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L78S05CT中文资料

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L78S00SERIESJanuary 19932A POSITIVE VOLTAGE REGULATORS.OUTPUT CURRENT TO 2A.OUTPUT VOLTAGES OF 5;7.5;9;10;12;15;18;24V.THERMAL OVERLOAD PROTECTION .SHORT CIRCUIT PROTECTION.OUTPUT TRANSISTOR SOA PROTECTIONDESCRIPTIONThe L78S00series of three-terminal positive regu-lators is available in TO-220and TO-3packages and with several fixed output voltages,making it useful in a wide range of applications.These regu-lators can provide local on-card regulation,eliminat-ing the distribution problems associated with single point regulation.Each type employs internal current limiting,thermal shut-down and safe area protec-tion,making it essentially indestructible.If adequate heat sinking is provided,they can deliver over 2A output current.Although designed primarily as fixed voltage regulators,these devices can be used with external components to obtain adjustable voltages and currents.TO-220BLOCK DIAGRAMTO-31/21ABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV i DC Input Voltage(for V o=5to18V)(for V o=24V)3540VVI o Output Current Internally limitedP t o t Power Dissipation Internally limitedT s t g Storage Temperature–65to+150°CT o p Operating Junction Temperature(for L78S00)(for L78S00C)–55to+1500to+150°C°CTHERMAL DATATO-220TO-3R t h j-cas e R t h j-amb Thermal Resistance Junction-caseThermal Resistance Junction-ambientMaxMax350435°C/W°C/WCONNECTION DIAGRAMS AND ORDERING NUMBERS(top views)Type T O-220T O-3Output Voltage L78S05L78S05C L78S75 L78S75C L78S09 L78S09C L78S10 L78S10C L78S12 L78S12C L78S15 L78S15C L78S18 L78S18C L78S24 L78S24C L78S05CVL78S75CVL78S09CVL78S10CVL78S12CVL78S15CVL78S18CVL78S24CVL78S05TL78S05CTL78S75TL78S75CTL78S09TL78S09CTL78S10TL78S10CTL78S12TL78S12CTL78S15TL78S15CTL78S18TL78S18CTL78S24TL78S24CT5V5V7.5V7.5V9V9V10V10V12V12V15V15V18V18V24V24VL78S00SERIES 2/21L78S00SERIES APPLICATION CIRCUITSCHEMATIC DIAGRAM3/21L78S00SERIESTEST CIRCUITSFigure1:DC Parameters.Figure2:Load Regulation. Figure3:Ripple Rejection.4/21ELECTRICAL CHARACTERISTICS FOR L78S05(refer to the test circuits,T j=25o C,V i=10V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage 4.85 5.2V V o Output Voltage I o=1A V i=7V 4.755 5.25V∆V o Line Regulation V i=7to25VV i=8to25V 10050mVmV∆V o Load Regulation I o=20mA to2A100mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=7to25V 1.3mA ∆V o∆TOutput Voltage Drift I o=5mA T j=-55to150o C-1.1mV/o Ce N Output Noise Voltage B=10Hz to100KHz40µVSVR Supply Voltage Rejection f=120Hz60dB V i Operating Input Voltage I o≤1.5A8V R o Output Resistance f=1KHz17mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S75(refer to the test circuits,T j=25o C,V i=12.5V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage7.157.57.9V V o Output Voltage I o=1A V i=9.5V7.17.57.95V∆V o Line Regulation V i=9.5to25VV i=10.5to20V 12060mVmV∆V o Load Regulation I o=20mA to2A120mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA∆I d Quiescent Current Change I o=20mA V i=9.5to25V 1.3mA∆V o∆TOutput Voltage Drift I o=5mA T j=-55to150o C-0.8mV/o C e N Output Noise Voltage B=10Hz to100KHz52µV SVR Supply Voltage Rejection f=120Hz54dBV i Operating Input Voltage I o≤1.5A10.5VR o Output Resistance f=1KHz16mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AL78S00SERIES5/21ELECTRICAL CHARACTERISTICS FOR L78S09(refer to the test circuits,T j=25o C,V i=14V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage8.6599.35V V o Output Voltage I o=1A V