LM340/LM78MXX Series 3-Terminal Positive Regulators General Description Features The LM140/LM340A/LM340/LM7800C monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.0A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents. Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply. The 5V, 12V, and 15V regulator options are available in the steel TO-3 power package. The LM340A/LM340/LM7800C series is available in the TO-220 plastic power package, and the LM340-5.0 is available in the SOT-223 package, as well as the LM340-5.0 and LM340-12 in the surface-mount TO-263 package. n Complete specifications at 1A load n Output voltage tolerances of 2% at Tj = 25C and 4% over the temperature range (LM340A) n Line regulation of 0.01% of VOUT/V of VIN at 1A load (LM340A) n Load regulation of 0.3% of VOUT/A (LM340A) n Internal thermal overload protection n Internal short-circuit current limit n Output transistor safe area protection n P+ Product Enhancement tested Output Voltages Device Packages LM140 5, 12, 15 TO-3 (K) LM340A/LM340 5, 12, 15 TO-3 (K), TO-220 (T), SOT-223 (MP), TO-263 (S) (5V and 12V only) LM7800C 5, 8, 12, 15 TO-220 (T) Typical Applications Fixed Output Regulator Adjustable Output Regulator DS007781-1 *Required if the regulator is located far from the power supply filter. **Although no output capacitor is needed for stability, it does help transient response. (If needed, use 0.1 F, ceramic disc). DS007781-2 VOUT = 5V + (5V/R1 + IQ) R2 5V/R1 > 3 IQ, load regulation (Lr) [(R1 + R2)/R1] (Lr of LM340-5). Current Regulator Comparison between SOT-223 and D-Pak (TO-252) Packages DS007781-3 IQ = 1.3 mA over line and load changes. DS007781-38 Scale 1:1 (c) 2000 National Semiconductor Corporation DS007781 www.national.com LM340/LM78MXX Series 3-Terminal Positive Regulators February 2000 LM340/LM78MXX Absolute Maximum Ratings (Note 1) Lead Temperature (Soldering, 10 sec.) TO-3 Package (K) TO-220 Package (T), TO-263 Package (S) ESD Susceptibility (Note 3) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 5) DC Input Voltage All Devices except LM7824/LM7824C LM7824/LM7824C Internal Power Dissipation (Note 2) Maximum Junction Temperature Storage Temperature Range 300C 230C 2 kV Operating Conditions (Note 1) 35V 40V Internally Limited 150C -65C to +150C Temperature Range (TA) (Note 2) LM140A, LM140 LM340A, LM340, LM7805C, LM7812C, LM7815C, LM7808C -55C to +125C 0C to +125C LM340A Electrical Characteristics IOUT = 1A, -55C TJ+150C (LM140A), or 0C TJ+ 125C (LM340A) unless otherwise specified (Note 4) Symbol Output Voltage 5V 12V Input Voltage (unless otherwise noted) 10V 19V Parameter VO VO Output Voltage Line Regulation Conditions Min Typ Max 5 Typ Max Min Typ 5.1 11.75 12 12.25 14.7 15 12.5 14.4 Units Max TJ = 25C 4.9 4.8 VMIN VIN VMAX (7.5 VIN 20) (14.8 VIN 27) (17.9 VIN 30) 10 18 22 (7.5 VIN 20) (14.8 VIN 27) (17.9 VIN 30) V 3 4 4 mV 5.2 IO = 500 mA TJ = 25C VIN 15.3 V 15.6 V 22 (17.5 VIN 30) 9 12 VIN 18 (14.5 VIN 27) 4 Over Temperature TJ = 25C 11.5 10 (7.5 VIN 20) TJ = 25C Load Regulation 23V Min PD 15W, 5 mA IO 1A VIN VO 15V 30 V mV V 10 mV 30 mV (8 VIN 12) (16 VIN 22) (20 VIN 26) V 10 12 12 35 mV 5 mA IO 1.5A 250 mA IO 750 mA Over Temperature, 25 32 15 19 21 mV 25 60 75 mV mA 5 mA IO 1A IQ IQ Quiescent Current Quiescent Current Change 6 6 6 Over Temperature TJ = 25C 6.5 6.5 6.5 mA 5 mA IO 1A 0.5 0.5 0.5 mA 0.8 mA TJ = 25C, IO = 1A VMIN VIN VMAX 0.8 0.8 (7.5 VIN 20) (14.8 VIN 27) 0.8 0.8 IO = 500 mA VMIN VIN VMAX VN Output Noise Voltage Ripple Rejection (17.9 VIN 30) 0.8 V mA (8 VIN 25) (15 VIN 30) (17.9 VIN 30) V 40 75 90 V 70 dB TA = 25C, 10 Hz f 100 kHz TJ = 25C, f = 120 Hz, IO = 1A 68 or f = 120 Hz, IO = 500 mA, 68 80 61 72 61 60 60 dB Over Temperature, RO VIN Dropout Voltage VMIN VIN VMAX (8 VIN 18) (15 