LM7815C

L7800SERIESPOSITIVE VOLTAGE REGULATORSJanuary 1997s OUTPUT CURRENT UP TO 1.5AsOUTPUT VOLTAGES OF 5;5.2;6;8;8.5;9;12;15;18;24Vs THERMAL OVERLOAD PROTECTION s SHORT CIRCUIT PROTECTIONsOUTPUT TRANSITION SOA PROTECTIONDESCRIPTIONThe L7800series of three-terminal positive regulators is available in TO-220ISOWATT220TO-3and D 2PAK packages and several fixed output voltages,making it useful in a wide range of applications.These regulators can provide local on-card regulation,eliminating the distribution problems associated with single point regulation.Each type employs internal current limiting,thermal shut-down and safe area protection,making it essentially indestructible.If adequate heat sinking is provided,they can deliver over 1A output current.Although designed primarily as fixed voltage regulators,these devices can be used with external components to obtain adjustable voltages and currents.12TO-3123TO-220ISOWATT22012313D 2PAKBLOCK DIAGRAM1/25CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)TO-220&ISOWATT220TO-3D 2PAKTHERMAL DATASymbolParameterD 2PAK TO-220ISOWATT220TO-3UnitR t hj-case R th j-a mb Thermal Resistance Junction-case Max Thermal Resistance Junction-ambient Max 362.5350460435o C/W oC/WType TO-220D 2PAK (*)ISOWATT220TO-3Output VoltageL7805L7805C L7852C L7806L7806C L7808L7808C L7885C L7809C L7812L7812C L7815L7815C L7818L7818C L7820L7820C L7824L7824CL7805CV L7852CV L7806CV L7808CV L7885CV L7809CV L7812CV L7815CV L7818CV L7820CV L7824CVL7805CD2T L7852CD2T L7806CD2T L7808CD2T L7885CD2T L7809CD2T L7812CD2T L7815CD2T L7818CD2T L7820CD2T L7824CD2TL7805CP L7852CP L7806CP L7808CP L7885CP L7809CP L7812CP L7815CP L7818CP L7820CP L7824CPL7805T L7805CT L7852CT L7806T L7806CT L7808T L7808CT L7885CT L7809CT L7812T L7812CT L7815T L7815CT L7818T L7818CT L7820T L7820CT L7824T L7824CT5V 5V 5.2V 6V 6V 8V 8V 8.5V 9V 12V 12V 15V 15V 18V 18V 20V 20V 24V 24V(*)AVAILABLE IN TAPE AND REEL WITH ”-TR”SUFFIXABSOLUTE MAXIMUM RATINGSSymbol ParameterValue Unit V i DC Input Voltage (for V O =5to 18V)(for V O =20,24V)3540V VI o Output Current Internally limited P t ot Power DissipationInternally limited T o p Operating Junction Temperature Range (for L7800)(for L7800C )-55to 1250to 150o C o C T stgStorage Temperature Range-40to 150oCL78002/25L7800 APPLICATION CIRCUITSCHEMATIC DIAGRAM3/25TEST CIRCUITSFigure3:Ripple Rejection.Figure2:Load Regulation.Figure1:DC Parameter L78004/25ELECTRICAL CHARACTERISTICS FOR L7806(refer to the test circuits,T j =-55to 150o C,V i =15V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 5.756 6.25V V o Output Voltage I o =5mA to 1A P o ≤15WV i =9to 21V 5.6566.35V ∆V o *Line Regulation V i =8to 25V T j =25oCV i =9to 13VT j =25oC6030mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC10030mV mV I d Quiescent Current T j =25o C 6mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =9to 25V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA0.7mV/oCeN Output Noise Voltage B =10Hz to 100KHz T j =25oC 40µV/V O SVR Supply Voltage Rejection V i =9to 19V f =120Hz65dB V d Dropout Voltage I o =1A T j =25o C2 2.5V R o Output Resistance f =1KHz 19m ΩI sc Short Circuit Current V i =35V T j =25oC0.75 1.2A I s cpShort Circuit Peak CurrentT j =25o C1.32.23.3AELECTRICAL CHARACTERISTICS FOR L7805(refer to the test circuits,T j =-55to 150o C,V i =10V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 4.85 5.2V V o Output Voltage I o =5mA to 1A P o ≤15WV i =8to 20V 4.655 5.35V ∆V o *Line Regulation V i =7to 25V T j =25o CV i =8to 12VT j =25oC315025mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC10025mV mV I d Quiescent Current T j =25o C 6mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =8to 25V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA0.6mV/oCeN Output Noise Voltage B =10Hz to 100KHz T j =25o C 40µV/V O SVR Supply Voltage Rejection V i =8to 18V f =120Hz68dB V d Dropout Voltage I o =1A T j =25oC 2 2.5V R o Output Resistance f =1KHz 17m