i=11V8.699.4V∆V o Line Regulation V i=11to25VV i=11to20V 13065mVmV∆V o Load Regulation I o=20mA to2A130mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=11to25V 1.3mA ∆V o∆TOutput Voltage Drift I o=5mA T j=-55to150o C-1mV/o Ce N Output Noise Voltage B=10Hz to100KHz60µVSVR Supply Voltage Rejection f=120Hz53dB V i Operating Input Voltage I o≤1.5A12V R o Output Resistance f=1KHz17mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S10(refer to the test circuits,T j=25o C,V i=15V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage9.51010.5V V o Output Voltage I o=1A V i=12.5V9.41010.6V∆V o Line Regulation V i=12.5to30VV i=14to22V 200100mVmV∆V o Load Regulation I o=20mA to2A150mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=12.5to30V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=-55to150o C-1mV/o Ce N Output Noise Voltage B=10Hz to100KHz65µVSVR Supply Voltage Rejection f=120Hz53dB V i Operating Input Voltage I o≤1.5A13V R o Output Resistance f=1KHz17mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AL78S00SERIES6/21ELECTRICAL CHARACTERISTICS FOR L78S12(refer to the test circuits,T j=25o C,V i=19V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage11.51212.5V V o Output Voltage I o=1A V i=14.5V11.41212.6V∆V o Line Regulation V i=14.5to30VV i=16to22V 240120mVmV∆V o Load Regulation I o=20mA to2A160mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=14.5to30V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=-55to150o C-1mV/o Ce N Output Noise Voltage B=10Hz to100KHz75µVSVR Supply Voltage Rejection f=120Hz53dB V i Operating Input Voltage I o≤1.5A15V R o Output Resistance f=1KHz18mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S15(refer to the test circuits,T j=25o C,V i=23V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage14.41515.6V V o Output Voltage I o=1A V i=17.5V14.251515.75V∆V o Line Regulation V i=17.5to30VV i=20to26V 300150mVmV∆V o Load Regulation I o=20mA to2A180mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA∆I d Quiescent Current Change I o=20mA V i=17.5to30V1mA∆V o∆TOutput Voltage Drift I o=5mA T j=-55to150o C-1mV/o C e N Output Noise Voltage B=10Hz to100KHz90µV SVR Supply Voltage Rejection f=120Hz52dBV i Operating Input Voltage I o≤1.5A18VR o Output Resistance f=1KHz19mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AL78S00SERIES7/21ELECTRICAL CHARACTERISTICS FOR L78S18(refer to the test circuits,T j=25o C,V i=26V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage17.11818.9V V o Output Voltage I o=1A V i=20.5V171819V∆V o Line Regulation V i=20.5to30VV i=22to28V 360180mVmV∆V o Load Regulation I o=20mA to2A200mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=22to33V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=-55to150o C-1mV/o Ce N Output Noise Voltage B=10Hz to100KHz110µVSVR Supply Voltage Rejection f=120Hz49dB V i Operating Input Voltage I o≤1.5A21V R o Output Resistance f=1KHz22mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S24(refer to the test circuits,T j=25o C,V i=33V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage232425V V o Output Voltage I o=1A V i=27V22.82425.2V∆V o Line Regulation V i=27to38VV i=30to36V 480240mVmV∆V o Load Regulation I o=20mA to2A250mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=8to25V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=-55to150o C-1.5mV/o Ce N Output Noise Voltage B=10Hz to100KHz170µVSVR Supply Voltage Rejection f=120Hz48dB V i Operating Input Voltage I o≤1.5A27V R o Output Resistance