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| LM723 HIGH PRECISION VOLTAGE REGULATOR s s s s s s INPUT VOLTAGE UP TO 40V OUTPUT VOLTAGE ADJUSTABLE FROM 2 TO 37V POSITIVE OR NEGATIVE SUPPLY OPERATION SERIES, SHUNT, SWITCHING OR FLOATING OPERATION OUTPUT CURRENT TO 150mA WITHOUT EXTERNAL PASS TRANSISTOR ADJUSTABLE CURRENT LIMITING DIP-14 DESCRIPTION The LM723 is a monolithic integrated programmable voltage regulator, assembled in 14-lead dual in-line plastic and SO-14 micro package. The circuit provides internal current limiting. When the output current exceeds 150mA an external NPN or PNP pass element may be used. Provisions are made for adjustable current limiting and remote shut-down. SO-14 SCHEMATIC DIAGRAM September 2003 1/16 LM723 ABSOLUTE MAXIMUM RATINGS Value Symbol VI VI-O IO IREF Top Tstg TJ Parameter LM723 DC Input Voltage Dropout Voltage Output Current Current from VREF Operating Temperature Storage Temperature Junction Temperature 40 40 150 15 -55 to 125 -65 to 150 150 LM723C 40 40 150 25 0 to 70 -65 to 150 125 V V mA mA C C C Unit Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. THERMAL DATA Symbol Rthj-amb Parameter Thermal Resistance Junction-Ambient Max DIP14 200 SO-14 160 Unit C/W PIN CONNECTION (top view) ORDERING CODES TYPE LM723 LM723C DIP-14 LM723N LM723CN SO-14 LM723CD 2/16 LM723 TEST CIRCUITS (pin configuration relative to the plastic package) VI = 12V; VO = 5V: IO = 1mA; R1/R2 10K ELECTRICAL CHARACTERISTICS FOR LM723 (refer to the test circuits, Tamb = 25C, unless otherwise specified.) Symbol Parameter Test Conditions VI = 12 to 15 V VI = 12 to 40 V VI = 12 to 15 V, VO/VO Load Regulation VREF SVR VO/T ISC VI VO VO-VI Id KVH eN Quiescent Current Long Term Stability Output Noise Voltage BW = 100 Hz to 10 KHz CREF = 0 CREF = 5F VI = 30V, IO = 0 mA Reference Voltage Supply Voltage Rejection Output Voltage Drift Output Current Limit Input Voltage Range Output Voltage Range RSC = 10 VO = 0 V 9.5 2 3 2.3 0.1 20 2.5 65 40 37 38 5 IO = 1 to 50 mA IO = 1 to 10 mA IREF = 160 A f = 100 Hz to 10KHz CREF = 0 CREF = 5F Ta = -55 to 125C 6.95 7.15 74 86 150 ppm/C mA V V V mA %/1000 hrs V Ta = -55 to 125C 0.03 Min. Typ. 0.01 0.02 Max. 0.1 0.2 0.3 0.15 0.6 7.35 V dB % Unit % VO/VI Line Regulation 3/16 LM723 ELECTRICAL CHARACTERISTICS FOR LM723C (refer to the test circuits, Tamb = 25C, unless otherwise specified.) Symbol Parameter Test Conditions VI = 12 to 15 V VI = 12 to 40 V VI = 12 to 15 V, VO/VO Load Regulation VREF SVR VO/T ISC VI VO VO-VI Id KVH eN Quiescent Current Long Term Stability Output Noise Voltage BW = 100 Hz to 10 KHz CREF = 0 CREF = 5F VI = 30V, IO = 0 mA Reference Voltage Supply Voltage Rejection Output Voltage Drift Output Current Limit Input Voltage Range Output Voltage Range RSC = 10 VO = 0 V 9.5 2 3 2.3 0.1 20 2.5 65 40 37 38 4 IO = 1 to 50 mA IO = 1 to 10 mA IREF = 160 A f = 100 Hz to 10KHz CREF = 0 CREF = 5F Ta = 0 to 70C 6.8 7.15 74 86 150 