LM723 HIGH PRECISION VOLTAGE REGULATOR ■ ■ ■ ■ ■ ■ 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 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. DIP-14 SO-14 SCHEMATIC DIAGRAM September 2003 1/16 LM723 ABSOLUTE MAXIMUM RATINGS Value Symbol Parameter Unit LM723 LM723C VI DC Input Voltage 40 40 V ∆VI-O Dropout Voltage 40 40 V IO Output Current 150 150 mA IREF Current from VREF 15 25 mA Top Operating Temperature -55 to 125 0 to 70 °C Tstg Storage Temperature -65 to 150 -65 to 150 °C TJ Junction Temperature 150 125 °C 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 SO-14 Unit 200 160 °C/W PIN CONNECTION (top view) ORDERING CODES 2/16 TYPE DIP-14 SO-14 LM723 LM723C LM723N LM723CN LM723CD LM723 TEST CIRCUITS (pin configuration relative to the plastic package) VI = 12V; VO = 5V: IO = 1mA; R1/R2 ≤ 10KΩ ELECTRICAL CHARACTERISTICS FOR LM723 (refer to the test circuits, Tamb = 25°C, unless otherwise specified.) Symbol Parameter ∆VO/∆VI Line Regulation Test Conditions Typ. Max. Unit VI = 12 to 15 V 0.01 0.1 % VI = 12 to 40 V 0.02 0.2 0.03 0.15 7.15 7.35 VI = 12 to 15 V, ∆VO/VO Load Regulation Ta = -55 to 125°C IO = 1 to 10 mA Ta = -55 to 125°C Reference Voltage IREF = 160 µA SVR Supply Voltage Rejection f = 100 Hz to 10KHz Output Voltage Drift ISC Output Current Limit VI Input Voltage Range VO Output Voltage Range 0.3 IO = 1 to 50 mA VREF ∆VO/∆T Min. 0.6 6.95 CREF = 0 74 CREF = 5µF 86 VO = 0 V 65 VO-VI Quiescent Current KVH Long Term Stability eN Output Noise Voltage VI = 30V, IO = 0 mA mA 40 V 2 37 V 2.3 0.1 BW = 100 Hz to 10 KHz ppm/°C 9.5 3 Id V dB 150 RSC = 10Ω % CREF = 0 20 CREF = 5µF 2.5 38 V 5 mA %/1000 hrs µV 3/16 LM723 ELECTRICAL CHARACTERISTICS FOR LM723C (refer to the test circuits, Tamb = 25°C, unless otherwise specified.) Symbol Parameter ∆VO/∆VI Line Regulation Test Conditions 0.5 Ta = 0 to 70°C 0.03 Ta = 0 to 70°C SVR Supply Voltage Rejection f = 100 Hz to 10KHz Output Current Limit Input Voltage Range VO Output Voltage Range Id Quiescent Current Long Term Stability eN Output Noise Voltage 4/16 0.2 7.15 CREF = 0 74 CREF = 5µF 86 7.5 VO = 0 V 65 9.5 VI = 30V, IO = 0 mA ppm/°C mA 40 V 2 37 V 3 38 V 2.3 0.1 BW = 100 Hz to 10 KHz V dB 150 RSC = 10Ω % 0.6 6.8 VO-VI KVH 0.3 IO = 1 to 50 mA IREF = 160 µA VI % 0.1 0.1 IO = 1 to 10 mA ISC Unit 0.01 Reference Voltage Output Voltage Drift Max. VI = 12 to 15 V VREF ∆VO/∆T Typ. VI = 12 to 40 V VI = 12 to 15 V, ∆VO/VO Load Regulation Min. CREF = 0 20 CREF = 5µF 2.5 4 mA %/1000 hrs µV 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 (KΩ) for standard Output Voltages Fixed Output ± 5% Output Voltage Applicable Figures +3 +5 +6 +9 +12 +15 +28 +45 +75 +100 +250 -6** -9 -12 -15 -28 -45 -100 -250 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 Output Adjustable ± 10% * R1 R2 R1 P1 R2 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 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 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 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 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 * 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 Outputs from 4 to 250V Fig. 19 VO=(VREFxR2)/(R1+R2) VO=(VREF/2)x[(R2-R1)/R1]; R3=R4 Outputs from 7 to 37V Fig. 14, 16, 17, 18, 21, 23 Outputs from -6 to -250V Fig. 15, 20 VO=VREFx[(R1+R2)/R2] 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. inch DIM. MIN. a1 0.51 B 1.39 TYP MAX. MIN. TYP. MAX. 0.020 1.65 0.055 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 15.24 0.600 F 7.1 0.280 I 5.1 0.201 L Z 3.3 1.27 0.130 2.54 0.050 0.100 P001A 13/16 LM723 SO-14 MECHANICAL DATA DIM. mm. MIN. TYP A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.2 a2 MAX. 0.003 0.007 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45˚ (typ.) D 8.55 8.75 0.336 0.344 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 7.62 0.300 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.68 0.026 8 ˚ (max.) PO13G 14/16 LM723 Tape & Reel SO-14 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 6.4 6.6 0.252 0.260 Bo 9 9.2 0.354 0.362 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 15/16