f=1KHz23mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AL78S00SERIES8/21ELECTRICAL CHARACTERISTICS FOR L78S05C(refer to the test circuits,T j=25o C,V i=10V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage 4.85 5.2V V o Output Voltage I o=1A V i=7V 4.755 5.25V∆V o Line Regulation V i=7to25VV i=8to12V 10050mVmV∆V o Load Regulation I o=20mA to1.5AI o=2A80100mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=7to25V 1.3mA ∆V o∆TOutput Voltage Drift I o=5mA T j=0to70o C-1.1mV/o Ce N Output Noise Voltage B=10Hz to100KHz40µVSVR Supply Voltage Rejection f=120Hz54dB V i Operating Input Voltage I o≤1.5A8V R o Output Resistance f=1KHz17mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S75C(refer to the test circuits,T j=25o C,V i=12.5V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage7.157.57.9V V o Output Voltage I o=1A V i=9.5V7.17.57.95V∆V o Line Regulation V i=9.5to25VV i=10.5to20V 12060mVmV∆V o Load Regulation I o=20mA to1.5AI o=2A100140mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA∆I d Quiescent Current Change I o=20mA V i=9.5to25V 1.3mA∆V o∆TOutput Voltage Drift I o=5mA T j=0to70o C-0.8mV/o C e N Output Noise Voltage B=10Hz to100KHz52µV SVR Supply Voltage Rejection f=120Hz48dBV i Operating Input Voltage I o≤1.5A10.5VR o Output Resistance f=1KHz16mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AL78S00SERIES9/21ELECTRICAL CHARACTERISTICS FOR L78S09C(refer to the test circuits,T j=25o C,V i=14V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage8.6599.35V V o Output Voltage I o=1A V i=11V8.699.4V∆V o Line Regulation V i=11to25VV i=11to20V 13065mVmV∆V o Load Regulation I o=20mA to1.5AI o=2A100170mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=11to25V 1.3mA ∆V o∆TOutput Voltage Drift I o=5mA T j=0to70o C-1mV/o Ce N Output Noise Voltage B=10Hz to100KHz60µVSVR Supply Voltage Rejection f=120Hz47dB V i Operating Input Voltage I o≤1.5A12V R o Output Resistance f=1KHz17mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S10C(refer to the test circuits,T j=25o C,V i=15V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage9.51010.5V V o Output Voltage I o=1A V i=12.5V9.41010.6V∆V o Line Regulation V i=12.5to30VV i=14to22V 200100mVmV∆V o Load Regulation I o=20mA to1.5AI o=2A150240mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=12.5to30V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=0to70o C-1mV/o Ce N Output Noise Voltage B=10Hz to100KHz65µVSVR Supply Voltage Rejection f=120Hz47dB V i Operating Input Voltage I o≤1.5A13V R o Output Resistance f=1KHz17mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AL78S00SERIES10/21ELECTRICAL CHARACTERISTICS FOR L78S12C(refer to the test circuits,T j=25o C,V i=19V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage11.51212.5V V o Output Voltage I o=1A V i=14.5V11.41212.6V∆V o Line Regulation V i=14.5to30VV i=16to22V 240120mVmV∆V o Load Regulation I o=20mA to1.5AI o=2A150240mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=14.5to30V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=0to70o C-1mV/o Ce N Output Noise Voltage B=10Hz to100KHz75µVSVR Supply Voltage Rejection f=120Hz47dB V i Operating Input Voltage I o≤1.5A15V R o Output Resistance f=1KHz18mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S15C(refer to the test circuits,T j=25o C,V i=23V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage14.41515.6V V o Output Voltage I o=1A V i=17.5V14.251515.75V∆V o Line Regulation V i=17.5to30VV i=20to26V 300150mVmV∆V o Load Regulation I o=20mA to1.5AI o=2A150300mV I d Quiescent Current8mA ∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=17.5to30V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=0to70o C-1mV/o C e N Output Noise Voltage B=10Hz to100KHz90µV SVR Supply Voltage Rejection f=120Hz46dB V i Operating Input Voltage I o≤1.5A18V R o Output Resistance f=1KHz19mΩI sc Short Circuit Current V i=27V500mA I scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S18C(refer to the test circuits,T j=25o C,V i=26V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage17.11818.9V V o Output Voltage I o=1A V i=20.5V171819V∆V o Line Regulation V i=20.5to30VV i=22to28V 360180mVmV∆V o Load Regulation I o=20mA to1.5AI o=2A200360mVI d Quiescent Current8mA∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=20.5to30V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=0to70o C-1mV/o Ce N Output Noise Voltage B=10Hz to100KHz110µVSVR Supply Voltage Rejection f=120Hz43dB V i Operating Input Voltage I o≤1.5A21V R o Output Resistance f=1KHz22mΩI sc Short Circuit Current V i=27V500mAI scp Short Circuit Peack Current3AELECTRICAL CHARACTERISTICS FOR L78S24C(refer to the test circuits,T j=25o C,V i=33V,I o=500mA unless otherwise specified)Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage232425V V o Output Voltage I o=1A V i=27V22.82425.2V∆V o Line Regulation V i=27to38VV i=30to36V 480240mVmV∆V o Load Regulation I o=20mA to1.5AI o=2A300480mV I d Quiescent Current8mA ∆I d Quiescent Current Change I o=20mA to1A0.5mA ∆I d Quiescent Current Change I o=20mA V i=27to38V1mA ∆V o∆TOutput Voltage Drift I o=5mA T j=0to70o C-1.5mV/o C e N Output Noise Voltage B=10Hz to100KHz170µV SVR Supply Voltage Rejection f=120Hz42dB V i Operating Input Voltage I o≤1.5A27V R o Output Resistance f=1KHz28mΩI sc Short Circuit Current V i=27V500mA I scp Short Circuit Peack Current3AFigure6:Supply Voltage Rejection vs.Frequen-cy.Figure7:Output Voltage vs.Junction Tempera-ture.Figure4:Dropout Voltage vs.Junction Tempera-ture.Figure5:Peak Output Current vs.Input/Output Differential Voltage.Figure8:Output Impedance vs.Frequency.Figure9:Quiescent Current vs.Junction Tempe-rature.Figure12:Quiescent Current vs.Input Voltage.Figure13:Fixed Output Regulator.Figure14:Constant Current Regulator. Figure10:Load Transient Response.Figure11:Line Transient Response.Notes:1.To specify an output voltage,substitute voltage value for”XX”.2.Although no output capacitor is needed for sta-bility,it does improve transient response.3.Required if regulator is located an appreciabledis-tance from power supply filter.V XXI O=+I dR1Figure 15:Circuit for Increasing Output Voltage.Figure 16:Adjustable Output Regulator(7to 30V).Figure 17:0.5to 10V Regulator.Figure 18:High Current Voltage Regulator.V BEQ 1R 1=I Q 1I REQ –βQ 1V BEQ 1I O =I REG +Q 1[I REG –]R 1R 4V O =V XXR 1I R1≥5I d R 2V 0=V XX (1+)+I d R 2R 1Figure 19:High Output Current with Short CircuitProtection.Figure 20:Tracking Voltage Regulator.V BEQ 2R SC =I SCFigure21:Positive and Negative Regulator.Figure22:Negative Output Voltage Circuit. (*)D1and D2are necessary if the load is connected be-tween+V0and–V0.Figure23:Switching Regulator.Figure24:High Input Voltage Circuit.V IN=V i–(V Z+V BE)Figure25:High Input Voltage Circuit.Figure26:High Output VoltageRegulator. V IN=V Z-V BEFigure 27:High Input and Output Voltage.Figure 28:Reducing Power Dissipation withDropping Resistor.V O =V XX +V Z1V i(min)–V XX –V DROP(max)R =I O(max)+I d(max)Figure 29:Remote Shuntdown.Figure 30:Power AM Modulator (unity voltagegain,Io ≤1A).Note :The circuit performs well up to 100KHz.Figure 