西安交通大学：《工程训练之—工业系统的测量》（英文版）LM78XX Series voltage Regulators

National semiconductor LM78XX Series voltage Regulators F∞×0 General Description de range of applica is local on card bypassing is needed only if the regulator is located far from 9 gulation, eliminating the distribution problems associated the filter capacitor of the power supply rith single point regulation. The voltages available allow For output voltage other than 5V, 12V and 15v the LM117 with extermal components to obtain these Features The LM78XX series is available in an aluminum To-3 pack. Intemal the nt in excess of 1A heat No external components i nking is provided. Current limiting is included to limit a Internal short circuit curren he output transistor is provided to limit intemal power dissi. a Available in the aluminum ation. If internal power dissipation becomes too high for e heat sinking provided, the thermal shutdown circuit Voltage Range ries of regulators easy to use and minimize the number LM7812C Considerable effort was expanded to make the LM78Xx se- LM7815G Schematic and Connection Diagrams Metal Can Package OUTPUT TL/H7746-2 Order Num M7805 See Ns Packa TLH7746-2 umber LM7805CT CT or LM7815CT ckage Number To3B TLH/746=1

TL/H/7746 LM78XX Series Voltage Regulators February 1995 LM78XX Series Voltage Regulators General Description The LM78XX series of three terminal regulators is available with several fixed output voltages making them useful in a wide range of applications. One of these is local on card regulation, eliminating the distribution problems associated with single point regulation. The voltages available allow these regulators to be used in logic systems, instrumenta￾tion, HiFi, and other solid state electronic equipment. Al￾though designed primarily as fixed voltage regulators these devices can be used with external components to obtain adjustable voltages and currents. The LM78XX series is available in an aluminum TO-3 pack￾age which will allow over 1.0A load current if adequate heat sinking is provided. 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 dissi￾pation. If internal power dissipation becomes too high for the heat sinking provided, the thermal shutdown circuit takes over preventing the IC from overheating. Considerable effort was expanded to make the LM78XX se￾ries of regulators easy to use and mininize 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. For output voltage other than 5V, 12V and 15V the LM117 series provides an output voltage range from 1.2V to 57V. Features Y Output current in excess of 1A Y Internal thermal overload protection Y No external components required Y Output transistor safe area protection Y Internal short circuit current limit Y Available in the aluminum TO-3 package Voltage Range LM7805C 5V LM7812C 12V LM7815C 15V Schematic and Connection Diagrams TL/H/7746 –1 Metal Can Package TO-3 (K) Aluminum TL/H/7746 –2 Bottom View Order Number LM7805CK, LM7812CK or LM7815CK See NS Package Number KC02A Plastic Package TO-220 (T) TL/H/7746 –3 Top View Order Number LM7805CT, LM7812CT or LM7815CT See NS Package Number T03B C1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A

