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 Plastic DIP-14 SO-14 The LM723 is a monolithic integrated programmable voltage regulator, assembled in 14-lead dual in-line plastic and SO-14 micropackage. The circuit provides internal current limiting. When the output current excedes 150mA an external NPN or PNP pass element may be used. Provisions are made for adjustable current limiting and remote shut-down. BLOCK DIAGRAM September 1998 1/12 LM723 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit LM723 LM723C Vi DC Input Voltage 40 40 V ∆V i-o Dropout Voltage 40 40 V Io Output Current 150 150 mA I ref Current from Vref 15 25 mA To p Operating Temperature -55 to 125 0 to 70 o C T stg Storage Temperature -65 to 150 -65 to 150 o C 150 125 o C Plastic DIP-14 SO-14 Tj Junction Temperature ABSOLUTE MAXIMUM RATINGS Symbol Parameter R thj-a mb Thermal Resistance Junction-Ambient Max 200 160 PIN CONNECTION (top views) ORDER CODES Type Plastic DIP-14 SO-14 LM723 LM723C LM723N LM723CN LM723CD TEST CIRCUIT (pin configuration relative to the plastic package) Vi = 12V Vo = 5V Io = 1mA R1/R2 ≤ 10KΩ 2/12 Unit o C/W LM723 ELECTRICAL CHARACTERISTICS FOR LM723 (refer to the test circuits, Tamb = 25 oC, unless otherwise specified) Symbol Parameter ∆V o/∆V i Line Regulation ∆Vo /V o Load Regulation Test Conditions Min. Vi = 12 to 15V Vi = 12 to 40V Vi = 12 to 15V -55 C ≤ Tamb ≤ 125 C Io = 1 to 50 mA Io = 1 to 10 mA -55 C ≤ Tamb ≤ 125 C o o o o V REF Reference Voltage Iref = 160 µA SVR Supply Voltage Rejection f = 100 Hz to 10 KHz f = 100 Hz to 10 KHz 6.95 Typ. Max. Unit 0.01 0.02 0.1 0.2 0.3 % % % 0.03 0.15 0.6 % % 7.15 7.35 74 86 Cref = 0 Cref = 5 µF ∆V o /∆T Output Voltage Drift I sc Output Current Limit Vi Input Voltage Range Vo Output Voltage Range 150 65 Rsc = 10Ω Vo = 0 Id Quiescent Current K VH Long Term Stability eN Output Noise Voltage 40 V 2 37 V 3 38 V 5 mA Vi = 30 V Io = 0 mA 2.3 BW = 100 Hz to 10 KHz BW = 100 Hz to 10 KHz ppm/ oC mA 9.5 V o -V i V dB dB Cref = 0 Cref = 5 µF 0.1 %/1000 hrs 20 2.5 µV µV ELECTRICAL CHARACTERISTICS FOR LM723C (refer to the test circuits, Tamb = 25 oC, unless otherwise specified) Symbol Parameter ∆V o/∆V i Line Regulation ∆Vo /V o Load Regulation Test Conditions Min. Vi = 12 to 15V Vi = 12 to 40V Vi = 12 to 15V 0oC ≤ Tamb ≤ 70oC Io = 1 to 50 mA Io = 1 to 10 mA 0 C ≤ Tamb ≤ 70 C o V REF Reference Voltage Iref = 160 µA SVR Supply Voltage Rejection f = 100 Hz to 10 KHz f = 100 Hz to 10 KHz Typ. Max. Unit 0.01 0.1 0.1 0.5 0.3 % % % 0.03 0.2 0.6 % % 7.15 7.5 o 6.8 74 86 Cref = 0 Cref = 5 µF ∆V o /∆T Output Voltage Drift I sc Output Current Limit Vi Input Voltage Range Vo Output Voltage Range 150 65 Rsc = 10Ω Vo = 0 V o -V i Id Quiescent Current K VH Long Term Stability eN Output Noise Voltage Vi = 30 V Io = 0 mA BW = 100 Hz to 10 KHz BW = 100 Hz to 10 KHz ppm/ oC mA 9.5 40 2 37 V 3 38 V 4 mA 2.3 Cref = 0 Cref = 5 µF V dB dB V 0.1 %/1000 hrs 20 2.5 µV µV 3/12 LM723 Figure 1 : Maximum Output Current vs. Voltage Drop. Figure 2 : Current Limiting Characteristics. Figure 3 : Current Limiting Characteristics vs. Junction Temperature. Figure 4 : Load Regulation Characteristics without Current Limiting. Figure 5 : Load Regulation Characteristics with Current Limiting. Figure 6 : Load Regulation Characteristics with Current Limiting 4/12 LM723 Figure 7 : Line Regulation vs. Voltage Drop. Figure 8 : Load Regulation vs. Voltage Drop. Figure 9 : Quiescent Drain Current vs. Input Voltage. Figure 10 : Line Transient Response. Figure 11 : Load Transient Response. Figure 12 : Output Impedance vs. Frequency. 5/12 LM723 TABLE 1: Resistor Values (KΩ) for standard Output Voltages Output Voltage Applicable Figures +3 Fixed Output ± 5% Output Adjustable ± 10% * R1 R2 R1 P1 R2 13, 16, 17, 18, 21, 23 4.12 3.01 1.8 0.5 1.2 +5 13, 16, 17, 18, 21, 23 2.15 4.99 0.75 0.5 2.2 +6 13, 16, 17, 18, 21, 23 1.15 6.04 0.5 0.5 2.7 +9 14, 16, 17, 18, 21, 23 1.87 7.15 0.75 1 2.7 +12 14, 16, 17, 18, 21, 23 4.87 7.15 2 1 3 +15 14, 16, 17, 18, 21, 23 7.87 7.15 3.3 1 3 +28 14, 16, 17, 18, 21, 23 21 7.15 5.6 1 2 +45 19 3.57 48.7 2.2 10 39 +75 19 3.57 78.7 2.2 10 68 +100 19 3.57 102 2.2 10 91 +250 19 3.57 255 2.2 10 240 -6** 15 3.57 2.43 1.2 0.5 0.75 -9 15 3.48 5.36 1.2 0.5 2 -12 15 3.57 8.45 1.2 0.5 3.3 -15 15 3.65 11.5 1.2 0.5 4.3 -28 15 3.57 24.3 1.2 0.5 10 -45 20 3.57 21.2 2.2 10 33 -100 20 3.57 97.6 2.2 10 91 -250 20 3.57 249 2.2 10 240 Note: * Replace R1/R2 divider with the circuit of