31:Adjustable Output Voltage with Tem-perature Compensation.Note :Q 2is connected as a diode in order to compensatethe variati on of the Q 1V BE with the temperature.C allows a slow rise-time of the V OR 2V O =V XX (1+)+V BE R 1Figure32:Light Controllers(V o min=V xx+V BE).V O falls when the light goes up V O rises when the light goes up Figure33:Protection against Input Short-circuitwith High Capacitance Loads.Applications with high capacitance loads and anoutput voltage greater than6volts need an externaldiode(see fig.33)to protect the device against inputshort circuit.In this case the input voltage fallsrapidly while the output voltage decreases showly.The capacitance discharges by means of the Base-Emitter junction of the series pass transistor in theregulator.If the energy is sufficiently high,the tran-sistor may be destroyed.The external diode by-passes the current from the IC to ground.DIM.mm inchMIN.TYP.MAX.MIN.TYP.MAX. A11.0013.100.4330.516 B0.97 1.150.0380.045 C 1.50 1.650.0590.065 D8.328.920.3270.351 E19.0020.000.7480.787 G10.7011.100.4210.437 N16.5017.200.6490.677 P25.0026.000.984 1.023 R 4.00 4.090.1570.161 U38.5039.30 1.515 1.547 V30.0030.30 1.187 1.193CDN BVUR APEGOP003F TO-3MECHANICAL DATADIM.mminch MIN.TYP.MAX.MIN.TYP.MAX.A 4.40 4.600.1730.181C 1.23 1.320.0480.051D 2.402.720.0940.107D1 1.270.050E 0.490.700.0190.027F 0.610.880.0240.034F1 1.14 1.700.0440.067F2 1.14 1.700.0440.067G 4.95 5.150.1940.203G1 2.4 2.70.0940.106H210.010.400.3930.409L216.40.645L413.014.00.5110.551L5 2.65 2.950.1040.116L615.215.90.5980.625L7 6.2 6.60.2440.260L9 3.5 4.20.1370.165DIA.3.75 3.850.1470.151L6ACDED 1FGL7L2Dia.F 1L5L4H 2L9F 2G 1TO-220MECHANICAL DATAP011C元器件交易网L78S00SERIES Information furnished is believed to be accurate and reliable.However,SGS-THOMSON Microelectronics assumes no responsability for theconsequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use.Nolicense is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.Specificationsmentionedin this publication are subject to change without notice.This publication supersedes and replaces all information previously supplied.SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without expresswritten approval of SGS-THOMSON Microelectonics.©1994SGS-THOMSON Microelectronics-All Rights ReservedSGS-THOMSON Microelectronics GROUP OF COMPANIESAustralia-Brazil-France-Germany-Hong Kong-Italy-Japan-Korea-Malaysia-Malta-Morocco-The Netherlands-Singapore-Spain-Sweden-Switzerland-Taiwan-Thailand-United Kingdom-U.S.A21/21。

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超详细的7805简介与使用说明

超详细的7805简介与使用说明


换用 LT1528，电流可达 3A /2005/2005-10-25/20051025155406.html
这里不是输出电流大小的问题 你换了 3A 的如果散热条件不改的话一样会发热 用 7805 一个就够了 加大散热片吧 用 7805 并联也只是增大了散热面积而已，不过增加的不大。 还有你最前面是用交流整流供电，再稳压至 12V 再稳压至 5V 吗？ 给你几种方案自己选 1。如果你的变压器是双 6V 三线的。那么二边二根线桥式整流再用二个等值滤波电容串联作滤波，变 压器中间的线接到二个电容连接的地方，其实就是组成以变压器中间线为地的正负双电压。在双 8。2V 左 右，以负 8。2V 为参考点，滤波电容中点为 8。2V，另一个滤波电容另一个脚为 16。4V，分别接 7805 和 7812 作稳压 2。如果你变压器是单 12V 的，那可以桥式整流出来给 7812，半波整流出来给 7805， 3。用电感降压，不过不推荐！不说详细 如果你就是用蓄电池供电的话那当我上面都没说 这里又有二种方案 1。给 7805 加大散热片 2。用开关稳压模块。（又分二种，1）稳压到 7。5V 左右再用 7805 稳压。2）直接稳压至 5V，选性 能好一点的） 还有后面的人补充吧。
U2=
UI 8.6 7.3V 7.5V 1.2 1.2
所以变压器的输出电压取 7.5V
整流滤波电路的等效负载：
R
(2)桥式整流二极管参数要求 正向平均电流:
, L

1.2 7.5 83.3 108
I
F
ID
RM
1 108 IO 54mA 2 2
最大反向电压：
U
U RMAX 2 7.5 10.6V
3
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LM78L05C中文资料

LM78L05C中文资料