VIN 25) (18.5 VIN 28.5) V TJ = 25C, IO = 1A 2.0 2.0 2.0 V Output Resistance f = 1 kHz 8 18 19 m Short-Circuit Current TJ = 25C 2.1 1.5 1.2 A Peak Output Current TJ = 25C 2.4 2.4 2.4 A Average TC of VO Min, TJ = 0C, IO = 5 mA -0.6 -1.5 -1.8 mV/C Input Voltage TJ = 25C Required to Maintain 7.5 Line Regulation www.national.com 2 14.5 17.5 V -55C TJ +150C unless otherwise specified Symbol Output Voltage 5V 12V Input Voltage (unless otherwise noted) 10V 19V Parameter VO Output Voltage Conditions Min Typ TJ = 25C, 5 mA IO 1A 4.8 5 PD 15W, 5 mA IO 1A 4.75 VMIN VIN VMAX VO Line Regulation IO = 500 mA TJ = 25C 3 VIN 11.4 12.5 14.4 15 12.6 14.25 (15.5 VIN 27) 50 4 (15 VIN 27) Units Max 15.6 15.75 V V (18.5 VIN 30) V 4 mV 120 120 (8 VIN 20) VIN 12 Typ 50 150 (17.5 VIN 30) 150 (18.5 VIN 30) 50 120 (7.5 VIN 20) (14.6 VIN 27) (17.7 VIN 30) 25 60 75 -55C TJ +150C TJ = 25C 11.5 Min (14.5 VIN 30) TJ = 25C VIN Load Regulation 5.2 5.25 23V Typ Max (7 VIN 25) -55C TJ +150C VO Min (8 VIN 20) VIN IO 1A Max 15V 150 V mV V mV V mV (8 VIN 12) (16 VIN 22) (20 VIN 26) V 10 12 12 150 mV 5 mA IO 1.5A 250 mA IP 750 mA 50 120 25 60 75 mV 50 120 150 mV TJ = 25C 6 6 6 mA -55C TJ +150C 7 7 7 mA -55C TJ +150C, 5 mA IO 1A IQ IQ Quiescent Current IO 1A Quiescent Current 5 mA IO 1A 0.5 0.5 0.5 mA Change TJ = 25C, IO 1A 0.8 0.8 0.8 mA VMIN VIN VMAX (8 VIN 20) IO = 500 mA, -55C TJ +150C VMIN VIN VMAX VN Output Noise Voltage f = 120 Hz (18.5 VIN 30) 0.8 0.8 V mA (8 VIN 25) (15 VIN 30) (18.5 VIN 30) V 40 75 90 V 70 dB TA = 25C, 10 Hz f 100 kHz Ripple Rejection (15 VIN 27) 0.8 IO 1A, TJ = 25C or 68 IO 500 mA, 68 80 61 72 61 60 60 dB -55C TJ +150C RO VIN VMIN VIN VMAX (8 VIN 18) (15 VIN 25) (18.5 VIN 28.5) V Dropout Voltage TJ = 25C, IO = 1A 2.0 2.0 2.0 V Output Resistance f = 1 kHz 8 18 19 m Short-Circuit Current TJ = 25C 2.1 1.5 1.2 A Peak Output Current TJ = 25C 2.4 2.4 2.4 A Average TC of VOUT 0C TJ +150C, IO = 5 mA -0.6 -1.5 -1.8 mV/C Input Voltage TJ = 25C, IO 1A Required to Maintain 7.5 14.6 17.7 V Line Regulation 3 www.national.com LM340/LM78MXX LM140 Electrical Characteristics (Note 4) LM340/LM78MXX LM340/LM7800C Electrical Characteristics (Note 4) 0C TJ +125C unless otherwise specified Symbol Output Voltage 5V 12V Input Voltage (unless otherwise noted) 10V 19V Parameter VO Output Voltage Conditions Min Typ TJ = 25C, 5 mA IO 1A 4.8 5 PD 15W, 5 mA IO 1A 4.75 VMIN VIN VMAX VO Line Regulation IO = 500 mA TJ = 25C 3 IO 1A Quiescent Current Change (14.5 VIN 27) 50 4 V V 4 mV 120 150 (17.5 VIN 30) 120 150 (15 VIN 27) V (17.5 VIN 30) (14.5 VIN 30) (18.5 VIN 30) 120 150 (14.6 VIN 27) (17.7 VIN 30) 60 75 V mV V mV V mV V mV 50 120 150 25 60 75 mV 50 120 150 mV mA 8 8 8 8.5 8.5 8.5 mA 0.5 0.5 0.5 mA mA 1.0 1.0 1.0 (14.8 VIN 27) (17.9 VIN 30) 1.0 1.0 (7 VIN 25) (14.5 VIN 30) (17.5 VIN 30) V 40 75 90 V 70 dB (7.5 VIN 20) 1.0 VMIN VIN VMAX 15.6 15.75 12 TJ = 25C, IO 1A TA = 25C, 10 Hz f 100 kHz f = 120 Hz 15 (20 VIN 26) 5 mA IO 1A Ripple Rejection 14.4 12.6 14.25 12 IO 500 mA, 0C TJ +125C Output Noise Voltage 12.5 (16 VIN 22) TJ = 25C VMIN VIN VMAX VN 12 11.4 10 0C TJ +125C IQ 11.5 Units Max (8 VIN 12) 5 mA IO 1.5A 250 mA IO 750 mA Quiescent Current 5.2 5.25 25 5 mA IO 1A, 0C TJ +125C IQ Typ (7.5 VIN 20) VIN TJ = 25C Min 50 0C TJ +125C Load Regulation Max (8 VIN 20) TJ = 25C VIN VO Typ 50 VIN IO 1A Min (7 VIN 25) 0C TJ +125C 23V Max (7.5 VIN 20) VIN 15V IO 1A, TJ = 25C 62 or IO 500 mA, 62 80 55 72 55 54 54 V mA dB 0C TJ +125C RO VIN VMIN VIN VMAX (8 VIN 18) (15 VIN 25) (18.5 VIN 28.5) Dropout Voltage TJ = 25C, IO = 1A 2.0 2.0 2.0 V Output Resistance f = 1 kHz 8 18 19 m A V Short-Circuit Current TJ = 25C 2.1 1.5 1.2 Peak Output Current TJ = 25C 2.4 2.4 2.4 A Average TC of VOUT 0C TJ +125C, IO = 5 mA -0.6 -1.5 -1.8 mV/C Input Voltage TJ = 25C, IO 1A