LM120/LM320 Series 3-Terminal Negative Regulators General Description The LM120 series are three-terminal negative regulators with a fixed output voltage of b5V, b12V, and b15V, and up to 1.5A load current capability. Where other voltages are required, the LM137 and LM137HV series provide an output voltage range of b1.2V to b47V. The LM120 need only one external componentÐa compensation capacitor at the output, making them easy to apply. Worst case guarantees on output voltage deviation due to any combination of line, load or temperature variation assure satisfactory system operation. Exceptional effort has been made to make the LM120 Series immune to overload conditions. The regulators have current limiting which is independent of temperature, combined with thermal overload protection. Internal current limiting protects against momentary faults while thermal shutdown prevents junction temperatures from exceeding safe limits during prolonged overloads. Although primarily intended for fixed output voltage applications, the LM120 Series may be programmed for higher output voltages with a simple resistive divider. The low quiescent drain current of the devices allows this technique to be used with good regulation. Features Y Y Y Y Y Y Y Preset output voltage error less than g 3% Preset current limit Internal thermal shutdown Operates with input-output voltage differential down to 1V Excellent ripple rejection Low temperature drift Easily adjustable to higher output voltage LM120 Series Packages and Power Capability Device LM120/LM320 Package Rated Power Dissipation Design Load Current TO-3 (K) 20W 1.5A TO-39 (H) 2W 0.5A LM320 TO-220 (T) 15W 1.5A LM320M TO-202 (P) 7.5W 0.5A Typical Applications Dual Trimmed Supply Fixed Regulator TL/H/7767 – 2 *Required if regulator is separated from filter capacitor by more than 3× . For value given, capacitor must be solid tantalum. 25 mF aluminum electrolytic may be substituted. ² Required for stability. For value given, capacitor must be solid tantalum. 25 mF aluminum electrolytic may substituted. Values given may be increased without limit. For output capacitance in excess of 100 mF, a high current diode from input to output (1N4001, etc.) will protect the regulator from momentary input shorts. TL/H/7767–3 C1995 National Semiconductor Corporation TL/H/7767 RRD-B30M115/Printed in U. S. A. LM120/LM320 Series 3-Terminal Negative Regulators November 1994 2 Line Regulation TJ e 25§ C, VIN e 10V, 5 mA s ILOAD s ID b 7.5V s VIN s VMAX, 5 mA s ILOAD s ID, P s PD VMIN s VIN s VMAX TJ e 25§ C VMIN s VIN s VMAX 5 mA s ILOAD s ID TA e 25§ C, CL e 1 mF, IL e 5 mA, VIN e 10V, 10 Hz s f s 100 kHz Load Regulation, (Note 2) Output Voltage, (Note 1) Quiescent Current Quiescent Current Change Output Noise Voltage 5 150 0.1 0.1 1 50 64 10 b5 Typ 54 b 25 b 5.2 Min 3 35 50 0.4 0.4 2 b 4.80 b 5.25 75 b7 25 b 4.9 Max 5 150 0.1 0.1 1 60 64 10 b5 Typ 1.5A 20W 54 b 25 b 5.1 Min 5 150 0.05 0.04 1 54 bb 25 b 5.2 Min Note 4 Note 4 50 0.4 0.4 2 5 150 0.05 0.04 1 30 64 10 b5 Typ 0.5A 2W 54 b 25 b 5.2 Min Note 4 Note 4 50 0.4 0.4 2 4 50 10 150 0.1 0.1 1 50 64 10 b5 Typ 1.5A 15W 0.4 0.4 b 4.75 100 b 7.5 40 b 4.8 Max LM320T-5.0 (TO-220) Power Plastic Package b 4.75 b 5.25 50 b7 40 b 4.8 Max LM320H-5.0 (TO-39) b 4.80 b 5.25 50 b7 25 b 4.9 Max 300§ C 260§ C § C/W § C/W mV mV mA mA mA V mV dB V mV V Units Note 5: Refer to RETS120-5H drawing for LM120H-5.0 or RETS120-5K drawing for