3-TERMINAL 0.1A POSITIVE VOLTAGE REGULATORSThis series of fixed-voltage monolithic integrated-circuitvoltage regulators is designed for a wide range ofapplications.These applications include on-card regulation forelimination of noise and distribution problems associatedwith single-point regulation.In addition, they can be used with power-pass elementsto make high current voltage regulators.Each of these regulators can deliver up to 100㎃ of outputcurrent.The internal limiting and thermal shutdown features ofthese regulators make them essentially immune to overload.When used as a replacement for a zener diode-resistor com-bination, an effective improvement in output impedancecan be obtained together with lower-bias current.ORDERING INFORMATIONDevice Marking PackageLM78LXX LM78LXXTO-92 FEATURES LM78L05 /A /C LM78L05 /A /C◇ Output Current Up to 100㎃LM78L05NF805SOT-89◇ No External Components LM78L05AF/CF◇ Internal Thermal Overload Protection LM78L06F~24F806~824◇ Internal Short-Circuit Limiting XX = Output Voltage or Grade◇ Output Voltage of 5V, 6V, 8V, 9V, 10V, 12V, 15V, 18Vand 24VABSOLUTE MAXIMUM RATINGSCharacteristic Symbol Value UnitInput voltage LM78L05 /A/C∼ LM78L10V I30V LM78L12 ∼ LM78L1835LM78L2440Operating junction temperature Topr0 ∼ +150℃Storage temperature Tstg-65 ∼ +150Soldering temperature and time Tsol260/10secMar. 2006 - Rev 06 HTCRECOMMENDED OPERATING CONDITIONSMin.Max.UnitInput Voltage V I7LM78L05 / A / C20V LM78L06820LM78L0810.523LM78L0911.524LM78L1012.525LM78L1214.527LM78L1517.530LM78L1820.533LM78L2426.539Output current,Io100㎃perating virtual junction temperature, 0125℃TYPICAL APPLICATIONNotes1. To specify an output voltage, substitute voltage for "XX"2. Bypass capacitors are recommended for optimum stability and transient response and should be located as close as possible to the regulators.LM78L05 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=10V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃ 4.85 5.21㎃≤I O≤40㎃0℃ ∼ 125℃4.7555.25V 7V≤V I≤20V1㎃≤I O≤70㎃ 4.755 5.25Line regulation Reg line 7V≤V I≤20V25℃32150㎷8V≤V I≤20V26100Load regulation Reg load 1㎃≤I O≤100㎃25℃1560㎷1㎃≤I O≤40㎃830Bias current I B25℃ 3.86㎃125℃ 5.5Bias current change△I B9V≤V I≤20V0℃ ∼ 125℃ 1.5㎃1㎃≤I O≤40㎃0.1 Output noise voltage V N10Hz≤f≤100kHz25℃42㎶Ripple rejection RR 8V≤V I≤18Vf=120Hz25℃4149㏈Dropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTCLM78L05A ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=10V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃ 4.95 5.11㎃≤I O≤40㎃0℃ ∼ 125℃4.955.1V 7V≤V I≤20V1㎃≤I O≤70㎃ 4.95 5.1Line regulation Reg line 7V≤V I≤20V25℃550㎷8V≤V I≤20V325Load regulation Reg load1㎃≤I O≤100㎃25℃1560㎷1㎃≤I O≤40㎃830Bias current I B25℃ 3.86㎃125℃ 5.5Bias current change△I B9V≤V I≤20V0℃ ∼ 125℃1.5㎃1㎃≤I O≤40㎃0.1Output noise voltage V N10Hz≤f≤100kHz25℃42㎶Ripple rejection RR 8V≤V I≤18Vf=120Hz25℃4149㏈Dropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTCLM78L05C ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=10V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃ 4.955 5.051㎃≤I O≤40㎃0℃ ∼ 125℃4.9555.05V 7V≤V I≤20V1㎃≤I O≤70㎃ 4.955 5.05Line regulation Reg line 7V≤V I≤20V25℃550㎷8V≤V I≤20V325Load regulation Reg load1㎃≤I O≤100㎃25℃1550㎷1㎃≤I O≤40㎃825 Bias current I B25℃ 3.86㎃125℃ 5.5Bias current change△I B9V≤V I≤20V0℃ ∼ 125℃ 1.5㎃1㎃≤I O≤40㎃0.1 Output noise voltage V N10Hz≤f≤100kHz25℃42㎶Ripple rejection RR 8V≤V I≤18Vf=120Hz25℃4149㏈Dropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTCLM78L06 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=10V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃ 5.756 6.251㎃≤I O≤40㎃0℃ ∼ 125℃5.766.3V 8V≤V I≤20V1㎃≤I O≤70㎃ 5.76 6.3Line regulation Reg line 8V≤V I≤20V25℃35175㎷9V≤V