LM140L/LM340L Series 3-Terminal Positive Regulators General Description The LM140L series of three terminal positive regulators is available with several fixed output voltages making them useful in a wide range of applications. The LM140LA is an improved version of the LM78LXX series with a tighter output voltage tolerance (specified over the full military temperature range), higher ripple rejection, better regulation and lower quiescent current. The LM140LA regulators have g 2% VOUT specification, 0.04%/V line regulation, and 0.01%/mA load regulation. When used as a zener diode/resistor combination replacement, the LM140LA usually results in an effective output impedance improvement of two orders of magnitude, and lower quiescent current. These regulators can provide local on card regulation, eliminating the distribution problems associated with single point regulation. The voltages available allow the LM140LA to be used in logic systems, instrumentation, Hi-Fi, and other solid state electronic equipment. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. The LM140LA/LM340LA are available in the low profile metal three lead TO-39 (H) and the LM340LA are also available in the plastic TO-92 (Z). With adequate heat sinking the regulator can deliver 100 mA output current. Current limiting is included to limit the peak output current to a safe value. Safe area protection for the output transistor is provided to limit internal power dissipation. If internal power dissipation becomes too high for the heat sinking provided, the thermal shut-down circuit takes over, preventing the IC from overheating. For applications requiring other voltages, see LM117L Data Sheet. Features Y Y Y Y Y Y Y Y Line regulation of 0.04%/V Load regulation of 0.01%/mA Output voltage tolerances of g 2% at Tj e 25§ C and g 4% over the temperature range (LM140LA) g 3% over the temperature range (LM340LA) Output current of 100 mA Internal thermal overload protection Output transistor safe area protection Internal short circuit current limit Available in metal TO-39 low profile package (LM140LA/LM340LA) and plastic TO-92 (LM340LA) Output Voltage Options LM140LA-5.0 LM140LA-12 LM140LA-15 5V 12V 15V LM340LA-5.0 LM340LA-12 LM340LA-15 5V 12V 15V Connection Diagrams TO-39 Metal Can Package (H) TL/H/7782 – 2 Bottom View Order Number LM140LAH-5.0, LM140LAH-5.0/883, LM140LAH-12, LM140LAH-12/883, LM140LAH-15, LM140LAH-15/883, LM340LAH-5.0, LM340LAH-12 or LM340LAH-15 See NS Package Number H03A TO-92 Plastic Package (Z) TL/H/7782 – 3 Bottom View Order Number LM340LAZ-5.0, LM340LAZ-12 or LM340LAZ-15 See NS Package Number Z03A C1995 National Semiconductor Corporation TL/H/7782 RRD-B30M115/Printed in U. S. A. LM140L/LM340L Series 3-Terminal Positive Regulators February 1995 Absolute Maximum Ratings Operating Temperature Range LM140LA LM340LA If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. (Note 4) Input Voltage 35V Internal Power Dissipation (Note 1) Internally Limited b 55§ C to a 125§ C 0§ C to a 70§ C a 150§ C Maximum Junction Temperature Storage Temperature Range Metal Can (H package) Molded TO-92 b 65§ C to a 150§ C b 55§ C to a 150§ C Lead Temperature (Soldering, 10 sec.) Metal Can Plastic TO-92 a 300§ C a 230§ C Electrical Characteristics Test conditions unless otherwise specified. TA e b55§ C to a 125§ C (LM140LA), TA e 0§ C to a 