Required to Maintain 7.5 14.6 17.7 V Line Regulation Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics. Note 2: The maximum allowable power dissipation at any ambient temperature is a function of the maximum junction temperature for operation (TJMAX = 125C or 150C), the junction-to-ambient thermal resistance (JA), and the ambient temperature (TA). PDMAX = (TJMAX - TA)/JA. If this dissipation is exceeded, the die temperature will rise above TJMAX and the electrical specifications do not apply. If the die temperature rises above 150C, the device will go into thermal shutdown. For the TO-3 package (K, KC), the junction-to-ambient thermal resistance (JA) is 39C/W. When using a heatsink, JA is the sum of the 4C/W junction-to-case thermal resistance (JC) of the TO-3 package and the case-to-ambient thermal resistance of the heatsink. For the TO-220 package (T), JA is 54C/W and JC is 4C/W. If SOT-223 is used, the junction-to-ambient thermal resistance is 174C/W and can be reduced by a heatsink (see Applications Hints on heatsinking). If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package: Using 0.5 square inches of copper area, JA is 50C/W; with 1 square inch of copper area, JAis 37C/W; and with 1.6 or more inches of copper area, JA is 32C/W. Note 3: ESD rating is based on the human body model, 100 pF discharged through 1.5 k. Note 4: All characteristics are measured with a 0.22 F capacitor from input to ground and a 0.1 F capacitor from output to ground. All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (tw 10 ms, duty cycle 5%). Output voltage changes due to changes in internal temperature must be taken into account separately. Note 5: A military RETS specification is available on request. At the time of printing, the military RETS specifications for the LM140AK-5.0/883, LM140AK-12/883, and LM140AK-15/883 complied with the min and max limits for the respective versions of the LM140A. At the time of printing, the military RETS specifications for the LM140K-5.0/883, LM140K-12/883, and LM140K-15/883 complied with the min and max limits for the respective versions of the LM140. The LM140H/883, LM140K/883, and LM140AK/883 may also be procured as a Standard Military Drawing. www.national.com 4 0C TJ +150C, VI = 14V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F, unless otherwise specified Symbol Parameter Conditions (Note 6) VO Output Voltage TJ = 25C VO Line Regulation TJ = 25C VO Load Regulation TJ = 25C LM7808C Units Min Typ Max 7.7 8.0 8.3 V 10.5V VI 25V 6.0 160 mV 11.0V VI 17V 2.0 80 5.0 mA IO 1.5A 12 160 250 mA IO 750 mA 4.0 80 8.4 V 4.3 8.0 mA mA VO Output Voltage 11.5V VI 23V, 5.0 mA IO 1.0A, P 15W IQ Quiescent Current TJ = 25C IQ Quiescent With Line 11.5V VI 25V 1.0 Current Change With Load 5.0 mA IO 1.0A 0.5 7.6 mV VN Noise TA = 25C, 10 Hz f 100 kHz VI/VO Ripple Rejection f = 120 Hz, IO = 350 mA, TJ = 25C VDO Dropout Voltage IO = 1.0A, TJ = 25C 2.0 V RO Output Resistance f = 1.0 kHz 16 m IOS Output Short Circuit Current TJ = 25C, VI = 35V 0.45 A 56 52 V 72 dB IPK Peak Output Current TJ = 25C 2.2 A VO/T Average Temperature IO = 5.0 mA 0.8 mV/C Coefficient of Output Voltage Note 6: All characteristics are measured with a 0.22 F capacitor from input to ground and a 0.1 F capacitor from output to ground. All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (tw 10 ms, duty cycle 5%). Output voltage changes due to changes in internal temperature must be taken into account separately. Typical Performance Characteristics Maximum Average Power Dissipation Maximum Average Power Dissipation DS007781-22 Maximum Power Dissipation (TO-263) (See Note 2) DS007781-23 DS007781-24 5 www.national.com LM340/LM78MXX LM7808C Electrical Characteristics LM340/LM78MXX Typical Performance Characteristics Output