LM723,LM723C LM723/LM723C Voltage Regulator Literature Number: SNVS765B LM723/LM723C Voltage Regulator General Description Features 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. 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 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. Connection Diagrams Dual-In-Line Package Metal Can Package 00856303 00856302 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 00856320 Top View Order Number LM723E/883 See NS Package E20A © 2004 National Semiconductor Corporation DS008563 www.national.com LM723/LM723C Voltage Regulator June 1999 LM723/LM723C Equivalent Circuit* 00856304 *Pin numbers refer to metal can package. Typical Application 00856308 for minimum temperature drift. Typical Performance Regulated Output Voltage 5V Line Regulation (∆VIN = 3V) 0.5mV Load Regulation (∆IL = 50 mA) 1.5mV FIGURE 1. Basic Low Voltage Regulator (VOUT = 2 to 7 Volts) www.national.com 2 If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Cavity DIP (Note 2) 900 mW Molded DIP (Note 2) 660 mW Operating Temperature Range LM723 (Note 10) −55˚C to +150˚C LM723C Pulse Voltage from V+ to V− (50 ms) 50V Continuous Voltage from V+ to V− 40V Input-Output Voltage Differential 40V Maximum Amplifier Input Voltage (Either Input) 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.) 8.5V Maximum Amplifier Input Voltage (Differential) Hermetic Package 300˚C Plastic Package 5V Current from VZ 25 mA Current from VREF 15 mA Internal Power Dissipation Metal Can (Note 2) 260˚C ESD Tolerance 1200V (Human body model, 1.5 kΩ in series with 100 pF) 800 mW Electrical Characteristics (Note 3) (Note 10) Parameter Conditions LM723 Min Line Regulation VIN = 12V to VIN = 15V LM723C Typ Max 0.01 0.1 −55˚C ≤ TA ≤ +125˚C Min Max 0.01 0.1 0.3 % VOUT 0.02 0.2 0.1 0.5 % VOUT IL = 1 mA to IL = 50 mA 0.03 0.15 0.03 0.2 % VOUT 0.6 % VOUT 0˚C ≤ TA ≤ +70˚C 0.6 % VOUT f = 50 Hz to 10 kHz, CREF = 0 74 74 dB f = 50 Hz to 10 kHz, CREF = 5 µF 86 86 dB Average Temperature Coeffic- −55˚C ≤ TA ≤ +125˚C ient of Output Voltage (Note 8) 0˚C ≤ TA ≤ +70˚C Short Circuit Current Limit RSC = 10Ω, VOUT = 0 0.002 0.015 %/˚C 0.003 65 Reference Voltage Output Noise Voltage 0.3 VIN = 12V to VIN = 40V −55˚C ≤ TA ≤ +125˚C Ripple Rejection % VOUT % VOUT 0˚C ≤ TA ≤ +70˚C Load Regulation Units Typ 6.95 7.15 0.015 65 7.35 6.80 7.15 %/˚C mA 7.50 V BW = 100 Hz to 10 kHz, CREF = 0 86 86 µVrms BW = 100 Hz to 10 kHz, CREF = 5 µF 2.5 2.5 µVrms 0.05 0.05 %/1000 hrs Long Term Stability 4.0 mA Input Voltage Range 9.5 40 9.5 40 V Output Voltage Range 2.0 37 2.0 37 V Input-Output Voltage Differential 3.0 38 3.0 38 V Standby Current Drain IL = 0, VIN = 30V 1.7 θJA Molded DIP θJA Cavity DIP 150 θJA H10C Board Mount in Still Air 165 3 3.5 1.7 105 ˚C/W 165 ˚C/W ˚C/W www.national.com LM723/LM723C Absolute Maximum Ratings (Note 1) LM723/LM723C Electrical Characteristics (Note 3) (Note 10) Parameter (Continued) Conditions LM723 Min θJA Typ H10C Board Mount in 400 LF/Min Air Flow θJC LM723C Max Min Typ Units Max 66 66 ˚C/W 22 22 ˚C/W 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. Note 9: Guaranteed by correlation to other tests. 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 00856323 00856322 Load & Line Regulation vs Input-Output Voltage Differential Current Limiting Characteristics 00856325 00856324 www.national.com 4 LM723/LM723C Typical Performance Characteristics (Continued) Current Limiting Characteristics vs Junction Temperature Standby Current Drain vs Input Voltage 00856326 00856327 Line Transient Response Load Transient Response 00856328 00856329 Output Impedence vs Frequency 00856330 5 www.national.com LM723/LM723C Maximum Power Ratings LM723 Power Dissipation vs Ambient Temperature Noise vs Filter Capacitor (CREF in Circuit of Figure 1) (Bandwidth 100 Hz to 10 kHz) 00856331 00856332 LM723C Power Dissipation vs Ambient Temperature 00856333 TABLE 1. Resistor Values (kΩ) for Standard Output Voltage Positive Applicable Fixed Output Negative Output Figures Output Adjustable Output Applicable ± 10% (Note 6) Voltage Figures ± 