ppm/C mA V V V mA %/1000 hrs V Ta = 0 to 70C 0.03 Min. Typ. 0.01 0.1 Max. 0.1 0.5 0.3 0.2 0.6 7.5 V dB % Unit % VO/VI Line Regulation 4/16 LM723 TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified VO(NOM) = 3.3 V) Figure 1 : Maximum Output Current vs Voltage Drop Figure 4 : Load Regulation Characteristics without Current Limiting Figure 2 : Current Limiting Characteristics Figure 5 : Load Regulation Characteristics with Current Limiting Figure 3 : Current Limiting Characteristics vs Junction Temperature Figure 6 : Load Regulation Characteristics with Current Limiting 5/16 LM723 Figure 7 : Line Regulation vs Voltage Drop Figure 10 : Line Transient Response Figure 8 : Load Regulation vs Voltage Drop Figure 11 : Load Transient Response Figure 9 : Quiescent Drain Current vs Input Voltage Figure 12 : Output Impedance vs Frequency 6/16 LM723 TABLE 1: Resistor Values (K) for standard Output Voltages Output Voltage +3 +5 +6 +9 +12 +15 +28 +45 +75 +100 +250 -6** -9 -12 -15 -28 -45 -100 -250 Fixed Output 5% Applicable Figures R1 13, 16, 17, 18, 21, 23 13, 16, 17, 18, 21, 23 13, 16, 17, 18, 21, 23 14, 16, 17, 18, 21, 23 14, 16, 17, 18, 21, 23 14, 16, 17, 18, 21, 23 14, 16, 17, 18, 21, 23 19 19 19 19 15 15 15 15 15 20 20 20 4.12 2.15 1.15 1.87 4.87 7.87 21 3.57 3.57 3.57 3.57 3.57 3.48 3.57 3.65 3.57 3.57 3.57 3.57 R2 3.01 4.99 6.04 7.15 7.15 7.15 7.15 48.7 78.7 102 255 2.43 5.36 8.45 11.5 24.3 21.2 97.6 249 R1 1.8 0.75 0.5 0.75 2 3.3 5.6 2.2 2.2 2.2 2.2 1.2 1.2 1.2 1.2 1.2 2.2 2.2 2.2 P1 0.5 0.5 0.5 1 1 1 1 10 10 10 10 0.5 0.5 0.5 0.5 0.5 10 10 10 R2 1.2 2.2 2.7 2.7 3 3 2 39 68 91 240 0.75 2 3.3 4.3 10 33 91 240 Output Adjustable 10% * * Replace R1/R2 divider with the circuit of fig. 24. ** V+ must be connected to a +3V or greater supply. TABLE 2: Formula for Intermediate Output Voltages Outputs from 2 to 7V Fig. 13, 16, 17, 18, 21, 23 VO=(VREFxR2)/(R1+R2) Outputs from 7 to 37V Fig. 14, 16, 17, 18, 21, 23 VO=VREFx[(R1+R2)/R2] Outputs from 4 to 250V Fig. 19 VO=(VREF/2)x[(R2-R1)/R1]; R3=R4 Outputs from -6 to -250V Fig. 15, 20 VO=(VREF/2)x[(R1+R2)/R1]; R3=R4 Current Limit ILIMIT=VSENSE/RSC Foldback Current Limiting IKNEE=[(VOxR3)/(RSCxR4)]x[VSENSEx(R3+R4)]/ (RSCxR4) ISHORTCKT=(VSENSE/RSC)x[(R3+R4)/R4] 7/16 LM723 APPLICATIONS INFORMATION Figure 13 : Basic Low Voltage Regulator (VO = 2 to 7V). NOTE: R3 = (R1xR2)/(R1+R2) for minimum temperature drift. R3 may be eliminated for minimum component count. Typical performance Regulated Output Voltage..................5V Line Regulation (VI = 3V)..........0.5mV Load Regulation (IO = 50mA)...1.5mV Figure 14 : Basic High Voltage Regulator (VO = 7 to 37V) NOTE: R3 = (R1xR2)/(R1+R2) for minimum temperature drift. R3 may be eliminated for minimum component count. Typical performance Regulated Output Voltage..................15V Line Regulation (VI = 3V)............1.5mV Load Regulation (IO = 50mA).....4.5mV 8/16 LM723 Figure 15 : Negative Voltage Regulator