Voltage (Normalized to 1V at Tj = 25C) (Continued) Ripple Rejection Ripple Rejection DS007781-26 DS007781-27 DS007781-25 Note: Shaded area refers to LM340A/LM340, LM7805C, LM7812C and LM7815C. Output Impedance Dropout Characteristics Quiescent Current DS007781-29 DS007781-28 DS007781-30 Note: Shaded area refers to LM340A/LM340, LM7805C, LM7812C and LM7815C. Peak Output Current Quiescent Current Dropout Voltage DS007781-31 DS007781-32 Note: Shaded area refers to LM340A/LM340, LM7805C, LM7812C and LM7815C. www.national.com 6 DS007781-33 (Continued) Line Regulation 140AK-5.0, IOUT = 1A, TA = 25C Line Regulation 140AK-5.0, VIN = 10V, TA = 25C DS007781-5 LM340/LM78MXX Typical Performance Characteristics DS007781-6 Equivalent Schematic DS007781-7 short will cause the input to rapidly approach ground potential, while the output remains near the initial VOUTbecause of the stored charge in the large output capacitor. The capacitor will then discharge through a large internal input to output diode and parasitic transistors. If the energy released by the capacitor is large enough, this diode, low current metal and the regulator will be destroyed. The fast diode in Figure 1 will shunt most of the capacitors discharge current around the regulator. Generally no protection diode is required for values of output capacitance 10 F. Raising the Output Voltage above the Input Voltage: Since the output of the device does not sink current, forcing Application Hints The LM340/LM78XX series is designed with thermal protection, output short-circuit protection and output transistor safe area protection. However, as with any IC regulator, it becomes necessary to take precautions to assure that the regulator is not inadvertently damaged. The following describes possible misapplications and methods to prevent damage to the regulator. Shorting the Regulator Input: When using large capacitors at the output of these regulators, a protection diode connected input to output (Figure 1) may be required if the input is shorted to ground. Without the protection diode, an input 7 www.national.com LM340/LM78MXX Application Hints When a value for (H-A) is found using the equation shown, a heatsink must be selected that has a value that is less than or equal to this number. (Continued) the output high can cause damage to internal low current paths in a manner similar to that just described in the "Shorting the Regulator Input" section. (H-A) is specified numerically by the heatsink manufacturer in this catalog, or shown in a curve that plots temperature rise vs power dissipation for the heatsink. Regulator Floating Ground (Figure 2): When the ground pin alone becomes disconnected, the output approaches the unregulated input, causing possible damage to other circuits connected to VOUT. If ground is reconnected with power "ON", damage may also occur to the regulator. This fault is most likely to occur when plugging in regulators or modules with on card regulators into powered up sockets. Power should be turned off first, thermal limit ceases operating, or ground should be connected first if power must be left on. Transient Voltages: If transients exceed the maximum rated input voltage of the device, or reach more than 0.8V below ground and have sufficient energy, they will damage the regulator. The solution is to use a large input capacitor, a series input breakdown diode, a choke, a transient suppressor or a combination of these. HEATSINKING TO-263 AND SOT-223 PACKAGE PARTS Both the TO-263 ("S") and SOT-223 ("MP") packages use a copper plane on the PCB and the PCB itself as a heatsink. To optimize the heat sinking ability of the plane and PCB, solder the tab of the plane. shows for the TO-263 the measured values of (J-A) for different copper area