LM120-5K military specifications. Note 4: Thermal resistance of typically 85§ C/W (in 400 linear feet air flow), 224§ C/W (in static air) junction to ambient, of typically 21§ C/W junction to case. Note 3: For b 5V 3 amp regulators, see LM145 data sheet. Note 2: Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320 series does have low thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical specifications apply only up to PD. 3 35 50 0.4 0.4 2 30 64 10 b5 Typ 0.5A 2W LM120H-5.0 (TO-39) b 4.75 b 5.20 100 b7 40 b 4.8 Max 25V See Note 1 b 65§ C to a 150§ C Metal Can Package LM320K-5.0 (TO-3) Note 1: This specification applies over b 55§ C s TJ s a 150§ C for the LM120 and 0§ C s TJ s a 125§ C for the LM320. Thermal Resistance Junction to Case Junction to Ambient Long Term Stability 54 f e 120 Hz Ripple Rejection b 5.20 b 25 b 5.1 Min Input Voltage VMIN s VIN s VMAX TJ e 25§ C, ILOAD e 5 mA, Output Voltage Conditions (Note 1) TJ e 25§ C, VIN e 10V, ILOAD e 5 mA 1.5A 20W Design Output Current (ID) Device Dissipation (PD) Parameter LM120K-5.0 (TO-3) Lead Temperature (Soldering, 10 sec.) Plastic Storage Temperature Range Input-Output Voltage Differential Junction Temperatures Order Numbers Electrical Characteristics If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. (Note 5) Power Dissipation Internally Limited b 25V Input Voltage Absolute Maximum Ratings b 5 Volt Regulators (Note 3) 3 Line Regulation TJ e 25§ C, VIN e 17V, 5 mA s ILOAD s ID 14.5V s VIN s VMAX, 5 mA s ILOAD s ID, P s PD VMIN s VIN s VMAX Load Regulation, (Note 2) Output Voltage, (Note 1) TA e 25§ C, CL e 1 mF, IL e 5 mA, VIN e 17V, 10 Hz s f s 100 kHz Output Noise Voltage Typ Max Min Typ 1A 20W Max Min Typ 0.2A 2W Max LM120H-12 (TO-39) Min Typ 0.2A 2W Max LM320H-12 (TO-39) Min b 12.5 56 b 32 12 400 0.1 0.1 2 30 80 4 10 56 b 32 3 35 120 0.4 0.4 4 b 11.5 b 12.6 80 b 14 12 400 0.1 0.1 2 30 80 4 20 56 b 32 12 400 0.05 0.03 2 10 80 4 10 56 b 32 Note 3 Note 3 120 0.4 0.4 4 b 11.5 b 12.6 25 b 14 12 400 0.05 0.03 2 10 80 4 20 56 b 32 Note 3 Note 3 120 0.4 0.4 4 b 11.4 b 12.6 40 b 14 4 50 24 400 0.1 0.1 2 30 80 4 0.4 0.4 4 b 11.4 80 b 14.5 20 b 11.6 Max § C/W § C/W mV mV mA mA mA V mV dB V mV V Units Note 4: Refer to RETS120H-12 drawing for LM120H-12 or RETS120-12K drawing for LM120K-12 military specifications. Note 3: Thermal resistance of typically 85§ C/W (in 400 linear feet/min air flow), 224§ C/W (in static air) junction to ambient, of typically 21§ C/W junction to case. Note 2: Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320 series does have low thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical specifications apply only up to PD. 3 35 120 0.4 0.4 4 b 11.4 b 12.5 80 b 14 b 12 Typ 1A 15W LM320T-12 (TO-220) Power Plastic Package b 12.3 b 12 b 11.7 b 12.4 b 12 b 11.6 b 12.3 b 12 b 11.7 b 12.4 b 12 b 11.6 b 12.4 Min 30V See Note 1 b 65§ C to a 150§ C 300§ C Metal Can Package LM320K-12 (TO-3) Note 1: This specification applies over b 55§ C s TJ s a 150§ C for the LM120 and 0§ C s TJ s a 125§ C for the LM320. Thermal Resistance Junction to Case Junction to Ambient Long Term Stability TJ e 25§ C VMIN s VIN s VMAX 5 mA s ILOAD s ID Quiescent Current Change Quiescent Current f e 120 Hz Ripple Rejection Input Voltage VMIN s VIN s VMAX TJ e 25§ C, ILOAD e 5 mA, Output Voltage Conditions (Note 1) TJ e 25§ C, VIN e 17V, ILOAD e 5 mA 1A 20W Design Output Current (ID) Device Dissipation (PD) Parameter LM120K-12 (TO-3) Input-Output Voltage Differential Junction Temperatures Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Order Numbers Electrical Characteristics If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. (Note 4) Power Dissipation Internally Limited b 35V Input Voltage Absolute Maximum Ratings b 12 Volt Regulators 4 TJ e 25§ C, ILOAD e 5 mA, VMIN s VIN s VMAX Line Regulation TJ e 25§ C, VIN e 20V, 5 mA s ILOAD s ID 17.5V s VIN s VMAX, 5 mA s ILOAD s ID, P s PD VMIN s VIN s VMAX TJ e 25§ C VMIN s VIN s VMAX 5 mA s ILOAD s ID TA e 25§ C, CL e 1 mF, IL e 5 mA, VIN e 20V, 10 Hz s f s 100 kHz Load Regulation, (Note 2) Output Voltage, (Note 1) Quiescent Current Quiescent Current Change Output Noise Voltage Typ Max Min Typ Max Min Typ 0.2A 2W Max LM120H-15 (TO-39) 300§ C Min Typ 0.2A 2W Max LM320H-15 (TO-39) Min b 15.5 56 b 35 15 400 0.1 0.1 2 30 80 5 56 b 35 3 35 150 0.4 0.4 4 b 14.5 b 15.6 80 b 17 10 15 400 0.1 0.1 2 30 80 5 56 b 35 15 400 0.05 0.03 2 10 80 5 56 b 35 Note 3 Note 3 150 0.4 0.4 4 b 14.5 b 15.6 25 b 17 10 15 400 0.05 0.03 2 10 80 5 56 b 35 Note 3 Note 3 150 0.4 0.4 4 b 14.4 b 15.7 40 b 17 20 4 50 30 400 0.1 0.1 2 30 80 5 Max 0.4 0.4 4 b 14.3 80 b 17.5 20 b 14.5 § C/W § C/W mV mV mA mA mA V mV dB V mV V Units Note 4: Refer to RETS120-15H drawing for LM120H-15 or RETS120-15K drawing for LM120K-15 military specifications. Note 3: Thermal resistance of typically 85§ C/W (in 400 linear feet/min air flow), 224§ C/W (in static air) junction to ambient, of typically 21§ C/W junction to case. Note 2: Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320 series does have low thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical specifications apply only up to PD. 3 35 150 0.4 0.4 4 b 14.4 b 15.5 80 b 17 20 b 15 Typ 1A 15W LM320T-15 (TO-220) Power Plastic Package b 15.3 b 15 b 14.7 b 15.4 b 15 b 14.6 b 15.3 b 15 b 14.7 b 15.4 b 15 b 14.6 b 15.5 Min 1A 20W 30V See Note 1 b 65§ C to a 150§ C Metal Can Package LM320K-15 (TO-3) Note 1: This specification applies over b 55§ C s TJ s a 150§ C for the LM120 and 0§ C s TJ s a 125§ C for the LM320. Thermal Resistance Junction to Case Junction to Ambient Long Term Stability f e 120 Hz Ripple Rejection Input Voltage Output Voltage Conditions (Note 1) TJ e 25§ C, VIN e 20V, ILOAD e 5 mA 1A 20W Design Output Current (ID) Device Dissipation (PD) Parameter LM120K-15 (TO-3) Lead Temperature (Soldering, 10 sec.) Storage Temperature Range Input-Output Voltage Differential Junction Temperatures Order Numbers Electrical Characteristics If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. (Note 4) Power Dissipation Internally Limited Input Voltage b 40V LM120/LM320 b 35V LM320T Absolute Maximum Ratings b 15 Volt Regulators Typical Performance Characteristics Output Voltage vs Temperature Ripple Rejection (All Types) Output Impedance TO-3 and TO-220 Packages Output Impedance TO-5 and TO-202 Packages Minimum Input-Output Differential TO-3 and TO-220 Packages Minimum Input-Output Differential TO-5 and TO-202 Packages Quiescent Current vs Input Voltage Quiescent Current vs Load Current Maximum Average Power Dissipation (TO-3) TL/H/7767 – 4 *These curves for LM120. Derate 25§ C further for LM320. 