I≤20V29125Load regulation Reg load 1㎃≤I O≤100㎃25℃1680㎷1㎃≤I O≤40㎃940Bias current I B25℃ 3.96㎃125℃ 5.5Bias current change△I B9V≤V I≤20V0℃ ∼ 125℃1.5㎃1㎃≤I O≤40㎃0.1Output noise voltage V N10Hz≤f≤100kHz25℃46㎶Ripple rejection RR 9V≤V I≤19V25℃4048㏈f=120HzDropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTCLM78L08 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=14V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.Unit25℃7.788.3Output voltage **V OUT1㎃≤I O≤40㎃0℃ ∼ 125℃7.688.4V10.5V≤V I≤23V1㎃≤I O≤70㎃7.688.4Line regulation Reg line10.5V≤V I≤23V25℃42175㎷11V≤V I≤23V36125Load regulation Reg load1㎃≤I O≤100㎃25℃1880㎷1㎃≤I O≤40㎃1040Bias current I B25℃46㎃125℃ 5.5Bias current change△I B11V≤V I≤23V0℃ ∼ 125℃ 1.5㎃1㎃≤I O≤40㎃0.1Output noise voltage V N10Hz≤f≤100kHz25℃54㎶Ripple rejection RR13V≤V I≤23V25℃3746㏈f=120HzDropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTCLM78L09 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=16V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.Unit25℃8.699.4Output voltage **V OUT1㎃≤I O≤40㎃0℃ ∼ 125℃8.5599.45V12V≤V I≤24V1㎃≤I O≤70㎃8.5599.45Line regulation Reg line12V≤V I≤24V25℃45175㎷13V≤V I≤24V40125Load regulation Reg load1㎃≤I O≤100㎃25℃1990㎷1㎃≤I O≤40㎃1140Bias current I B25℃ 4.16㎃125℃ 5.5Bias current change△I B13V≤V I≤24V0℃ ∼ 125℃ 1.5㎃1㎃≤I O≤40㎃0.1Output noise voltage V N10Hz≤f≤100kHz25℃58㎶Ripple rejection RR13V≤V I≤23V25℃3845㏈f=120HzDropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTCLM78L10 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=17V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃9.61010.41㎃≤I O≤40㎃0℃ ∼ 125℃9.51010.5V 13V≤V I≤25V1㎃≤I O≤70㎃9.51010.5Line regulation Reg line 13V≤V I≤25V25℃51175㎷14V≤V I≤25V42125Load regulation Reg load 1㎃≤I O≤100㎃25℃2090㎷1㎃≤I O≤40㎃1140Bias current I B25℃ 4.26㎃125℃ 5.5Bias current change△I B 14V≤V I≤25V0℃ ∼ 125℃1.5㎃1㎃≤I O≤40㎃0.1Output noise voltage V N10Hz≤f≤100kHz25℃62㎶Ripple rejection RR 15V≤V I≤25Vf=120Hz25℃3744㏈Dropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTCLM78L12 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=19V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃11.51212.51㎃≤I O≤40㎃0℃ ∼ 125℃11.41212.6V 14V≤V I≤27V1㎃≤I O≤70㎃11.41212.6Line regulation Reg line 14.5V≤V I≤27V25℃55250㎷16V≤V I≤27V49200Load regulation Reg load 1㎃≤I O≤100㎃25℃22100㎷1㎃≤I O≤40㎃1350Bias current I B25℃ 4.3 6.5㎃125℃6Bias current change△I B 16V≤V I≤27V0℃ ∼ 125℃1.5㎃1㎃≤I O≤40㎃0.1Output noise voltage V N10Hz≤f≤100kHz25℃70㎶Ripple rejection RR 15V≤V I≤25Vf=120Hz25℃3742㏈Dropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTCLM78L15 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=23V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃14.41515.61㎃≤I O≤40㎃0℃ ∼ 125℃14.251515.75V 17.5V≤V I≤30V1㎃≤I O≤70㎃14.251515.75Line regulation Reg line 17.5V≤V I≤30V25℃65300㎷19V≤V I≤30V58250Load regulation Reg load 1㎃≤I O≤100㎃25℃25150㎷1㎃≤I O≤40㎃1575Bias current I B25℃ 4.2 6.5㎃125℃6Bias current change△I B 19V≤V I≤30V0℃ ∼ 125℃1.5㎃1㎃≤I O≤40㎃0.1Output noise voltage V N10Hz≤f≤100kHz25℃82㎶Ripple rejection RR 18.5V≤V I≤28.5Vf=120Hz25℃3744㏈Dropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTC36LM78L18 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=26V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃17.31818.71㎃≤I O≤40㎃0℃ ∼ 125℃17.11818.9V 20.5V≤V I≤33V1㎃≤I O≤70㎃17.11818.9Line regulation Reg line 20.5V≤V I≤33V25℃70360㎷22V≤V I≤33V64300Load regulation Reg load 1㎃≤I O≤100㎃25℃27180㎷1㎃≤I O≤40㎃1990Bias current I B25℃ 4.7 6.5㎃125℃6Bias current change△I B 22V≤V I≤33V0℃ ∼ 125℃1.5㎃1㎃≤I O≤40㎃0.1Output