LM120,LM320 LM120/LM320 Series 3-Terminal Negative Regulators Literature Number: SNVS756B LM120/LM320 Series 3-Terminal Negative Regulators drain current of the devices allows this technique to be used with good regulation. General Description The LM120 series are three-terminal negative regulators with a fixed output voltage of -5V, -12V, and -15V, and up to 1.5A load current capability. Where other voltages are required, the LM137 and LM137HV series provide an output voltage range of -1.2V to -47V. The LM120 need only one external component--a 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 Features Preset output voltage error less than 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 Package Rated Power Dissipation Design Load Current LM120/LM320 TO-3 (K) LM320 20W 1.5A TO-39 (H) 2W 0.5A TO-220 (T) 15W 1.5A Typical Applications Dual Trimmed Supply 776703 Fixed Regulator *Required if regulator is separated from filter capacitor by more than 3 inches. For value given, capacitor must be solid tantalum. 25 F aluminum electrolytic may be substituted. Required for stability. For value given, capacitor must be solid tantalum. 25 F aluminum electrolytic may be substituted. Values given may be increased without limit. For output capacitance in excess of 100 F, a high current diode from input to output (1N4001, etc.) will protect the regulator from momentary input shorts. 776702 (c) 2010 National Semiconductor Corporation 7767 www.national.com LM120/LM320 Series 3-Terminal Negative Regulators August 11, 2010 LM120/LM320 Absolute Maximum Ratings -5 Volt Regulators (Note 5, Note 3) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input Voltage Input-Output Voltage Differential Junction Temperatures Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Plastic Internally Limited -25V 25V (Note 1) -65C to +150C 300C 260C LM120K-5.0 and LM320K-5.0 Electrical Characteristics (Note 3) Metal Can Package Order Numbers LM120K-5.0 (TO-3) LM320K-5.0 (TO-3) Design Output Current (ID) Device Dissipation (PD) Conditions (Note 1) Parameter Output Voltage Units 1.5A 20W TJ = 25C, VIN =10V, Min Typ Max Min Typ Max -5.1 -5 -4.9 -5.2 -5 -4.8 V 10 25 10 40 mV ILOAD = 5 mA Line Regulation TJ = 25C, ILOAD = 5 mA, VMIN VIN VMAX Input Voltage -25 Ripple Rejection f = 120 Hz Load Regulation, TJ = 25C, VIN = 10V, (Note 2) 5 mA ILOAD ID Output Voltage, -7.5V VIN VMAX, (Note 1) 5 mA ILOAD ID, P PD Quiescent Current VMIN VIN VMAX Quiescent Current TJ = 25C Change Output Noise Voltage 54 -7 64 50 -5.20 -25 54 75 -4.80 -7 64 60 -5.25 V dB 100 mV -4.75 V 1 2 1 2 mA VMIN VIN VMAX 0.1 0.4 0.1 0.4 mA 5 mA ILOAD ID 0.1 0.4 0.1 0.4 mA TA = 25C, CL = 1 F, IL = 5 mA, 150 V 150 VIN = 10V, 10 Hz f 100 kHz Long Term Stability 5 Thermal Resistance Junction to Case Junction to Ambient www.national.com 50 3 35 2 5 50 mV 3 35 C/W C/W LM120/LM320 LM120H-5.0 Electrical Characteristics (Note 3) Metal Can Package Order Numbers LM120H-5.0 (TO-39) Design Output Current (ID) Device Dissipation (PD) 0.5A 2W Conditions (Note 1) Parameter Output Voltage TJ = 25C, VIN =10V, Units Min Typ Max -5.1 -5 -4.9 V 10 25 mV ILOAD = 5 mA Line Regulation TJ = 25C, ILOAD = 5 mA, VMIN VIN VMAX Input Voltage -25 Ripple Rejection f = 120 Hz Load Regulation, TJ = 25C, VIN = 10V, (Note 2) 5 mA ILOAD ID Output Voltage, -7.5V VIN VMAX, (Note 6) 5 mA ILOAD ID, P PD Quiescent Current VMIN VIN VMAX Quiescent Current TJ = 25C Change Output Noise Voltage -7 54 64 30 V dB 50 mV -4.80 V 1 2 mA VMIN VIN VMAX 0.05 0.4 mA 5 mA ILOAD ID 0.04 0.4 mA -5.20 TA = 25C, CL = 1 F, IL = 5 mA, 150 V 5 mV VIN = 10V, 10 Hz f 100 kHz Long Term Stability Thermal Resistance Junction to Case Junction to Ambient (Note 4) (Note 4) C/W C/W Note 1: This specification applies over -55C TJ +150C for the LM120 and 0C TJ +125C for the LM320. 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. Note 3: For -5V 3 amp regulators, see LM145 data sheet. Note 4: Thermal resistance of typically 85C/W (in 400 linear feet air flow), 224C/W (in static air) junction to ambient, of typically 21C/W junction to case. Note 5: Refer to RETS120-5H drawing for LM120H-5.0 or RETS120-5K drawing for LM120-5K military specifications. 3 www.national.com LM120/LM320 Absolute Maximum Ratings -12 Volt Regulators (Note 9) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input Voltage Input-Output Voltage Differential Junction Temperatures Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Internally Limited -35V 30V (Note 6) -65C to +150C 300C LM120K-12 Electrical Characteristics Metal Can Package Order Numbers Design Output Current (ID) 1A Device Dissipation (PD) 20W Conditions (Note 6) Parameter Output Voltage Units LM120K-12 (TO-3) TJ = 25C, VIN = 17V, Min Typ Max -12.3 -12 -11.7 V 4 10 mV -14 V 80 mV -11.5 V 2 4 mA ILOAD = 5 mA Line Regulation TJ = 25C, ILOAD = 5 mA, VMIN VIN VMAX Input Voltage -32 Ripple Rejection f = 120 Hz Load Regulation, TJ = 25C, VIN = 17V, (Note 7) 5 mA ILOAD ID Output Voltage, 14.5V VIN VMAX, (Note 6) 5 mA ILOAD ID, P PD Quiescent Current VMIN VIN VMAX Quiescent Current TJ = 25C Change VMIN VIN VMAX 0.1 0.4 mA 5 mA ILOAD ID 0.1 0.4 mA TA = 25C, CL = 1 F, IL = 5 mA, 400 Output Noise Voltage 56 80 30 -12.5 dB V VIN = 17V, 10 Hz f 100 kHz Long Term Stability 12 Thermal Resistance Junction to Case Junction to Ambient www.national.com 4 120 mV 3 35 C/W C/W LM120/LM320 LM120H-12 Electrical Characteristics Metal Can Package Order Numbers LM120H-12 (TO-39) Design Output Current (ID) 0.2A Device Dissipation (PD) Output Voltage 2W Conditions (Note 6) Parameter Units TJ = 25C, VIN = 17V, Min Typ Max -12.3 -12 -11.7 V 4 10 mV -14 V 25 mV -11.5 V 2 4 mA ILOAD = 5 mA Line Regulation TJ = 25C, ILOAD = 5 mA, VMIN VIN VMAX Input Voltage -32 Ripple Rejection f = 120 Hz Load Regulation, TJ = 25C, VIN = 17V, (Note 7) 5 mA ILOAD ID Output Voltage, 14.5V VIN VMAX, (Note 6) 5 mA ILOAD ID, P PD Quiescent Current VMIN VIN VMAX Quiescent Current TJ = 25C Change VMIN VIN VMAX 0.05 0.4 mA 5 mA ILOAD ID 0.03 0.4 mA TA = 25C, CL = 1 F, IL = 5 mA, 400 Output Noise Voltage 56 80 10 -12.5 dB V VIN = 17V, 10 Hz f 100 kHz Long Term Stability 12 Thermal Resistance Junction to Case Junction to Ambient 5 120 mV (Note 8) (Note 8) C/W C/W www.national.com LM120/LM320 LM320T-12 Electrical Characteristics Power Plastic