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| LM723 LM723C Voltage Regulator December 1994 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 a 70 C temperature range instead of b 55 C to a 125 C Features Y Y Y Y Y 150 mA output current without external pass transistor Output currents in excess of 10A possible by adding external transistors Input voltage 40V max Output voltage adjustable from 2V to 37V Can be used as either a linear or a switching regulator Connection Diagrams Dual-In-Line Package Metal Can Package TL H 8563 - 2 TL H 8563 - 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 Equivalent Circuit TL H 8563 - 20 Top View Order Number LM723E 883 See NS Package E20A TL H 8563 - 4 Pin numbers refer to metal can package C1995 National Semiconductor Corporation TL H 8563 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications (Note 9) Pulse Voltage from V a to Vb (50 ms) 50V Continuous Voltage from V a to Vb Input-Output Voltage Differential Maximum Amplifier Input Voltage (Either Input) Maximum Amplifier Input Voltage (Differential) Current from VZ Current from VREF 40V 40V 8 5V 5V 25 mA 15 mA 9) LM723 Parameter Line Regulation Conditions VIN e 12V to VIN e 15V b 55 C s TA s a 125 C 0 C s TA s a 70 C VIN e 12V to VIN e 40V IL e 1 mA to IL e 50 mA b 55 C s TA s a 125 C 0 C s TA s a 70 C f e 50 Hz to 10 kHz CREF e 0 f e 50 Hz to 10 kHz CREF e 5 mF b 55 C s TA s a 125 C 0 C s TA s a 70 C Internal Power Dissipation Metal Can (Note 1) Cavity DIP (Note 1) Molded DIP (Note 1) 800 mW 900 mW 660 mW Operating Temperature Range LM723 b55 C to a 150 C LM723C 0 C to a 70 C Storage Temperature Range Metal Can b65 C to a 150 C Molded DIP b55 C to a 150 C Lead Temperature (Soldering 4 sec max ) Hermetic Package 300 C Plastic Package 260 C ESD Tolerance 1200V (Human body model 1 5 kX in series with 100 pF) Electrical Characteristics (Notes 2 LM723C Max Min Typ 01 03 02 0 01 Max 01 03 05 02 06 Units % VOUT % VOUT % VOUT % VOUT % VOUT % VOUT % VOUT dB dB %C %C mA V mVrms mVrms % 1000 hrs 40 40 37 38 105 mA V V V CW CW 165 66 22 CW CW CW Min Typ 0 01 0 02 01 0 03 Load Regulation 0 03 0 15 06 74 86 0 002 0 015 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 iJA iJA iJA iJA iJC 74 86 0 003 0 015 RSC e 10X VOUT e 0 BW e 100 Hz to 10 kHz CREF e 0 BW e 100 Hz to 10 kHz CREF e 5 mF IL e 0 VIN e 30V 95 20 30 Molded DIP Cavity DIP H10C Board Mount in Still Air H10C Board Mount in 400 LF Min Air Flow 65 86 25 0 05 17 35 40 37 38 150 165 66 22 95 20 30 65 86 25 0 05 17 6 95 7 15 7 35 6 80 7 15 7 50 Note 1 See derating curves for maximum power rating above 25 C Note 2 Unless otherwise specified TA e 25 C VIN e V a e VC e 12V Vb e 0 VOUT e 5V IL e 1 mA RSC e 0 C1 e 100 pF CREF e 0 and divider impedance as seen by error amplifier s 10 kX 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 3 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 4 Figures in parentheses may be used if R1 R2 divider is placed on opposite input of error amp Note 5 Replace R1 R2 in figures with divider shown in Figure 13 Note 6 V a and VCC must be connected to a a 3V or greater supply Note 7 For metal can applications where VZ is required an external 6 2V zener diode should be connected in series with VOUT Note 8 Guaranteed by correlation to other tests Note 9 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 2 Typical Performance Characteristics Load Regulation Characteristics with Current Limiting Load Regulation Characteristics with Current Limiting Load Line Regulation vs Input-Output Voltage Differential Current Limiting Characteristics Current Limiting Characteristics vs Junction Temperature Standby Current Drain vs Input Voltage Line Transient Response Load Transient Response Output Impedence vs Frequency TL H 8563 - 6 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 TL H 8563 - 7 3 TABLE I Resistor Values (kX) for Standard Output Voltage Positive Output Voltage a3 0 a3 6 a5 0 a6 0 a9 0 a 12 a 15 a 28 a 45 a 75 Applicable Figures (Note 4) 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 Fixed Output g5% Output Adjustable g10% (Note 5) R1 18 15 0 75 05 0 75 20 33 56 22 22 P1 05 05 05 05 10 10 10 10 10 10 R2 12 15 22 27 27 30 30 20 39 68 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 Negative Output Voltage