noise voltage V N10Hz≤f≤100kHz25℃82㎶Ripple rejection RR 21.5V≤V I≤31.5Vf=120Hz25℃3236㏈Dropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTC37LM78L24 ELECTRICAL CHARACTERISTICS(At specified virtual junction temperature, V I=32V, I O=40㎃ (unless otherwise noted)Characteistic Symbol Test condition *Min.Typ.Max.UnitOutput voltage **V OUT25℃2324251㎃≤I O≤40㎃0℃ ∼ 125℃22.82425.2V 26.5V≤V I≤39V1㎃≤I O≤70㎃22.82425.2Line regulation Reg line 26.5V≤V I≤39V25℃95480㎷29V≤V I≤39V78400Load regulation Reg load 1㎃≤I O≤100㎃25℃41240㎷1㎃≤I O≤40㎃28120Bias current I B25℃ 4.8 6.5㎃125℃6Bias current change△I B28V≤V I≤39V0℃ ∼ 125℃ 1.5㎃1㎃≤I O≤40㎃0.1 Output noise voltage V N10Hz≤f≤100kHz25℃82㎶Ripple rejection RR 27.5V≤V I≤37.5Vf=120Hz25℃3033㏈Dropout voltage V D25℃ 1.7VNotes*. Pulse testing techniques are used to maintain the junction temperature as close to theambient temperature as possible.Thermal effects must be taken into account separately.All characteristics are measured with a 0.33㎌ capacitor across the input and a 0.1㎌capacitor across the output.**. This specification applies only for DC power dissipation permitted by absolute maximumratings.Mar. 2006 - Rev 06 HTC38。

78L05中文资料

78L05中文资料

TO-92 SOT-891. VOUT2. GND3. GND4. NC5. NC6. GND7. GND8.VINSOP-8CYT78L05GND10uF 10uF最大的额定值:参数符号 额定值 单位功耗 P 0.75 W 输入电压 V IN 18V 封装热阻抗 ӨJA 150(TO-92) ℃/W 烙铁焊接温度 (10秒) T LEAD 260℃ 工作温度范围 T J 0 to +125 ℃ 存储温度 T STG-65 to +150℃静电防护V ESD 2.7KV电性能参数：VIN = 10V; IOUT = 10mA; CIN = 0.33µF; COUT = 0.1µF TJ = 25°C; 有特殊说明的除外。

符号参数测试条件最小值典型值最大值单位V OUT 输出电压4.8 55.2 V△V OUT /V OUT 空载调整率 7V ≤ V IN ≤ 18V -- 11 45 △V OUT /V OUT负载调整率(5) 1mA ≤ I OUT ≤ 100mA -- 5 50 mVI Q 静态电流 -- 4.3 68V ≤ V IN ≤ 18V -- 1.1 -- △I Q 静态电流调整率 1mA ≤ I OUT ≤ 40mA--0.13--mA△V IN /V OUT输出纹波抑制 F=120Hz , 8V ≤ V IN ≤16V -- 62 -- dB I PK 最大输出电流 -- 150 -- mA△V OUT /△T 输出电压温度系数 I OUT =5mA --0.66 -- MV/℃V IN (Min) 空载最小输入电压-- 6.1 6.4 V静态电流与输入电压静态电流嗻mA 嗼输入电压（V ） 结温（℃） 静态电流嗻mA 嗼静态电流与结温压差与结温压差嗻V 嗼结温（℃） 压差：△V OUT ＝2％压差与输出电流压差嗻V 嗼输出电流（mA ）纹波抑制纹波抑制嗻dB 嗼封装尺寸图: TO-92封装尺寸图: SOP-8尺寸英制（in ） 公制(mm) 编号 最小 最大最小 最大A 0.175 0.205 4.445 5.207B 0.170 0.210 4.318 5.334 E 0.500 0.610 12.70 15.50 F 0.016 0.021 0.407 0.533 G 0.045 0.055 1.143 1.397 H 0.095 0.105 2.413 2.667 J 0.080 0.105 2.032 2.667 K0.125 0.165 3.175 4.191尺寸英制（in ） 公制(mm) 编号 最小 最大最小 最大A 0.05320.0688 0.35 1.75 A1 0.00400.0098 0.10 0.25B 0.01300.0200 0.33 0.51 B1 0.050BSC 1.27BSCC 0.00750.0098 0.19 0.25D 0.18900.1968 4.80 5.00 H 0.22840.2440 5.80 6.20 E0.14970.1574 3.80 4.00封装尺寸图: SOT-89英制（in）公制(mm)编号最小最大最小最大A 0.173 0.181 4.400 4.600B 0.159 0.167 4.050 4.250C 0.067 0.075 1.700 1.900D 0.051 0.059 1.300 1.500E 0.094 0.102 2.400 2.600F 0.035 0.047 0.890 1.200G 0.118REF 3.00REFH 0.059REF 1.50REFI 0.016 0.020 0.400 0.520J 0.055 0.063 1.400 1.600K 0.014 0.016 0.350 0.410L 10°TYP 10°TYPM 0.028REF 0.70REF。

MC78L05A中文资料

MC78L05A中文资料

SHORT CIRCUIT PROTECTION
RSC
V0 1
交易网
MC78LXXA (LM78LXX, KA78LXXA)
FIXED VOLTAGE REGULATOR (POSITIVE)
ABSOLUTE MAXIMUM RATINGS (TA = 25 °C, unless otherwise specified)
11.5V ≤ VI ≤ VMAX (Note 2)
1mA ≤ IO ≤ 70mA
TJ = 25 °C
13V ≤ VI ≤ 24V 1mA ≤ IO ≤ 40mA
TA = 25 °C, 10Hz ≤ f ≤ 100KHz
∆VO/∆T IO = 5mA
RR f = 120Hz, 12V ≤ VI ≤ 22V, TJ = 25 °C VD TJ = 25 °C
MC78LXXACD (KA78LXXAD)
Package TO-92 8 SOP
Operating Temperature - 45 ~ + 125°C ° 0 ~ + 125°C
BLOCK DIAGRAM
VI 3
I
REFERENCE VOLTAGE
+
-
GND 2
THERMAL SHUTDOWN CIRCUIT
Load Regulation Output Voltage
Quiescent Current
Quiescent Current with line
Change
with load
Output Noise Voltage
VO TJ = 25 °C
∆VO TJ =25 °C
12.5 < VI < 25V 14V ≥ VI ≥ 25V