temperature controller. The LM723C is identical to the LM723 except that the LM723C has its performance guaranteed over a 0˚C to +70˚C temperature range, instead of −55˚C to +125˚C. Features n 150 mA output current without external pass transistor n Output currents in excess of 10A possible by adding external transistors n Input voltage 40V max n Output voltage adjustable from 2V to 37V n Can be used as either a linear or a switching regulator Connection Diagrams Dual-In-Line Package Metal Can Package DS008563-2 DS008563-3 Top View Order Number LM723J/883 or LM723CN See NS Package J14A or N14A Note: Pin 5 connected to case. Top View Order Number LM723H, LM723H/883 or LM723CH See NS Package H10C © 1999 National Semiconductor Corporation DS008563 www.national.com Connection Diagrams (Continued) DS008563-20 Top View Order Number LM723E/883 See NS Package E20A Equivalent Circuit* DS008563-4 *Pin numbers refer to metal can package. Typical Application DS008563-8 for minimum temperature drift. Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 50 mA) 5V 0.5mV 1.5mV FIGURE 1. Basic Low Voltage Regulator (VOUT = 2 to 7 Volts) www.national.com 2 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 10) Pulse Voltage from V+ to V− (50 ms) Continuous Voltage from V+ to V− Input-Output Voltage Differential Maximum Amplifier Input Voltage (Either Input) Maximum Amplifier Input Voltage (Differential) Current from VZ Current from VREF Internal Power Dissipation Metal Can (Note 2) 50V 40V 40V 8.5V 5V 25 mA 15 mA 800 mW Cavity DIP (Note 2) 900 mW Molded DIP (Note 2) 660 mW Operating Temperature Range LM723 −55˚C to +150˚C LM723C 0˚C to +70˚C Storage Temperature Range Metal Can −65˚C to +150˚C Molded DIP −55˚C to +150˚C Lead Temperature (Soldering, 4 sec. max.) Hermetic Package 300˚C Plastic Package 260˚C ESD Tolerance 1200V (Human body model, 1.5 kΩ in series with 100 pF) Electrical Characteristics (Note 3) (Note 10) Parameter Line Regulation Conditions Min VIN = 12V to VIN = 15V −55˚C ≤ TA ≤ +125˚C 0˚C ≤ TA ≤ +70˚C VIN = 12V to VIN = 40V IL = 1 mA to IL = 50 mA −55˚C ≤ TA ≤ +125˚C Ripple Rejection Average Temperature Coefficient of Output Voltage (Note 8) Short Circuit Current Limit Reference Voltage Output Noise Voltage Long Term Stability Standby Current Drain Input Voltage Range Output Voltage Range Input-Output Voltage Differential θJA θJA θJA θJA θJC Molded DIP Cavity DIP H10C Board Mount in Still Air H10C Board Mount in 400 LF/Min Air Flow 150 165 66 22 165 66 22 IL = 0, VIN = 30V 9.5 2.0 3.0 BW = 100 Hz to 10 kHz, CREF = 0 BW = 100 Hz to 10 kHz, CREF = 5 µF 0˚C ≤ TA ≤ +70˚C f = 50 Hz to 10 kHz, CREF = 0 f = 50 Hz to 10 kHz, CREF = 5 µF −55˚C ≤ TA ≤ +125˚C 0˚C ≤ TA ≤ +70˚C RSC = 10Ω, VOUT = 0 74 86 0.002 0.015 0.003 0.015 65 6.95 7.15 86 2.5 0.05 1.7 3.5 40 37 38 9.5 2.0 3.0 105 65 7.35 6.80 7.15 86 2.5 0.05 1.7 4.0 40 37 38 7.50 0.02 0.03 LM723 Typ 0.01 Max Min 0.1 0.3 0.3 0.2 0.15 0.6 0.6 74 86 0.1 0.03 0.5 0.2 LM723C Typ 0.01 Max 0.1 % VOUT % VOUT % VOUT % VOUT % VOUT % VOUT % VOUT dB dB %/˚C %/˚C mA V µVrms µVrms %/1000 hrs mA V V V ˚C/W ˚C/W ˚C/W ˚C/W ˚C/W Units Load Regulation Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Note 2: See derating curves for maximum power rating above 25˚C. Note 3: Unless otherwise specified, TA = 25˚C, VIN = V+ = VC = 12V, V− = 0, VOUT = 5V, IL = 1 mA, RSC = 0, C1 = 100 pF, CREF = 0 and divider impedance as seen by error amplifier ≤ 10 kΩ connected as shown in Figure 1. Line and load regulation specifications are given for the condition of constant chip temperature. Temperature drifts must be taken into account separately for high dissipation conditions. Note 4: L1 is 40 turns of No. 20 enameled copper wire wound on Ferroxcube P36/22-3B7 pot core or equivalent with 0.009 in. air gap. Note 5: Figures in parentheses may be used if R1/R2 divider is placed on opposite input of error amp. Note 6: Replace R1/R2 in figures with divider shown in Figure 13. Note 7: V+ and VCC must be connected to a +3V or greater supply. Note 8: For metal can applications where VZ is required, an external 6.2V zener diode should be connected in series with VOUT. 3 www.national.com Electrical Characteristics (Note 3) (Note 10) Note 9: Guaranteed by correlation to other tests. (Continued) Note 10: A military RETS specification is available on request. At the time of printing, the LM723 RETS specification complied with the Min and Max limits in this table. The LM723E, H, and J may also be procured as a Standard Military Drawing. Typical Performance Characteristics Load Regulation Characteristics with Current Limiting Load Regulation Characteristics with Current Limiting Load & Line Regulation vs Input-Output