a 100 a 250 b 6 (Note 6) b9 b 12 b 15 b 28 b 45 b 100 b 250 Applicable Figures 7 7 3 (10) 3 10 3 10 3 10 3 10 8 8 8 Fixed Output g5% 5% Output Adjustable g10% 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 22 22 12 12 12 12 12 22 22 22 P1 10 10 05 05 05 05 05 10 10 10 R2 91 240 0 75 20 33 43 10 33 91 240 TABLE II Formulae for Intermediate Output Voltages Outputs from a 2 to a 7 volts (Figures 1 5 6 9 12 4 ) R2 VOUT e VREF c R1 a R2 Outputs from a 4 to a 250 volts (Figure 7 ) VREF R2 b R1 c VOUT e R3 e R4 2 R1 Current Limiting VSENSE ILIMIT e RSC Foldback Current Limiting VOUT R3 V (R3 a R4) a SENSE IKNEE e RSC R4 RSC R4 VSENSE R3 a R4 c ISHORT CKT e RSC R4 J J J Outputs from a 7 to a 37 volts (Figures 2 4 5 6 9 12 ) R1 a R2 VOUT e VREF c R2 Outputs from b6 to b250 volts (Figures 3 8 10 ) VREF R1 a R2 c VOUT e R3 e R4 2 R1 J J J Typical Applications TL H 8563-8 Note R3 e R1 R2 R1 a R2 for minimum temperature drift Typical Performance Regulated Output Voltage Line Regulation (DVIN e 3V) Load Regulation (DIL e 50 mA) 5V 0 5 mV 1 5 mV TL H 8563 - 9 FIGURE 1 Basic Low Voltage Regulator (VOUT e 2 to 7 Volts) Note R3 e R1 R2 R1 a R2 for minimum temperature drift R3 may be eliminated for minimum component count Typical Performance Regulated Output Voltage Line Regulation (DVIN e 3V) Load Regulation (DIL e 50 mA) 15V 1 5 mV 4 5 mV FIGURE 2 Basic High Voltage Regulator (VOUT e 7 to 37 Volts) 4 Typical Applications (Continued) TL H 8563 - 10 Typical Performance b 15V Regulated Output Voltage 1 mV Line Regulation (DVIN e 3V) Load Regulation (DIL e 100 mA) 2 mV TL H 8563 - 11 FIGURE 3 Negative Voltage Regulator Typical Performance a 15V Regulated Output Voltage Line Regulation (DVIN e 3V) 1 5 mV Load Regulation (DIL e 1A) 15 mV FIGURE 4 Positive Voltage Regulator (External NPN Pass Transistor) TL H 8563 - 13 TL H 8563 - 12 Typical Performance a 5V Regulated Output Voltage Line Regulation (DVIN e 3V) 0 5 mV e 1A) 5 mV Load Regulation (DIL Typical Performance a 5V Regulated Output Voltage 0 5 mV Line Regulation (DVIN e 3V) e 10 mA) 1 mV Load Regulation (DIL Short Circuit Current 20 mA FIGURE 6 Foldback Current Limiting FIGURE 5 Positive Voltage Regulator (External PNP Pass Transistor) 5 Typical Applications (Continued) TL H 8563 - 14 Typical Performance Regulated Output Voltage Line Regulation (DVIN e 20V) Load Regulation (DIL e 50 mA) a 50V 15 mV 20 mV FIGURE 7 Positive Floating Regulator TL H 8563 - 15 Typical Performance Regulated Output Voltage Line Regulation (DVIN e 20V) Load Regulation (DIL e 100 mA) b 100V 30 mV 20 mV FIGURE 8 Negative Floating Regulator 6 Typical Applications (Continued) TL H 8563 - 16 Typical Performance Regulated Output Voltage Line Regulation (DVIN e 30V) Load Regulation (DIL e 2A) a 5V 10 mV 80 mV FIGURE 9 Positive Switching Regulator TL H 8563 - 17 Typical Performance b 15V Regulated Output Voltage Line Regulation (DVIN e 20V) 8 mV 6 mV Load Regulation (DIL e 2A) FIGURE 10 Negative Switching Regulator 7 Typical Applications (Continued) TL H 8563 - 18 Note Current limit transistor may be used for shutdown if current limiting is not required Typical Performance Regulated Output Voltage Line Regulation (DVIN e 3V) Load Regulation (DIL e 50 mA) a 5V 0 5 mV 1 5 mV FIGURE 11 Remote Shutdown Regulator with Current Limiting TL H 8563 - 19 Typical Performance Regulated Output Voltage Line Regulation (DVIN e 10V) Load Regulation (DIL e 100 mA) a 5V 0 5 mV 1 5 mV FIGURE 12 Shunt Regulator 8 Typical Applications (Continued) TL H 8563 - 21 FIGURE 13 Output Voltage Adjust (See Note 5) Schematic Diagram TL H 8563 - 1 9 Physical Dimensions inches (millimeters) 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 10 Physical Dimensions inches (millimeters) (Continued) Ceramic Dual-In-Line Package (J) Order Number LM723J 883 NS Package J14A 11 LM723 LM723C Voltage Regulator Physical Dimensions inches (millimeters) (Continued) Lit 107210 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 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 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 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 Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 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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