Details, datasheet, quote on part number: LM723
CategoryPower Management => Regulators => Linear Voltage Regulators => Positive => Adjustable
DescriptionLM723 - Voltage Regulator, Package: TO-5, Pin Nb=10
CompanyNational Semiconductor Corporation
DatasheetDownload LM723 datasheet
Cross ref.Similar parts: LM723H/883, LM723H/883B, LM723CT, LM723T/883B, LM723T/883C, LM723T/B, LM723T/C, LM723CH, LM723CH/A+, LM723CH/NOPB
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Features, Applications

The is a voltage regulator designed primarily for series regulator applications. By itself, it will supply output currents 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 to +70C temperature range, instead to +125C.


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 37V n Can be used as either a linear or a switching regulator

Typical Performance Regulated Output Voltage Line Regulation (VIN = 3V) Load Regulation (IL = 50 mA) 0.5mV 1.5mV FIGURE 1. Basic Low Voltage Regulator (VOUT to 7 Volts)

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- (50 ms) Continuous Voltage from 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 800 mW

Cavity DIP (Note 900 mW Molded DIP (Note 660 mW Operating Temperature Range to +70C Storage Temperature Range Metal Can to +150C Molded DIP to +150C Lead Temperature (Soldering, 4 sec. max.) Hermetic Package 300C Plastic Package 260C ESD Tolerance 1200V (Human body model, k in series with 100 pF)

Parameter Line Regulation Conditions Min VIN 12V to VIN TA +70C VIN 12V to VIN TA +125C 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 JA JC Molded DIP Cavity DIP H10C Board Mount in Still Air H10C Board Mount in 400 LF/Min Air Flow = 0, VIN to 10 kHz, CREF to 10 kHz, CREF to 10 kHz, CREF to 10 kHz, CREF TA +70C RSC = 10, VOUT LM723 Typ 0.01 Max Min LM723C Typ 0.01 Max 0.1 % VOUT % VOUT % VOUT % VOUT % VOUT % VOUT % VOUT dB %/C mA V Vrms %/1000 hrs mA V C/W Units

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 25C. Note 3: Unless otherwise specified, = 25C, VIN = 0, VOUT = 1 mA, RSC = 100 pF, CREF = 0 and divider impedance as seen by error amplifier 10 k 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 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 +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.


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