5% Voltage Fixed 5% Output Output Adjustable ± 5% ± 10% (Note 5) R1 R2 R1 P1 R2 +3.0 1, 5, 6, 9, 12 (4) 4.12 3.01 1.8 0.5 1.2 +3.6 1, 5, 6, 9, 12 (4) 3.57 3.65 1.5 0.5 1.5 +250 7 3.57 255 2.2 10 240 +5.0 1, 5, 6, 9, 12 (4) 2.15 4.99 0.75 0.5 2.2 −6 (Note 7) 3, (10) 3.57 2.43 1.2 0.5 0.75 +6.0 1, 5, 6, 9, 12 (4) 1.15 6.04 0.5 0.5 2.7 −9 3, 10 3.48 5.36 1.2 0.5 2.0 +100 7 R1 R2 R1 P1 R2 3.57 102 2.2 10 91 +9.0 2, 4, (5, 6, 9, 12) 1.87 7.15 0.75 1.0 2.7 −12 3, 10 3.57 8.45 1.2 0.5 3.3 +12 2, 4, (5, 6, 9, 12) 4.87 7.15 2.0 1.0 3.0 −15 3, 10 3.65 11.5 1.2 0.5 4.3 +15 2, 4, (5, 6, 9, 12) 7.87 7.15 3.3 1.0 3.0 −28 3, 10 3.57 24.3 1.2 0.5 10 +28 2, 4, (5, 6, 9, 12) 21.0 7.15 5.6 1.0 2.0 −45 8 3.57 41.2 2.2 10 33 +45 7 3.57 48.7 2.2 10 39 −100 8 3.57 97.6 2.2 10 91 +75 7 3.57 78.7 2.2 10 68 −250 8 3.57 249 2.2 10 240 www.national.com 6 LM723/LM723C TABLE 2. Formulae for Intermediate Output Voltages Outputs from +2 to +7 volts Outputs from +4 to +250 volts (Figures 1, 4, 5, 6, 9, 12 (Figure 7) Outputs from +7 to +37 volts Outputs from −6 to −250 volts (Figures 2, 4, 5, 6, 9, 12) (Figures 3, 8, 10) Current Limiting Foldback Current Limiting Typical Applications 00856310 00856309 Typical Performance Regulated Output Voltage −15V for minimum temperature drift. Line Regulation (∆VIN = 3V) 1 mV R3 may be eliminated for Load Regulation (∆IL = 100 mA) 2 mV minimum component count. FIGURE 3. Negative Voltage Regulator Typical Performance Regulated Output Voltage 15V Line Regulation (∆VIN = 3V) 1.5 mV Load Regulation (∆IL = 50 mA) 4.5 mV FIGURE 2. Basic High Voltage Regulator (VOUT = 7 to 37 Volts) 7 www.national.com LM723/LM723C Typical Applications (Continued) 00856311 Typical Performance Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 1A) +15V 15 mV 1.5 mV FIGURE 4. Positive Voltage Regulator (External NPN Pass Transistor) 00856312 Typical Performance Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 1A) +5V 0.5 mV FIGURE 5. Positive Voltage Regulator (External PNP Pass Transistor) www.national.com 8 5 mV LM723/LM723C Typical Applications (Continued) 00856313 Typical Performance Typical Performance Regulated Output Voltage Line Regulation (∆VIN = 3V) Load Regulation (∆IL = 10 mA) +5V Short Circuit Current 0.5 mV 1 mV 20 mA FIGURE 6. Foldback Current Limiting 00856314 Typical Performance Regulated Output Voltage +50V Line Regulation (∆VIN = 20V) 15 mV Load Regulation (∆IL = 50 mA) 20 mV FIGURE 7. Positive Floating Regulator 9 www.national.com LM723/LM723C Typical Applications (Continued) 00856315 Typical Performance Regulated Output Voltage −100V Line Regulation (∆VIN = 20V) 30 mV Load Regulation (∆IL = 100 mA) 20 mV FIGURE 8. Negative Floating Regulator 00856316 Typical Performance Regulated Output Voltage +5V Line Regulation (∆VIN = 30V) 10 mV Load Regulation (∆IL = 2A) 80 mV FIGURE 9. Positive Switching Regulator www.national.com 10 LM723/LM723C Typical Applications (Continued) 00856317 Typical Performance Regulated Output Voltage −15V Line Regulation (∆VIN = 20V) 8 mV Load Regulation (∆IL = 2A) 6 mV FIGURE 10. Negative Switching Regulator 00856318 Note: Current limit transistor may be used for shutdown if current limiting is not required. Typical Performance Regulated Output Voltage +5V Line Regulation (∆VIN = 3V) 0.5 mV Load Regulation (∆IL = 50 mA) 1.5 mV FIGURE 11. Remote Shutdown Regulator with Current Limiting 11 www.national.com LM723/LM723C Typical Applications (Continued) 00856319 Regulated Output Voltage +5V Line Regulation (∆VIN = 10V) 0.5 mV Load Regulation (∆IL = 100 mA) 1.5 mV FIGURE 12. Shunt Regulator 00856321 FIGURE 13. Output Voltage Adjust (Note 6) www.national.com 12 LM723/LM723C Schematic Diagram 00856301 13 www.national.com LM723/LM723C 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 14 LM723/LM723C Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Ceramic Dual-In-Line Package (J) Order Number LM723J/883 NS Package J14A 15 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 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. 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