sizes using a typical PCB with 1 ounce copper and no solder mask over the copper area used for heatsinking. DS007781-39 FIGURE 4. (J-A) vs Copper (1 ounce) Area for the TO-263 Package DS007781-8 FIGURE 1. Input Short As shown in the figure, increasing the copper area beyond 1 square inch produces very little improvement. It should also be observed that the minimum value of (J-A) for the TO-263 package mounted to a PCB is 32C/W. As a design aid, Figure 5 shows the maximum allowable power dissipation compared to ambient temperature for the TO-263 device (assuming (J-A) is 35C/W and the maximum junction temperature is 125C). DS007781-9 FIGURE 2. Regulator Floating Ground DS007781-40 FIGURE 5. Maximum Power Dissipation vs TAMB for the TO-263 Package DS007781-10 FIGURE 3. Transients www.national.com 8 LM340/LM78MXX Application Hints (Continued) Figures 6, 7 show the information for the SOT-223 package. Figure 6 assumes a (J-A) of 74C/W for 1 ounce copper and 51C/W for 2 ounce copper and a maximum junction temperature of 125C. DS007781-42 FIGURE 7. Maximum Power Dissipation vs TAMB for the SOT-223 Package DS007781-41 FIGURE 6. (J-A) vs Copper (2 ounce) Area for the SOT-223 Package Please see AN-1028 for power enhancement techniques to be used with the SOT-223 package. Typical Applications Fixed Output Regulator High Input Voltage Circuits DS007781-14 DS007781-13 Note: Bypass capacitors are recommended for optimum stability and transient response, and should be located as close as possible to the regulator. DS007781-15 9 www.national.com LM340/LM78MXX Typical Applications (Continued) High Current Voltage Regulator DS007781-16 High Output Current, Short Circuit Protected DS007781-17 Positive and Negative Regulator DS007781-18 www.national.com 10 LM340/LM78MXX Connection Diagrams and Ordering Information TO-3 Metal Can Package (K) TO-220 Power Package (T) DS007781-11 DS007781-12 Bottom View Steel Package Order Numbers: LM140K-5.0 LM140K-12 LM140K-15 LM340K-12 LM340K-15 LM340K-5.0 See Package Number K02A LM140K-5.0/883 LM140K-12/883 LM140K-15/883 See Package Number K02C Top View Plastic Package Order Numbers: LM340AT-5.0 LM340T-5.0 LM340T-12 LM340T-15 LM7805CT LM7812CT LM7815CT LM7808CT See Package Number T03B TO-39 Metal Can Package (H) DS007781-19 Top View Metal Can Order Numbers: LM140H-5.0/883 LM140H-6.0/883 LM140H-8.0/883 LM140H-12/883 LM140H-15/883 LM140H-24/883 See Package Number H03A TO-263 Surface-Mount Package (S) DS007781-21 Side View Surface-Mount Package Order Numbers: LM340S-5.0 LM340S-12 See Package Number TS3B DS007781-20 Top View 3-Lead SOT-223 (Front View) Order Number LM340MP-5.0 Package Marked NO0A See Package Number MA04A DS007781-43 The specifications for the LM140H/883 devices are not contained in this datasheet. If specifications for these devices are required, contact the National Semiconductor Sales Office/Distributors. 11 www.national.com LM340/LM78MXX Physical Dimensions inches (millimeters) unless otherwise noted TO-3 Metal Can Package (K) Order Number LM140K-5.0, LM340K-5.0, LM140K-12, LM340K-12, LM140K-15, LM340K-15, LM7806CK, LM7808CK, LM7818CK or LM7824CK NS Package Number K02A TO-3 Metal Can Package (K) Mil-Aero Products Order Number LM140K-5.0/883, LM140K-12/883, or LM140K-15/883 NS Package Number K02C www.national.com 12 LM340/LM78MXX Physical Dimensions inches (millimeters) unless otherwise noted (Continued) TO-263 Surface-Mount Package (S) Order Number LM340S-5.0 or LM340S-12 NS Package Number TS3B 13 www.national.com LM340/LM78MXX Physical Dimensions inches (millimeters) unless otherwise noted (Continued) TO-220 Power Package (T) Order Number LM340AT/LM340T-5.0, LM340AT/LM340T-12, LM340AT/LM340T-15, LM7805CT, LM7812CT, LM7815CT, LM7806CT, LM7808CT, LM7818CT or LM7824CT NS Package Number T03B www.national.com 14 LM340/LM78MXX Series 3-Terminal Positive Regulators Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead SOT-223 Package Order Part Number LM340MP-5.0 NS Package Number MA04A 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 AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Francais Tel: +33 (0) 1 41 91 8790 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: ap.