fig24. ** V+ must be connected to a +3V or greater supply. TABLE 2: Formulae for Intermediate Output Voltages Outputs from +2 to +7V Fig.13, 16, 17, 18, 21, 23 R2 V O = [ Vref x ] R1 + R2 Outputs from +4 to +250V Fig.19 Vr ef R2 − R 1 x ; R3 = R 4 VO = R1 2 Current Limiting O utputs from +7 to +37V F ig.14, 16, 17, 18, 21, 23 R1 + R2 V O = [ Vref x ] Outputs from -6 to -250V Fig.15, 20 Vr ef R1 + R 2 ; R = R4 VO = x R1 3 2 Foldback Current Limiting VO R3 VSENSE (R3 + R4) IKNEE = x R sc R4 R sc R4 R2 I LIMI T = I SHORT 6/12 CKT VSENSE R sc VSENSE R 3 + R4 = x R4 Rsc LM723 APPLICATION INFORMATION (pin numbers relative to the plastic package). Figure 13 : Basic Low Voltage Regulator (Vo = 2 to 7V). R1 × R2 for minimum temperature drift. R1 + R2 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 Note; R3 = Figure 15 : Negative Voltage Regulator. Typical performance Regulated Output Voltage .................... ............... ...............15V Line Regulation (∆Vi = 3V)............. ................. ................. ..1mV Load Regulation (∆IO = 100mA) ..................... ................. ..2mV Figure 14 : Basic High Voltage Regulator (Vo = 7 to 37V). R1 × R2 for minimum temperature drift. R1 + R2 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 Note; R3 = Figure 16 : Positive Voltage Regulator (external Typical performance Regulated Output Voltage............... ................. ............... + 15V Line Regulation (∆Vi = 3V)........................ ................. .... 1.5mV Load Regulation (∆IO = 1A)............. ................. ............... 15mV 7/12 LM723 APPLICATION INFORMATION (continued). Figure 17 : Positive Voltage Regulator (External PNP Pass Transistor) Typical performance Regulated Output Voltage.......................... ................. .........5V Line Regulation (∆Vi = 3V) ......................... ................. ...0.5mV Load Regulation (∆IO = 1 A) .................. ............... ..........1.5mV Figure 19 : Positive Floating Regulator Typical performance Regulated Output Voltage .................... ............... ............100 V Line Regulation (∆Vi = 20V)............................ ............... 15 mV Load Regulation (∆IO = 50mA) ....................... ............ ... 20 mV 8/12 Figure 18 : Foldback current limiting Typical performance Regulated Output Voltage......................... ................. ......... 5 V Line Regulation (∆Vi = 3V).............. ................. .............. 0.5mV Load Regulation (∆IO = 10mA).................. ................. ....... 1mV Current Limit Knee..................... ............... ................. ....20 mA Figure 20 : Negative Floating Regulator Typical performance Regulated Output Voltage............... ................. ............ - 100 V Line Regulation (∆Vi = 20V)...................... ................. .... 30 mV Load Regulation (∆IO = 100 mA)............... ................. .... 20 mV LM723 APPLICATION INFORMATION (continued). Figure 21 : Positive Switching Regulator Figure 22 : Remote Shutdown Regulator With Current Limiting Note: current limi t transistor may be used for shutdown if current limiting is not required. Typical performance Regulated Output Voltage.......................... ................. ........5 V Line Regulation (∆Vi = 30 V) ........................... ............... 10 mV Load Regulation (∆IO = 2 A) .................. ............... ..........80 mV Figure 23 : Shunt Regulator. Typical performance Regulated Output Voltage......................... ................. ......... 5 V Line Regulation (∆Vi = 3 V) ....................... ................. ... 0.5 mV Load Regulation (∆IO = 50 mA)............ ................. ........ 1.5 mV Figure 24 : Output Voltage Adjust Typical performance Regulated Output Voltage .................... ............... ................5 V Line Regulation (∆Vi = 10 V)................. ............... .............2 mV Load Regulation (∆IO = 100 mA) ............... ................. ......5 mV 9/12 LM723 Plastic DIP-14 MECHANICAL DATA mm DIM. MIN. a1 0.51 B 1.39 TYP. inch 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 10/12 LM723 SO-14 MECHANICAL DATA mm DIM. 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 E 5.8 8.75 0.336 6.2 0.228 0.344 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.) P013G 11/12 LM723 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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