Package Order Numbers LM320T-12 (TO-220) Design Output Current (ID) 1A Device Dissipation (PD) Output Voltage 15W Conditions (Note 6) Parameter Units TJ = 25C, VIN = 17V, Min Typ Max -12.4 -12 -11.6 V 4 20 mV -14.5 V 80 mV -11.4 V 2 4 mA ILOAD = 5 mA Line Regulation TJ = 25C, ILOAD = 5 mA, VMIN VIN VMAX Input Voltage -32 Ripple Rejection f = 120 Hz Load Regulation, TJ = 25C, VIN = 17V, (Note 7) 5 mA ILOAD ID Output Voltage, 14.5V VIN VMAX, (Note 6) 5 mA ILOAD ID, P PD Quiescent Current VMIN VIN VMAX Quiescent Current TJ = 25C Change VMIN VIN VMAX 0.1 0.4 mA 5 mA ILOAD ID 0.1 0.4 mA TA = 25C, CL = 1 F, IL = 5 mA, 400 V Long Term Stability 24 mV Thermal Resistance Junction to Case Junction to Ambient 4 50 C/W C/W Output Noise Voltage 56 80 30 -12.6 dB VIN = 17V, 10 Hz f 100 kHz Note 6: This specification applies over -55C TJ +150C for the LM120 and 0C TJ +125C for the LM320. Note 7: 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. Note 8: Thermal resistance of typically 85C/W (in 400 linear feet/min air flow), 224C/W (in static air) junction to ambient, of typically 21C/W junction to case. Note 9: Refer to RETS120H-12 drawing for LM120H-12 or RETS120-12K drawing for LM120K-12 military specifications. www.national.com 6 LM120/LM320 Absolute Maximum Ratings -15 Volt Regulators (Note 13) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input Voltage LM120/LM320 LM320T Input-Output Voltage Differential Junction Temperatures Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Internally Limited -40V -35V 30V (Note 10) -65C to +150C 300C LM120K-15 and LM320K-15 Electrical Characteristics Metal Can Package Order Numbers LM120K-15 (TO-3) LM320K-15 (TO-3) Design Output Current (ID) Device Dissipation (PD) Parameter Output Voltage Units 1A 20W Conditions (Note 10) TJ = 25C, VIN = 20V, Min Typ Max Min Typ Max -15.3 -15 -14.7 -15.4 -15 -14.6 V 5 10 5 20 mV -17 V 80 mV -14.4 V ILOAD = 5 mA Line Regulation TJ = 25C, ILOAD = 5 mA, VMIN VIN VMAX Input Voltage -35 Ripple Rejection f = 120 Hz Load Regulation, TJ = 25C, VIN = 20V, (Note 11) 5 mA ILOAD ID Output Voltage, 17.5V VIN VMAX, (Note 10) 5 mA ILOAD ID, P PD Quiescent Current VMIN VIN VMAX Quiescent Current TJ = 25C Change Output Noise Voltage 56 -17 80 30 -15.5 -35 56 80 -14.5 80 30 -15.6 dB 2 4 2 4 mA VMIN VIN VMAX 0.1 0.4 0.1 0.4 mA 5 mA ILOAD ID 0.1 0.4 0.1 0.4 mA TA = 25C, CL = 1 F, IL = 5 mA, 400 V 400 VIN = 20V, 10 Hz f 100 kHz Long Term Stability 15 Thermal Resistance Junction to Case Junction to Ambient 150 3 35 7 15 150 mV 3 35 C/W C/W www.national.com LM120/LM320 LM120H-15 Electrical Characteristics Metal Can Package Order Numbers LM120H-15 (TO-39) Design Output Current (ID) 0.2A Device Dissipation (PD) Output Voltage 2W Conditions (Note 10) Parameter Units TJ = 25C, VIN = 20V, Min Typ Max -15.3 -15 -14.7 V 5 10 mV -17 V 25 mV -14.5 V 2 4 mA ILOAD = 5 mA Line Regulation TJ = 25C, ILOAD = 5 mA, VMIN VIN VMAX Input Voltage -35 Ripple Rejection f = 120 Hz Load Regulation, TJ = 25C, VIN = 20V, (Note 11) 5 mA ILOAD ID Output Voltage, 17.5V VIN VMAX, (Note 10) 5 mA ILOAD ID, P PD Quiescent Current VMIN VIN VMAX Quiescent Current TJ = 25C Change VMIN