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. 1 of 6 National Semiconductor Company Design Purchasing Quality Company Jobs Products > Analog - Regulators > Linear Regulators - Standard/NPN > Positive Voltage - Fixed > LM340 Product Folder LM340 Series 3-Terminal Positive Regulators Generic P/N 340 Contents Parametric Table Multiple Output Capability No l l l l l General Description Features Datasheet Package Availability, Models, Samples & Pricing Application Notes On/Off Pin No Input Voltage, min (Volt) 7.50,14.60 Input Voltage, max (Volt) 35 Output Current, max 1 Amp Output Voltage (Volt) 5,12 General Description The LM140/LM340A/LM340/LM7800C monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.0A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents. Considerable effort was expended to make the entire series of regulators easy to use and 2 of 6 minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply. The 5V, 12V, and 15V regulator options are available in the steel TO-3 power package. The LM340A/LM340/LM7800C series is available in the TO-220 plastic power package, and the LM340-5.0 is available in the SOT-223 package, as well as the LM340-5.0 and LM340-12 in the surface-mount TO-263 package. Features l l l Complete specifications at 1A load Output voltage tolerances of 2% at Tj = 25C and 4% over the temperature range (LM340A) Line regulation of 0.01% of VOUT/V of [Delta]VIN at 1A load (LM340A) l Load regulation of 0.3% of VOUT/A (LM340A) l Internal thermal overload protection Internal short-circuit current limit Output transistor safe area protection P+ Product Enhancement tested l l l Device LM140 OutputVoltages 5, 12, 15 Packages TO-3 (K) LM340A/LM340 5, 12, 15 TO-3 (K), TO-220 (T), SOT-223 (MP), TO-263 (S) (5V and 12V only) LM7800C TO-220 (T) Datasheet 5, 8, 12, 15 3 of 6 Title Size (in Kbytes) Date View Online Download Receive via Email LM340/LM78MXX Series 3-Terminal Positive Regulators 514 Kbytes 16-Mar-00 View Online Download Receive via Email Please use Adobe Acrobat to view PDF file(s). If you have trouble printing, see Printing Problems. Package Availability, Models, Samples & Pricing Samples Budgetary Pricing Std & Package Status Pack Electronic Marking Type # pins SPICE IBIS Quantity $US each Size Orders reel Samples 2T SOT-223 4 Full production N/A N/A 1K+ $0.3300 of N00A 1000 reel . 2T SOT-223 4 Full production N/A N/A 1K+ $0.3300 of N00A 2000 tube [logo]UZ2T . TO-220 3 Full production N/A N/A 1K+ $0.8000 of LM340AT 45 5.0 P+ tube [logo]UZ2T . TO-220 3 Full production N/A N/A 2500+ $0.2960 of LM340T12 45 7812 P+ tube [logo]UZ2T . TO-220 3 Full production N/A N/A 2500+ $0.2960 of LM340T15 45 7815 P+ tube [logo]UZ2T . TO-220 3 Full production N/A N/A 2500+ $0.2960 of LM340T5 45 7805 P+ Package Part Number LM340MP-5.0 LM340MPX-5.0 LM340AT-5.0 LM340T-12 LM340T-15 LM340T-5.0 Models Order Parts Order Parts Order Parts Order Parts Order Parts Order Parts 4 of 6 Samples LM340S-12 TO 263 3 Full production N/A N/A LM340S-5.0 TO 263 3 Full production N/A N/A LM340SX-12 TO 263 3 Full production N/A N/A LM340SX-5.0 TO 263 3 Full production N/A N/A LM340K-12 TO-3 2 Full production N/A N/A LM340K-15 TO-3 2 Full production N/A N/A LM340K-5.0 TO-3 2 Full production N/A N/A Full production Full production Full production Full production Full production Full production Full production