Absolute Maximum Ratings Office/Distributors for availability and specif (T Package Input Voltage (o= 5v, 12V and 15v) Storage Temperature Range 65°cto+ Intemal Power Dissipation(Note 1) Intemally Limited Lead Operating Temperature Range (TA) o°cto+70° To-3p,Perature(Soldering. TO-220 Package T Electrical Characteristics LM78XXC (Note 2)o'C s Tj s 125"C unless otherwise noted. Output Voltage ut Voltage(unless otherwise noted) 10v Units arameter Typ ≤15W,5mA≤bo≤1A 52511 1261425 575V VMIN S VIN SVMAX 5≤N≤20)(145sWN≤27(175≤W≤30)v △vo| Line Regulation lo=500 mA T]=25C 4150mv △vN 7≤WN≤25)14.5≤wN≤30)(17.5sWN≤30)V octS+125"C 150|mv swN≤20)(15swN≤27(18.5≤WN≤30)V o≤1AT=25°c △V|N 75≤vN (146≤ⅥN≤27(177sw≤30)V o℃c≤订≤+125c 25 ≤WN≤12)(16≤wNs22(20svN≤26)V △vo| Load Regulation=25c|5mAso≤15A 250 mA s lo≤750mA mA≤lo≤1Aoc≤≤ 150mv 0"c≤T≤+125 Quiescent Current 5 mA 75≤v lo s 500 mA, oC s Ts +125.C 1.0 1.0 N≤VMAx (7≤N≤25)(14.5≤WN≤30)(175≤wN≤30) b≤1An=25c06280 5470 dB =120H1o≤500 0℃c≤T≤+125c N≤MAX 8≤WN≤18)(15≤WN≤25)(185sVN≤28.5)V Ro Dropout Voltage Ti=25"C, lOUT=lA 2.0 Output Resistance f=1kHz 1.2 Peak Output Current Ti=25"C 4 24 verage TC of VouT o"C≤T≤+125cb=5mA mv/°C VIN Input Voltage equired to Maintain T=25 C, lo s 1A 75 14.6 177 and 35.C/w case to ambient. Thermal resistance of the to-220 voltage and ripple rejection ratio are measured using pulse techniques (t s 10 ms, duty cyde s 5%). Output voltage changes due to changes in internal temperature must be taken into account separately 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Input Voltage (VO e 5V, 12V and 15V) 35V Internal Power Dissipation (Note 1) Internally Limited Operating Temperature Range (TA) 0§C to a70§C Maximum Junction Temperature (K Package) 150§C (T Package) 150§C Storage Temperature Range b65§C to a150§C Lead Temperature (Soldering, 10 sec.) TO-3 Package K 300§C TO-220 Package T 230§C Electrical Characteristics LM78XXC (Note 2) 0§C s Tj s 125§C unless otherwise noted. Output Voltage 5V 12V 15V Input Voltage (unless otherwise noted) 10V 19V 23V Units Symbol Parameter Conditions Min Typ Max Min Typ Max Min Typ Max VO Output Voltage Tj e 25§C, 5 mA s IO s 1A 4.8 5 5.2 11.5 12 12.5 14.4 15 15.6 V PD s 15W, 5 mA s IO s 1A 4.75 5.25 11.4 12.6 14.25 15.75 V VMIN s VIN s VMAX (7.5 s VIN s 20) (14.5 s VIN s 27) (17.5 s VIN s 30) V DVO Line Regulation IO e 500 mA Tj e 25§C 3 50 4 120 4 150 mV DVIN (7 s VIN s 25) 14.5 s VIN s 30) (17.5 s VIN s 30) V 0§C s Tj s a125§C 50 120 150 mV DVIN (8 s VIN s 20) (15 s VIN s 27) (18.5 s VIN s 30) V IO s 1A Tj e 25§C 50 120 150 mV DVIN (7.5 s VIN s 20) (14.6 s VIN s 27) (17.7 s VIN s 30) V 0§C s Tj s a125§C 25 60 75 mV DVIN (8 s VIN s 12) (16 s VIN s 22) (20 s VIN s 26) V DVO Load Regulation Tj e 25§C 5 mA s IO s 1.5A 10 50 12 120 12 150 mV 250 mA s IO s 750 mA 25 60 75 mV 5 mA s IO s 1A, 0§C s Tj s a125§C 50 120 150 mV IQ Quiescent Current IO s 1A Tj e 25§C 8 8 8 mA 0§C s Tj s a125§C 8.5 8.5 8.5 mA DIQ Quiescent Current 5 mA s IO s 1A 0.5 0.5 0.5 mA Change Tj e 25§C, IO s 1A 1.0 1.0 1.0 mA VMIN s VIN s VMAX (7.5 s VIN s 20) (14.8 s VINs 27) (17.9 s VIN s 30) V IO s 500 mA, 0§C s Tj s a125§C 1.0 1.0 1.0 mA VMIN s VIN s VMAX (7 s VIN s 25) (14.5 s VINs 30) (17.5 s VIN s 30) V VN Output Noise Voltage TA e25§C, 10 Hz s f s 100 kHz 40 75 90 mV DVIN DVOUT Ripple Rejection IO s 1A, Tj e 25§C or 62 80 55 72 54 70 dB f e 120 Hz IO s 500 mA 62 55 54 dB Ð 0§C s Tj s a125§C VMIN s VIN s VMAX (8 s VIN s 18) (15 s VIN s 25) (18.5 s VIN s 28.5) V RO Dropout Voltage Tj e 25§C, IOUT e 1A 2.0 2.0 2.0 V Output Resistance f e 1 kHz 8 18 19 mX Short-Circuit Current Tj e 25§C 2.1 1.5 1.2 A Peak Output Current Tj e 25§C 2.4 2.4 2.4 A Average TC of VOUT 0§C s Tj s a125§C, IO e 5 mA 0.6 1.5 1.8 mV/§C VIN Input Voltage Required to Maintain Tj e 25§C, IO s 1A 7.5 14.6 17.7 V Line Regulation Note 1: Thermal resistance of the TO-3 package (K, KC) is typically 4§C/W junction to case and 35§C/W case to ambient. Thermal resistance of the TO-220 package (T) is typically 4§C/W junction to case and 50§C/W case to ambient. Note 2: All characteristics are measured with capacitor across the input of 0.22 mF, and a capacitor across the output of 0.1mF. All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (tw s 10 ms, duty cycle s 5%). Output voltage changes due to changes in internal temperature must be taken into account separately. 2