5 Typical Performance Characteristics Maximum Average Power Dissipation (TO-5) (Continued) Maximum Average Power Dissipation (TO-202) Maximum Average Power Dissipation (TO-220) Short Circuit Current TL/H/7767 – 5 Typical Applications (Continued) High Stability 1 Amp Regulator TL/H/7767 – 6 Lead and line regulation Ð 0.01% temperature stability Ð 0.2% ² Determines Zener current. ² ² Solid tantalum. An LM120-12 or LM120-15 may be used to permit higher input voltages, but the regulated output voltage must be at least b 15V when using the LM120-12 and b 18V for the LM120-15. **Select resistors to set output voltage. 2 ppm/§ C tracking suggested. 6 Typical Applications (Continued) Wide Range Tracking Regulator Current Source *IOUT e 1 mA a 5.0V R1 TL/H/7767 – 8 TL/H/7767 – 7 g 15V, 1 Amp Tracking Regulators *Resistor tolerance of R1 and R2 determine matching of ( a ) and ( b ) inputs. **Necessary only if raw supply capacitors are more than 3× from regulators An LM3086N array may substitute for Q1, D1 and D2 for better stability and tracking. In the array diode transistors Q5 and Q4 (in parallel) make up D2; similarly, Q1 and Q2 become D1 and Q3 replaces the 2N2222. Variable Output TL/H/7767 – 9 Performance (Typical) *Optional. Improves transient response and ripple rejection. VOUT e VSET Load Regulation at DIL e 1A Output Ripple, CIN e 3000 mF, IL e 1A Temperature Stability Output Noise 10 Hz s f s 10 kHz R1 a R2 R2 SELECT R2 AS FOLLOWS: LM120-5 LM120-12 LM120-15 10 mV 100 mVrms a 50 mV 150 mVrms TL/H/7767 – 12 1 mV 100 mVrms a 50 mV 150 mVrms *Resistor tolerance of R4 and R5 determine matching of ( a ) and ( b ) outputs. b 300X b 750X b 1k **Necessary only if raw supply filter capacitors are more than 2× from regulators. Light Controllers Using Silicon Photo Cells TL/H/7767 – 11 *Lamp brightness increases until iI e iQ (1 mA) a 5V/R1. TL/H/7767 – 10 ² Necessary only if raw supply filter capacitor is more than 2× from LM320. *Lamp brightness increases until iI e 5V/R1 (iI can be set as low as 1 mA). ² Necessary only of raw supply filter capacitor is more than 2× from LM320MP. 7 Connection Diagrams TL/H/7767–13 TL/H/7767 – 14 Bottom View Bottom View Metal Can Package TO-39 (H) Order Number LM120H-5.0, LM120H-12, LM120H-15, LM120H-5.0/883, LM120H-12/883, LM120H-15/883, LM320H-5.0, LM320H-12 or LM320H-15 See NS Package Number H03A Steel Metal Can Package TO-3 (K) Order Number LM120K-5.0/883, LM120K-12/883, LM120K-15/883, LM320K-5.0, LM320K-12 or LM320K-15 See NS Package Number K02A TL/H/7767 – 17 Front View Power Package TO-220 (T) Order Number LM320T-5.0, LM320T-12 or LM320T-15 See NS Package Number T03B Schematic Diagrams b 5V TL/H/7767 – 18 8 Schematic Diagrams (Continued) b 12V and b 15V TL/H/7767 – 19 Physical Dimensions inches (millimeters) Metal Can Package (TO-39) (H) Order Number LM120H-5.0, LM120H-12, LM120H-15, LM320H-5.0, LM320H-12 or LM320H-15 NS Package Number H03A 9 Physical Dimensions inches (millimeters) (Continued) Steel Metal Can Package TO-3 (K) Order Number LM120K-5.0, LM120K-12, LM120K-15, LM320K-5.0, LM320K-12 or LM320K-15 NS Package Number K02A Aluminum Metal Can Package TO-3 (KC) Order Number LM320KC-5.0, LM320KC-12 or LM320KC-15 NS Package Number KC02A 10 Physical Dimensions inches (millimeters) (Continued) Power Package TO-202 (P) Order Number LM320MP-5.0, LM320MP-12 or LM320MP-15 NS Package Number P03A 11 LM120/LM320 Series 3-Terminal Negative Regulators Physical Dimensions inches (millimeters) (Continued) Power Package TO-220 (T) Order Number LM320T-5.0, LM320T-12 or LM320T-15 NS Package Number T03B LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. 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