VIN VMAX 0.05 0.4 mA 5 mA ILOAD ID 0.03 0.4 mA TA = 25C, CL = 1 F, IL = 5 mA, 400 Output Noise Voltage 56 80 10 -15.5 dB V VIN = 20V, 10 Hz f 100 kHz Long Term Stability 15 Thermal Resistance Junction to Case Junction to Ambient www.national.com 8 150 mV (Note 12) (Note 12) C/W C/W LM120/LM320 LM320T-15 Electrical Characteristics Power Plastic Package Order Numbers LM320T-15 (TO-220) Design Output Current (ID) 1A Device Dissipation (PD) Output Voltage 15W Conditions (Note 10) Parameter Units TJ = 25C, VIN = 20V, Min Typ Max -15.5 -15 -14.5 V 5 20 mV -17.5 V 80 mV -14.3 V 2 4 mA ILOAD = 5 mA Line Regulation TJ = 25C, ILOAD = 5 mA, VMIN VIN VMAX Input Voltage -35 Ripple Rejection f = 120 Hz Load Regulation, TJ = 25C, VIN = 20V, (Note 11) 5 mA ILOAD ID Output Voltage, 17.5V VIN VMAX, (Note 10) 5 mA ILOAD ID, P PD Quiescent Current VMIN VIN VMAX Quiescent Current TJ = 25C Change VMIN VIN VMAX 0.1 0.4 mA 5 mA ILOAD ID 0.1 0.4 mA TA = 25C, CL = 1 F, IL = 5 mA, 400 V Long Term Stability 30 mV Thermal Resistance Junction to Case Junction to Ambient 4 50 C/W C/W Output Noise Voltage 56 80 30 -15.7 dB VIN = 20V, 10 Hz f 100 kHz Note 10: This specification applies over -55C TJ +150C for the LM120 and 0C TJ +125C for the LM320. Note 11: 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. Note 12: Thermal resistance of typically 85C/W (in 400 linear feet/min air flow), 224C/W (in static air) junction to ambient, of typically 21C/W junction to case. Note 13: Refer to RETS120-15H drawing for LM120H-15 or RETS120-15K drawing for LM120K-15 military specifications. 9 www.national.com LM120/LM320 Typical Performance Characteristics Output Voltage vs Temperature Ripple Rejection (All Types) 776721 776720 Output Impedance TO-3 and TO-220 Packages Output Impedance TO-5 and TO-202 Packages 776722 776723 Minimum Input-Output Differential TO-3 and TO-220 Packages Minimum Input-Output Differential TO-5 and TO-202 Packages 776724 www.national.com 776725 10 LM120/LM320 Quiescent Current vs Input Voltage Quiescent Current vs Load Current 776727 776726 Maximum Average Power Dissipation (TO-3) Maximum Average Power Dissipation (TO-5) 776728 776729 *These curves for LM120. Derate 25C further for LM320. Maximum Average Power Dissipation (TO-202) Maximum Average Power Dissipation (TO-220) 776731 776730 11 www.national.com LM120/LM320 Short Circuit Current 776732 www.national.com 12 LM120/LM320 Typical Applications High Stability 1 Amp Regulator 776706 Lead and line regulation -- 0.01% temperature stability -- 0.2% Determines Zener current. 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 -15V when using the LM120-12 and -18V for the LM120-15. **Select resistors to set output voltage. 2 ppm/C tracking suggested. Wide Range Tracking Regulator 776707 *Resistor tolerance of R1 and R2 determine matching of (+) and (-) 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. 