Typical Performance Characteristics Maximum Average Power Peak Output Current TO3 万-50-250255}5I00125 NT TEMPERATURE AMBIENT TEMPERATURE( C) \PUT TO OUTPUT DIFFE RENTIAL 'V) Output to lvat T=25°c) Ripple Rejection Ripple Rejection 思当三 Output Impedance copout Voltage Dropout Characteristics OUT.0A Quiescent Current VOuT.5 三出 -50-202550751012515 JUNCTION TEMPERATURE tc) INPUT VOLTAGE

Typical Performance Characteristics Dissipation Maximum Average Power Dissipation Maximum Average Power Peak Output Current to 1V at Tj e 25§C) Output Voltage (Normalized Ripple Rejection Ripple Rejection Output Impedance Dropout Voltage Dropout Characteristics Quiescent Current Quiescent Current TL/H/7746 –4 3

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Physical Dimensions inches(millimeters) 212 0.025 11.30-13 0.038-0.043 0.420-0.44 DIA TYP 0.165-0.179 (24.64-2667 Aluminum Metal Can Package(Kc) Order Number LM7805CK, LM7812CK or LM7815CK NS Package Number KCO2A

Physical Dimensions inches (millimeters) Aluminum Metal Can Package (KC) Order Number LM7805CK, LM7812CK or LM7815CK NS Package Number KC02A 5

0o5oro品=o>0oo0××o2 g Physical Dimensions inches (millimeters)(Continued) 7,400415 0.048=0.05 N110 n1-(1321-1 00-50 c5:10214(26 SEATING我具NE Order Number LM7805CT, LM7812CT or LM7815CT NS Package Number To3B ATIONAL'S PRODUCTS AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPC VICES OR SYSTEMS THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATION SEMICONDUCTOR CORPORATION. As used herein Life support devices or systems are devices or 2. A critical component is any co systems which, (a) are intended for surgical implant e reasonably expected to cause support device or system, or to vith instructions for use provided in the labeling, can effectiveness. to result in a significant inju F5350 Natonal does not assume any sporeiN for use of any cicu try dcbad, no drmu patent lenses a mpod and National resorts tho at any io witout nonce o chango said cory and spoo cations

LM78XX Series Voltage Regulators Physical Dimensions inches (millimeters) (Continued) TO-220 Package (T) Order Number LM7805CT, LM7812CT or LM7815CT 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. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd. 1111 West Bardin Road Fax: ( a49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309 Arlington, TX 76017 Email: cnjwge @tevm2.nsc.com Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408 Tel: 1(800) 272-9959 Deutsch Tel: ( a49) 0-180-530 85 85 Tsimshatsui, Kowloon Fax: 1(800) 737-7018 English Tel: ( a49) 0-180-532 78 32 Hong Kong Fran 3ais Tel: ( a49) 0-180-532 93 58 Tel: (852) 2737-1600 Italiano Tel: ( a49) 0-180-534 16 80 Fax: (852) 2736-9960 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