N/A N/A N/A N/A N/A N/A N/A Order Parts 1K+ $0.5700 1K+ $0.5700 1K+ $0.6000 1K+ $0.6000 1K+ $2.1800 1K+ $2.1800 1K+ $2.1800 Samples Order Parts . Order Parts . Order Parts . Order Parts . Order Parts . LM340-5.0 MDA LM340-12 MWC LM340G-12 MWC LM340G-15 MWC LM340G-5 MWC LM340T-5.0 MWC LM340-5.0 MWA die wafer wafer wafer wafer wafer wafer Application Notes N/A N/A N/A N/A N/A N/A N/A Order Parts . . . . . . . tube of 45 tube of 45 reel of 500 reel of 500 tray of 50 tray of 50 tray of 50 N/A N/A N/A N/A N/A N/A N/A [logo]UZ2T LM340S -12 P+ [logo]UZ2T LM340S -5.0 P+ [logo]UZ2T LM340S -12 P+ [logo]UZ2T LM340S -5.0 P+ [logo]Z2T LM340K 12 7812P+ [logo]Z2T LM340K 15 7815P+ [logo]Z2T LM340K -5.0 7805P+ - 5 of 6 Title AN-103: LM340 Series Three Terminal Positive Regulators AN-127: LM 143 Monolithic High Voltage Operational Amplifier Applications AB-12: Wide Adjustable Range PNP Voltage Regulator Wide Adjustable Range PNP Voltage Regulator (JAPANESE) AN-182: Inproving Power Supply Reliability with IC Power Regulators AN-202: A Digital Multimeter Using the ADD3501 AN-222: Application Note 222 Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise AN-298: Isolation Techniques for Signal Conditioning AN-76: Applying Modern Clock Drivers to MOS Memories Size (in Kbytes) 234 Kbytes 248 Kbytes 58 Kbytes [Information as of 29-Aug-2000] View Online Download Receive via Email 4-NovView Online Download 95 4-NovView Online Download 95 4-NovView Online Download 95 Receive via Email Receive via Email Receive via Email 4-Nov95 4-Nov95 24Feb-99 4-Nov95 4-Nov95 24May00 Receive via Email Receive via Email Receive via Email Receive via Email Receive via Email 31 Kbytes 76 Kbytes 124 Kbytes 399 Kbytes 197 Kbytes 213 Kbytes AN-1148: Application Note 1148 Linear Regulators: Theory Of Operation 143 Kbytes and Compensation Please use Adobe Acrobat to view PDF file(s). 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Feedback 1 of 6 National Semiconductor Company Design Purchasing Quality Company Jobs Products > Analog - Regulators > Linear Regulators - Standard/NPN > Positive Voltage - Fixed > LM340 Product Folder LM340 Series 3-Terminal Positive Regulators Generic P/N 340 Contents Parametric Table Multiple Output Capability No l l l l l General Description Features Datasheet Package Availability, Models, Samples & Pricing Application Notes On/Off Pin No Input Voltage, min (Volt) 7.50,14.60 Input Voltage, max (Volt) 35 Output Current, max 1 Amp Output Voltage (Volt) 5,12 General Description The LM140/LM340A/LM340/LM7800C monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.0A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents. Considerable effort was expended to make the entire series of regulators easy to use and 2 of 6 minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply. The 5V, 12V, and 15V regulator options are available in the steel TO-3 power package. The LM340A/LM340/LM7800C series is available in the TO-220 plastic power package, and the LM340-5.0 is available in the SOT-223 package, as well as the LM340-5.0 and LM340-12 in the surface-mount TO-263 package. Features l l l Complete specifications at 1A load Output voltage tolerances of 2% at Tj = 25C and 4% over the temperature range (LM340A) Line regulation of 0.01% of VOUT/V of [Delta]VIN at 1A load (LM340A) l Load regulation of 0.3% of VOUT/A (LM340A) l Internal thermal overload protection Internal short-circuit current limit Output transistor safe area protection P+ Product Enhancement tested l l l Device LM140 OutputVoltages 5, 12, 15 Packages TO-3 (K) LM340A/LM340 5, 12, 15 TO-3 (K), TO-220 (T), SOT-223 (MP), TO-263 (S) (5V and 12V only) LM7800C TO-220 (T) Datasheet 5, 8, 12, 15 3 of 6 Title Size (in Kbytes) Date View Online Download Receive via Email LM340/LM78MXX Series 3-Terminal Positive Regulators 514 Kbytes 16-Mar-00 View Online Download Receive via Email Please use Adobe Acrobat to view PDF file(s). If you have trouble printing, see Printing Problems. Package Availability, Models, Samples & Pricing Samples Budgetary Pricing Std & Package Status Pack Electronic Marking Type # pins SPICE IBIS Quantity $US each Size Orders reel Samples 2T SOT-223 4 Full production N/A N/A 1K+ $0.3300 of N00A 1000 reel . 