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| (R) 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 Plastic DIP-14 SO-14 DESCRIPTION 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 Vi V i-o Io I ref To p T stg Tj DC Input Voltage Dropout Voltage Output Current Current from Vref Operating Temperature Storage Temperature Junction Temperature Parameter LM723 40 40 150 15 -55 to 125 -65 to 150 150 Value LM723C 40 40 150 25 0 to 70 -65 to 150 125 V V mA mA o o o Unit C C C ABSOLUTE MAXIMUM RATINGS Symbol Parameter Max Plastic DIP-14 200 SO-14 160 Unit o R thj-a mb Thermal Resistance Junction-Ambient C/W PIN CONNECTION (top views) ORDER CODES Type LM723 LM723C Plastic DIP-14 LM723N LM723CN SO-14 LM723CD TEST CIRCUIT (pin configuration relative to the plastic package) Vi = 12V Vo = 5V Io = 1mA R1/R2 10K 2/12 LM723 ELECTRICAL CHARACTERISTICS FOR LM723 (refer to the test circuits, Tamb = 25 oC, unless otherwise specified) Symbol Parameter Test Conditions Vi = 12 to 15V Vi = 12 to 40V Vi = 12 to 15V Io = 1 to 50 mA Io = 1 to 10 mA Iref = 160 A f = 100 Hz to 10 KHz f = 100 Hz to 10 KHz Rsc = 10 Vo = 0 9.5 2 3 Quiescent Current Long Term Stability Output Noise Voltage BW = 100 Hz to 10 KHz BW = 100 Hz to 10 KHz Cref = 0 Cref = 5 F Vi = 30 V Io = 0 mA 2.3 0.1 20 2.5 Cref = 0 Cref = 5 F Min. Typ. 0.01 0.02 -55 C Tamb 125 C 0.03 -55 C Tamb 125 C 6.95 7.15 74 86 150 65 40 37 38 5 o o o o Max. 0.1 0.2 0.3 0.15 0.6 7.35 Unit % % % % % V dB dB ppm/ oC mA V V V mA %/1000 hrs V V V o/V i Line Regulation Vo /V o Load Regulation V REF SVR Reference Voltage Supply Voltage Rejection V o /T Output Voltage Drift I sc Vi Vo V o -V i Id K VH eN Output Current Limit Input Voltage Range Output Voltage Range ELECTRICAL CHARACTERISTICS FOR LM723C (refer to the test circuits, Tamb = 25 oC, unless otherwise specified) Symbol Parameter Test Conditions Vi = 12 to 15V Vi = 12 to 40V Vi = 12 to 15V Io = 1 to 50 mA Io = 1 to 10 mA Iref = 160 A f = 100 Hz to 10 KHz f = 100 Hz to 10 KHz Rsc = 10 Vo = 0 9.5 2 3 Quiescent Current Long Term Stability Output Noise Voltage BW = 100 Hz to 10 KHz BW = 100 Hz to 10 KHz Cref = 0 Cref = 5 F Vi = 30 V Io = 0 mA 2.3 0.1 20 2.5 Cref = 0 Cref = 5 F Min. Typ. 0.01 0.1 0oC Tamb 70oC 0.03 0 C Tamb 70 C 6.8 7.15 74 86 150 65 40 37 38 4 o o Max. 0.1 0.5 0.3 0.2 0.6 7.5 Unit % % % % % V dB dB ppm/ oC mA V V V mA %/1000 hrs V V V o/V i Line Regulation Vo /V o Load Regulation V REF SVR Reference Voltage Supply Voltage Rejection V o /T Output Voltage Drift I sc Vi Vo V o -V i Id K VH eN Output Current Limit Input Voltage Range Output Voltage Range 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 (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 Applicable Figures Fixed Output 5% 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 Output Adjustable 10% * 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 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 O utputs from +7 to +37V F ig.14, 16, 17, 18, 21, 23 R1 + R2 V O = [ Vref x ] Outputs from +4 to +250V Fig.19 Vr ef R2 - R 1 x ; R3 = R 4 VO = R1 2 Outputs from -6 to -250V Fig.15, 20 Vr ef R1 + R 2 ; R = R4 VO = x R1 3 2 Current Limiting I LIMI T = VSENSE R sc R2 Foldback Current Limiting VO R3 VSENSE (R3 + R4) IKNEE = x R sc R4 R sc R4 I SHORT CKT VSENSE R 3 + R4 = x R4 Rsc 6/12 LM723 APPLICATION INFORMATION (pin numbers relative to the plastic package). Figure 13 : Basic Low Voltage Regulator (Vo = 2 to 7V). Figure 14 : Basic High Voltage Regulator (Vo = 7 to 37V). R1 x 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 = R1 x 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 15 : Negative Voltage Regulator. Figure 16 : Positive Voltage Regulator (external Typical performance Regulated Output Voltage .................... ............... ...............15V 1 Line Regulation (Vi = 3V)............. ................. ................. .. mV Load Regulation (IO = 100mA) ..................... ................. ..2mV 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) Figure 18 : Foldback current limiting Typical performance Regulated Output Voltage.......................... ................. .........5V Line Regulation (Vi = 3V) ......................... ................. ...0.5mV Load Regulation (IO = 1 A) .................. ............... ..........1.5mV Typical performance Regulated Output Voltage......................... ................. ......... 5 V Line Regulation (Vi = 3V).............. ................. .............. 0.5mV Load Regulation (IO = 10mA).................. ................. ....... 1mV Current Limit Knee..................... ............... ................. ....20 mA Figure 19 : Positive Floating Regulator Figure 20 : Negative Floating Regulator Typical performance Regulated Output Voltage .................... ............... ............100 V Line Regulation (Vi = 20V)............................ ............... 15 mV Load Regulation (IO = 50mA) ....................... ............ ... 20 mV Typical performance Regulated Output Voltage............... ................. ............ - 100 V Line Regulation (Vi = 20V)...................... ................. .... 30 mV Load Regulation (IO = 100 mA)............... ................. .... 20 mV 8/12 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 Typical performance Regulated Output Voltage......................... ................. ......... 5 V Line Regulation (Vi = 3 V) ....................... ................. ... 0.5 mV Load Regulation (IO = 50 mA)............ ................. ........ 1.5 mV Figure 23 : Shunt Regulator. 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 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 inch TYP. MAX. DIM. P001A 10/12 LM723 SO-14 MECHANICAL DATA DIM. MIN. 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 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 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. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a trademark of STMicroelectronics (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. . 12/12 |
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