Voltage Differential DS008563-22 DS008563-23 DS008563-24 Current Limiting Characteristics Current Limiting Characteristics vs Junction Temperature Standby Current Drain vs Input Voltage DS008563-25 DS008563-26 DS008563-27 Line Transient Response Load Transient Response Output Impedence vs Frequency DS008563-28 DS008563-29 DS008563-30 www.national.com 4 Maximum Power Ratings Noise vs Filter Capacitor (CREF in Circuit of Figure 1) (Bandwidth 100 Hz to 10 kHz) LM723 Power Dissipation vs Ambient Temperature LM723C Power Dissipation vs Ambient Temperature DS008563-31 DS008563-32 DS008563-33 TABLE 1. Resistor Values (kΩ) for Standard Output Voltage Positive Output Voltage (Note 5) +3.0 +3.6 +5.0 +6.0 +9.0 +12 +15 +28 +45 +75 1, 5, 6, 9, 12 (4) 1, 5, 6, 9, 12 (4) 1, 5, 6, 9, 12 (4) 1, 5, 6, 9, 12 (4) 2, 4, (5, 6, 9, 12) 2, 4, (5, 6, 9, 12) 2, 4, (5, 6, 9, 12) 2, 4, (5, 6, 9, 12) 7 7 Applicable Figures Fixed Output Output Adjustable Negative Output Voltage +100 +250 −6 (Note 7) −9 −12 −15 −28 −45 −100 −250 Applicable Figures 7 7 3, (10) 3, 10 3, 10 3, 10 3, 10 8 8 8 Fixed Output 5% Output Adjustable ± 5% R1 4.12 3.57 2.15 1.15 1.87 4.87 7.87 21.0 3.57 3.57 R2 3.01 3.65 4.99 6.04 7.15 7.15 7.15 7.15 48.7 78.7 ± 10% (Note 6) R1 1.8 1.5 0.75 0.5 0.75 2.0 3.3 5.6 2.2 2.2 P1 0.5 0.5 0.5 0.5 1.0 1.0 1.0 1.0 10 10 R2 1.2 1.5 2.2 2.7 2.7 3.0 3.0 2.0 39 68 ± 5% R1 3.57 3.57 3.57 3.48 3.57 3.65 3.57 3.57 3.57 3.57 R2 102 255 2.43 5.36 8.45 11.5 24.3 41.2 97.6 249 R1 2.2 2.2 1.2 1.2 1.2 1.2 1.2 2.2 2.2 2.2 ± 10% P1 10 10 0.5 0.5 0.5 0.5 0.5 10 10 10 R2 91 240 0.75 2.0 3.3 4.3 10 33 91 240 TABLE 2. Formulae for Intermediate Output Voltages Outputs from +2 to +7 volts (Figures 1, 4, 5, 6, 9, 12 Outputs from +4 to +250 volts (Figure 7) Current Limiting Outputs from +7 to +37 volts (Figures 2, 4, 5, 6, 9, 12) Outputs from −6 to −250 volts (Figures 3, 8, 10) Foldback Current Limiting 5 www.national.com Typical Applications DS008563-11 Typical Performance DS008563-9 Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 1A) +15V 1.5 mV 15 mV for minimum temperature drift. R3 may be eliminated for minimum component count. Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 50 mA) 15V 1.5 mV 4.5 mV FIGURE 4. Positive Voltage Regulator (External NPN Pass Transistor) FIGURE 2. Basic High Voltage Regulator (VOUT = 7 to 37 Volts) DS008563-10 Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 100 mA) −15V 1 mV 2 mV FIGURE 3. Negative Voltage Regulator www.national.com 6 Typical Applications (Continued) DS008563-12 Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 1A) +5V 0.5 mV 5 mV FIGURE 5. Positive Voltage Regulator (External PNP Pass Transistor) DS008563-13 Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 10 mA) Short Circuit Current +5V 0.5 mV 1 mV 20 mA FIGURE 6. Foldback Current Limiting 7 www.national.com Typical Applications (Continued) DS008563-14 Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 20V) Load Regulation (∆IL = 50 mA) +50V 15 mV 20 mV FIGURE 7. Positive Floating Regulator DS008563-15 Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 20V) Load Regulation (∆IL = 100 mA) −100V 30 mV 20 mV FIGURE 8. Negative Floating Regulator www.national.com 8 Typical Applications (Continued) DS008563-16 Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 30V) Load Regulation (∆IL = 2A) +5V 10 mV 80 mV FIGURE 9. Positive Switching Regulator DS008563-17 Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 20V) Load Regulation (∆IL = 2A) −15V 8 mV 6 mV FIGURE 10. Negative Switching Regulator 9 www.national.com Typical Applications (Continued) DS008563-18 Note: Current limit transistor may be used for shutdown if current limiting is not required. Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 50 mA) +5V 0.5 mV 1.5 mV FIGURE 11. Remote Shutdown Regulator with Current Limiting DS008563-19 Regulated Output Voltage Line Regulation (∆VIN = 10V) Load Regulation (∆IL = 100 mA) FIGURE 12. Shunt Regulator +5V 0.5 mV 1.5 mV www.national.com 10 Typical Applications (Continued) DS008563-21 FIGURE 13. Output Voltage Adjust (Note 6) Schematic Diagram DS008563-1 11 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted Leadless Chip Carrier Package (E) Order Number LM723E/883 NS Package E20A Metal Can Package (H) Order Number LM723H, LM723H/883 or LM723CH NS Package H10C www.national.com 12 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Ceramic Dual-In-Line Package (J) Order Number LM723J/883 NS Package J14A 13 www.national.com LM723/LM723C Voltage Regulator Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Molded Dual-In-Line Package (N) Order Number LM723CN NS Package N14A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.