13 www.national.com LM120/LM320 Current Source 776708 Variable Output Current Source 776709 SELECT R2 AS FOLLOWS: LM120-5 300 LM120-12 750 LM120-15 1k *C3 optional. Improves transient response and ripple rejection. www.national.com 14 LM120/LM320 15V, 1 Amp Tracking Regulators 776712 Performance (Typical) Load Regulation at IL = 1A Output Ripple, CIN = 3000 F, IL = 1A Temperature Stability 10 mV 1 mV 100 Vrms 100 Vrms +50 mV Output Noise 10 Hz f 10 kHz 150 Vrms +50 mV 150 Vrms *Resistor tolerance of R4 and R5 determine matching of (+) and (-) outputs. **Necessary only if raw supply filter capacitors are more than 2 inches from regulators. 15 www.national.com LM120/LM320 Light Controllers Using Silicon Photo Cells 776710 *Lamp brightness increases until iI = 5V/R1 (iI can be set as low as 1 A). Necessary only if raw supply filter capacitor is more than 2 inches from LM320MP. 776711 *Lamp brightness increases until iI =iQ (1 mA) + 5V/R1. Necessary only if raw supply filter capacitor is more than 2 inches from LM320. www.national.com 16 LM120/LM320 Connection Diagrams 776717 776714 Front View Power Package TO-220 (T) Order Number LM320T-12 or LM320T-15 See NS Package Number T03B Bottom View Steel Metal Can Package TO-3 (K) Order Number LM120K-5.0/883, LM120K-12/883, LM120K-15/883, LM320K-5.0, LM320K-15 See NS Package Number K02A 776713 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 See NS Package Number H03A 17 www.national.com LM120/LM320 Schematic Diagrams -5V 776718 -12V and -15V 776719 www.national.com 18 LM120/LM320 Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (TO-39) (H) Order Number LM120H-5.0, LM120H-12, LM120H-15 NS Package Number H03A 19 www.national.com LM120/LM320 Steel Metal Can Package TO-3 (K) Order Number LM120K-5.0, LM120K-12, LM120K-15, LM320K-5.0, LM320K-15 NS Package Number K02A Power Package TO-220 (T) Order Number LM320T-12 or LM320T-15 NS Package Number T03B www.national.com 20 LM120/LM320 Notes 21 www.national.com LM120/LM320 Series 3-Terminal Negative Regulators Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Design Support Amplifiers www.national.com/amplifiers WEBENCH(R) Tools www.national.com/webench Audio www.national.com/audio App Notes www.national.com/appnotes Clock and Timing www.national.com/timing Reference Designs www.national.com/refdesigns Data Converters www.national.com/adc Samples www.national.com/samples Interface www.national.com/interface Eval Boards www.national.com/evalboards LVDS www.national.com/lvds Packaging www.national.com/packaging Power Management www.national.com/power Green Compliance www.national.com/quality/green Switching Regulators www.national.com/switchers Distributors www.national.com/contacts LDOs www.national.com/ldo Quality and Reliability www.national.com/quality LED Lighting www.national.com/led Feedback/Support www.national.com/feedback Voltage References www.national.com/vref Design Made Easy www.national.com/easy www.national.com/powerwise Applications & Markets www.national.com/solutions Mil/Aero www.national.com/milaero PowerWise(R) Solutions Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors SolarMagicTM www.national.com/solarmagic PLL/VCO www.national.com/wireless www.national.com/training PowerWise(R) Design University THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION ("NATIONAL") PRODUCTS. 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