Typical performance Regulated Output Voltage.................15V Line Regulation (VI = 3V)...............1mV Load Regulation (IO = 100mA)......2mV Figure 16 : Positive Voltage Regulator (External NPN Pass Transistor) Typical performance Regulated Output Voltage................15V Line Regulation (VI = 3V)...........1.5mV Load Regulation (IO = 1A)...........15mV Figure 17 : Positive Voltage Regulator (External PNP Pass Transistor) Typical performance Regulated Output Voltage...................5V Line Regulation (VI = 3V)...........0.5mV Load Regulation (IO = 1A)..........1.5mV 9/16 LM723 Figure 18 : Foldback current limiting Typical performance Regulated Output Voltage....................5V Line Regulation (VI = 3V)............0.5mV Load Regulation (IO = 10mA)........1mV Current Limit Knee...........................20mA Figure 19 : Positive Floating Regulator Typical performance Regulated Output Voltage....................100V Line Regulation (VI = 20V)...............15mV Load Regulation (IO = 50mA)..........20mV Figure 20 : Negative Floating Regulator Typical performance Regulated Output Voltage....................-100V Line Regulation (VI = 20V).................30mV Load Regulation (IO = 100mA)..........20mV 10/16 LM723 Figure 21 : Positive Switching Regulator Typical performance Regulated Output Voltage....................5V Line Regulation (VI = 30V)...........10mV Load Regulation (IO = 2A)............80mV Figure 22 : Remote Shutdown Regulator with Current Limiting Note: current limit transistor may be used for shutdown if current limiting is not required. Typical performance Regulated Output Voltage...........................5V Line Regulation (VI = 3V)...................0.5mV Load Regulation (IO = 50mA)............1.5mV Figure 23 : Shunt Regulator Typical performance Regulated Output Voltage............................5V Line Regulation (VI = 10V).....................2mV Load Regulation (IO = 100mA)..............5mV 11/16 LM723 Figure 24 : Output Voltage Adjust 12/16 LM723 Plastic DIP-14 MECHANICAL DATA mm. DIM. MIN. a1 B b b1 D E e e3 F I L Z 1.27 3.3 2.54 0.050 8.5 2.54 15.24 7.1 5.1 0.130 0.100 0.51 1.39 0.5 0.25 20 0.335 0.100 0.600 0.280 0.201 1.65 TYP MAX. MIN. 0.020 0.055 0.020 0.010 0.787 0.065 TYP. MAX. inch P001A 13/16 LM723 SO-14 MECHANICAL DATA DIM. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 8.55 5.8 1.27 7.62 4.0 5.3 1.27 0.68 8 (max.) 0.149 0.181 0.019 8.75 6.2 0.35 0.19 0.5 45 (typ.) 0.336 0.228 0.050 0.300 0.157 0.208 0.050 0.026 0.344 0.244 0.1 mm. MIN. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010 PO13G 14/16 LM723 Tape & Reel SO-14 MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.4 9 2.1 3.9 7.9 12.8 20.2 60 22.4 6.6 9.2 2.3 4.1 8.1 0.252 0.354 0.082 0.153 0.311 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.260 0.362 0.090 0.161 0.319 MIN. TYP. MAX. 12.992 0.519 inch 15/16 |
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