70§ C (LM340LA), IO e 40 mA, CIN e 0.33 mF, CO e 0.01 mF. Symbol VO DVO Output Voltage Option 5.0V 12V 15V Input Voltage (unless otherwise noted) 10V 19V 23V Parameter Conditions Min Typ Max Output Voltage Tj e 25§ C Output Voltage Over Temp. (Note 3) LM140LA IO e 1 b 100 mA 4.8 LM340LA IO e 1 b 100 mA or IO e 1 b 40 mA and VIN e ( )V 4.85 Line Regulation 4.9 Tj e 25§ C Load Regulation Tj e 25§ C DIQ 5.2 IO e 40 mA VIN e ( )V 30 15.3 15.6 (17.6 – 30) V 15.45 (17.5 – 30) 65 30 (7.5 – 25) 15 12.35 14.55 30 30 Typ Max 14.4 37 (14.2 – 30) 18 70 (17.3 – 30) 65 37 (14.5 – 30) 70 5 20 10 40 12 50 40 30 80 35 100 24 4.5 3 4.2 mV 1000 hrs 30 4.5 3.1 4.2 4.5 0.1 0.1 0.1 DLine VIN e ( )V 0.5 0.5 0.5 Tj e 25§ C (Note 2) f e 10 Hz–10 kHz DVIN DVOUT Ripple Rejection f e 120 Hz, VIN e ( )V 55 (7.5 – 25) (14.3 – 30) (17.5 – 30) 40 80 90 62 (7.5 – 18) Tj e 25§ C, IO e 40 mA 7 47 54 (14.5 – 25) 14.2 mA 4.2 DLoad IO e 1 b 40 mA Output Noise Voltage mV (17.5 – 30) 20 3 VN Input Voltage Required to Maintain Line Regulation 12.5 (14.3 – 27) 12 Quiescent Tj e 25§ C Current Change Min 12.25 14.7 (14.5 – 27) (7 – 25) Tj e 25§ C Tj e 125§ C 12 5.15 11.65 18 IO e 1 b 40 mA IO e 1 b 100 mA Typ Max 11.5 (7 – 20) Long Term Stability Quiescent Current Min 5.1 11.75 (7.2 – 20) IO e 100 mA VIN e ( )V IO 5 Units 45 52 mA mV dB (17.5 – 28.5) 17.3 V Note 1: Thermal resistance of H-package is typically 26§ C/W ijC, 250§ C/W ijA still air, and 94§ C/W ijA 400 lf/min of air. For the Z-package is 60§ C/W ijC, 232§ C/ W ijA still air, and 88§ C/W ijA at 400 lf/min of air. The maximum junction temperature shall not exceed 125§ C on electrical parameters. Note 2: It is recommended that a minimum load capacitor of 0.01 mF be used to limit the high frequency noise bandwidth. Note 3: The temperature coefficient of VOUT is typically within 0.01% VO/§ C. Note 4: A military RETS specification is available upon request. At the time of printing, the LM140LA-5.0, -12, and -15 RETS specifications complied with the Min and Max limits in this table. The LM140LAH-5.0, LM140LAH-12, and LM140LAH-15 may also be procured as Standard Military Drawings. 2 Typical Performance Characteristics Maximum Average Power Dissipation Maximum Average Power Dissipation (Metal Can Package) Maximum Average Power Dissipation (Plastic Package) Peak Output Current Dropout Voltage Output Impedance Ripple Rejection Quiescent Current Quiescent Current TL/H/7782 – 4 Typical Applications Fixed Output Regulator Adjustable Output Regulator TL/H/7782 – 5 *Required if the regulator is located far from the power supply filter. **See note 3 in the electrical characteristics table. TL/H/7782 – 6 VOUT e 5V a (5V/R1 a IO) R2 5V/R1 e 3 IO load regulation (L,) [(R1 a R2)/R1] (L, of LM140LA-5.0) 3 Equivalent Circuit TL/H/7782 – 1 4 Physical Dimensions inches (millimeters) TO-39 Metal Can Package (H) Order Number LM140LAH-5.0, LM140LAH-5.0/883, LM140LAH-12, LM140LAH-12/883, LM140LAH-15, LM140LAH-15/883, LM340LAH-5.0, LM340LAH-12 or LM340LAH-15 NS Package Number H03A 5 LM140L/LM340L Series 3-Terminal Positive Regulators Physical Dimensions inches (millimeters) (Continued) TO-92 Plastic Package (Z) Order Number LM340LAZ-5.0, LM340LAZ-12, or LM340LAZ-15 NS Package Number Z03A 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. As used herein: 1. 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