2T SOT-223 4 Full production N/A N/A 1K+ $0.3300 of N00A 2000 tube [logo]UZ2T . TO-220 3 Full production N/A N/A 1K+ $0.8000 of LM340AT 45 5.0 P+ tube [logo]UZ2T . TO-220 3 Full production N/A N/A 2500+ $0.2960 of LM340T12 45 7812 P+ tube [logo]UZ2T . TO-220 3 Full production N/A N/A 2500+ $0.2960 of LM340T15 45 7815 P+ tube [logo]UZ2T . TO-220 3 Full production N/A N/A 2500+ $0.2960 of LM340T5 45 7805 P+ Package Part Number LM340MP-5.0 LM340MPX-5.0 LM340AT-5.0 LM340T-12 LM340T-15 LM340T-5.0 Models Order Parts Order Parts Order Parts Order Parts Order Parts Order Parts 4 of 6 Samples LM340S-12 TO 263 3 Full production N/A N/A LM340S-5.0 TO 263 3 Full production N/A N/A LM340SX-12 TO 263 3 Full production N/A N/A LM340SX-5.0 TO 263 3 Full production N/A N/A LM340K-12 TO-3 2 Full production N/A N/A LM340K-15 TO-3 2 Full production N/A N/A LM340K-5.0 TO-3 2 Full production N/A N/A Full production Full production Full production Full production Full production Full production Full production N/A N/A N/A N/A N/A N/A N/A Order Parts 1K+ $0.5700 1K+ $0.5700 1K+ $0.6000 1K+ $0.6000 1K+ $2.1800 1K+ $2.1800 1K+ $2.1800 Samples Order Parts . Order Parts . Order Parts . Order Parts . Order Parts . LM340-5.0 MDA LM340-12 MWC LM340G-12 MWC LM340G-15 MWC LM340G-5 MWC LM340T-5.0 MWC LM340-5.0 MWA die wafer wafer wafer wafer wafer wafer Application Notes N/A N/A N/A N/A N/A N/A N/A Order Parts . . . . . . . tube of 45 tube of 45 reel of 500 reel of 500 tray of 50 tray of 50 tray of 50 N/A N/A N/A N/A N/A N/A N/A [logo]UZ2T LM340S -12 P+ [logo]UZ2T LM340S -5.0 P+ [logo]UZ2T LM340S -12 P+ [logo]UZ2T LM340S -5.0 P+ [logo]Z2T LM340K 12 7812P+ [logo]Z2T LM340K 15 7815P+ [logo]Z2T LM340K -5.0 7805P+ - 5 of 6 Title AN-103: LM340 Series Three Terminal Positive Regulators AN-127: LM 143 Monolithic High Voltage Operational Amplifier Applications AB-12: Wide Adjustable Range PNP Voltage Regulator Wide Adjustable Range PNP Voltage Regulator (JAPANESE) AN-182: Inproving Power Supply Reliability with IC Power Regulators AN-202: A Digital Multimeter Using the ADD3501 AN-222: Application Note 222 Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise AN-298: Isolation Techniques for Signal Conditioning AN-76: Applying Modern Clock Drivers to MOS Memories Size (in Kbytes) 234 Kbytes 248 Kbytes 58 Kbytes [Information as of 29-Aug-2000] View Online Download Receive via Email 4-NovView Online Download 95 4-NovView Online Download 95 4-NovView Online Download 95 Receive via Email Receive via Email Receive via Email 4-Nov95 4-Nov95 24Feb-99 4-Nov95 4-Nov95 24May00 Receive via Email Receive via Email Receive via Email Receive via Email Receive via Email 31 Kbytes 76 Kbytes 124 Kbytes 399 Kbytes 197 Kbytes 213 Kbytes AN-1148: Application Note 1148 Linear Regulators: Theory Of Operation 143 Kbytes and Compensation Please use Adobe Acrobat to view PDF file(s). If you have trouble printing, see Printing Problems. Date View Online Download View Online Download View Online Download View Online Download View Online Download View Online Download Receive via Email 6 of 6 Quick Search Parametric Search System Diagrams Product Tree Home About Languages . About the Site . About "Cookies" National is QS 9000 Certified . Privacy/Security Copyright (c) National Semiconductor Corporation Preferences . Feedback