ΩI sc Short Circuit Current V i =35V T j =25oC0.75 1.2A I s cpShort Circuit Peak CurrentT j =25oC1.32.23.3A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.L78005/25ELECTRICAL CHARACTERISTICS FOR L7812(refer to the test circuits,T j =-55to 150o C,V i =19V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC11.51212.5V V o Output Voltage I o =5mA to 1A P o ≤15W V i =15.5to 27V11.41212.6V ∆V o *Line Regulation V i =14.5to 30V T j =25oCV i =16to 22V T j =25oC 12060mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC10060mV mV I d Quiescent Current T j =25o C 6mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =15to 30V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA1.5mV/oCeN Output Noise Voltage B =10Hz to 100KHz T j =25o C 40µV/V O SVR Supply Voltage Rejection V i =15to 25V f =120Hz61dB V d Dropout Voltage I o =1A T j =25o C2 2.5V R o Output Resistance f =1KHz 18m ΩI sc Short Circuit Current V i =35V T j =25oC0.75 1.2A I s cpShort Circuit Peak CurrentT j =25o C1.32.23.3AELECTRICAL CHARACTERISTICS FOR L7808(refer to the test circuits,T j =-55to 150o C,V i =14V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC7.788.3V V o Output Voltage I o =5mA to 1A P o ≤15W V i =11.5to 23V7.688.4V ∆V o *Line Regulation V i =10.5to 25V T j =25o CV i =11to 17V T j =25oC 8040mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC10040mV mV I d Quiescent Current T j =25o C 6mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =11.5to 25V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA1mV/oCeN Output Noise Voltage B =10Hz to 100KHz T j =25o C 40µV/V O SVR Supply Voltage Rejection V i =11.5to 21.5V f =120Hz62dB V d Dropout Voltage I o =1A T j =25oC 2 2.5V R o Output Resistance f =1KHz 16m ΩI sc Short Circuit Current V i =35V T j =25oC0.75 1.2A I s cpShort Circuit Peak CurrentT j =25oC1.32.23.3A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.L78006/25ELECTRICAL CHARACTERISTICS FOR L7818(refer to the test circuits,T j =-55to 150o C,V i =26V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 17.31818.7V V o Output Voltage I o =5mA to 1A P o ≤15W V i =22to 33V 17.11818.9V ∆V o *Line Regulation V i =21to 33V T j =25oCV i =24to 30VT j =25oC18090mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC18090mV mV I d Quiescent Current T j =25o C 6mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =22to 33V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA2.3mV/oCeN Output Noise Voltage B =10Hz to 100KHz T j =25oC 40µV/V O SVR Supply Voltage Rejection V i =22to 32V f =120Hz59dB V d Dropout Voltage I o =1A T j =25o C2 2.5V R o Output Resistance f =1KHz 22m ΩI sc Short Circuit Current V i =35V T j =25oC0.75 1.2A I s cpShort Circuit Peak CurrentT j =25o C1.32.23.3AELECTRICAL CHARACTERISTICS FOR L7815(refer to the test circuits,T j =-55to 150o C,V i =23V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC14.41515.6V V o Output Voltage I o =5mA to 1A P o ≤15W V i =18.5to 30V14.251515.75V ∆V o *Line Regulation V i =17.5to 30V T j =25o CV i =20to 26V T j =25oC 15075mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC15075mV mV I d Quiescent Current T j =25o C 6mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =18.5to 30V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA1.8mV/oCeN Output Noise Voltage B =10Hz to 100KHz T j =25o C 40µV/V O SVR Supply Voltage Rejection V i =18.5to 28.5V f =120Hz60dB V d Dropout Voltage I o =1A T j =25oC 2 2.5V R o Output Resistance f =1KHz 19m ΩI sc Short Circuit Current V i =35V T j =25oC0.75 1.2A I s cpShort Circuit Peak CurrentT j =25oC1.32.23.3A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.L78007/25ELECTRICAL CHARACTERISTICS FOR L7824(refer to the test circuits,T j =-55to 150o C,V i =33V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 232425V V o Output Voltage I o =5mA to 1A P o ≤15W V i =28to 38V 22.82425.2V ∆V o *Line Regulation V i =27to 38V T j =25oCV i =30to 36VT j =25oC240120mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC240120mV mV I d Quiescent Current T j =25o C 6mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =28to 38V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA3mV/oCeN Output Noise Voltage B =10Hz to 100KHz T j =25oC 40µV/V O SVR Supply Voltage Rejection V i =28to 38V f =120Hz56dB V d Dropout Voltage I o =1A T j =25o C2 2.5V R o Output Resistance f =1KHz 28m ΩI sc Short Circuit Current V i =35V T j =25oC0.75 1.2A I s cpShort Circuit Peak CurrentT j =25o C1.32.23.3AELECTRICAL CHARACTERISTICS FOR L7820(refer to the test circuits,T j =-55to 150o C,V i =28V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 19.22020.8V V o Output Voltage I o =5mA to 1A P o ≤15WV i =24to 35V192021V ∆V o *Line Regulation V i =22.5to 35V T j =25o CV i =26to 32V T j =25oC 200100mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC200100mV mV I d Quiescent Current T j =25o C 6mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =24to 35V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA2.5mV/oCeN Output Noise Voltage B =10Hz to 100KHz T j =25o C 40µV/V O SVR Supply Voltage Rejection V i =24to 35V f =120Hz58dB V d Dropout Voltage I o =1A T j =25oC 2 2.5V R o Output Resistance f =1KHz 24m ΩI sc Short Circuit Current V i =35V T j =25oC0.75 1.2A I s cpShort Circuit Peak CurrentT j =25oC1.32.23.3A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.L78008/25ELECTRICAL CHARACTERISTICS FOR L7852C (refer to the test circuits,T j =0to 125o C,V i =10V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 5.0 5.2 5.4V V o Output Voltage I o =5mA to 1A P o ≤15WV i =8to 20V 4.955.2 5.45V ∆V o *Line Regulation V i =7to 25V T j =25oCV i =8to 12VT j =25oC3110552mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC10552mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =7to 25V 1.3mA ∆V o ∆T Output Voltage Drift I o =5mA-1.0mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25oC 42µV SVR Supply Voltage Rejection V i =8to 18V f =120Hz61dB V d Dropout Voltage I o =1A T j =25o C2V R o Output Resistance f =1KHz 17m ΩI sc Short Circuit Current V i =35V T j =25oC750mA I s cpShort Circuit Peak CurrentT j =25o C2.2AELECTRICAL CHARACTERISTICS FOR L7805C (refer to the test circuits,T j =0to 125o C,V i =10V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 4.85 5.2V V o Output Voltage I o =5mA to 1A P o ≤15WV i =7to 20V 4.755 5.25V ∆V o *Line Regulation V i =7to 25V T j =25o CV i =8to 12VT j =25oC3110050mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC10050mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =7to 25V 0.8mA ∆V o ∆T Output Voltage Drift I o =5mA-1.1mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 40µV SVR Supply Voltage Rejection V i =8to 18V f =120Hz62dB V d Dropout Voltage I o =1A T j =25oC2V R o Output Resistance f =1KHz 17m ΩI sc Short Circuit Current V i =35V T j =25oC750mA I s cpShort Circuit Peak CurrentT j =25oC2.2A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.L78009/25ELECTRICAL CHARACTERISTICS FOR L7808C (refer to the test circuits,T j =0to 125o C,V i =14V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC7.788.3V V o Output Voltage I o =5mA to 1A P o ≤15W V i =10.5to 25V7.688.4V ∆V o *Line Regulation V i =10.5to 25V T j =25oCV i =11to 17V T j =25oC 16080mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC16080mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =10.5to 25V 1mA ∆V o ∆T Output Voltage Drift I o =5mA-0.8mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 52µV SVR Supply Voltage Rejection V i =11.5to 21.5V f =120Hz56dB V d Dropout Voltage I o =1A T j =25o C2V R o Output Resistance f =1KHz 16m ΩI sc Short Circuit Current V i =35V T j =25oC450mA I s cpShort Circuit Peak CurrentT j =25o C2.2AELECTRICAL CHARACTERISTICS FOR L7806C (refer to the test circuits,T j =0to 125o C,V i =11V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 5.756 6.25V V o Output Voltage I o =5mA to 1A P o ≤15WV i =8to 21V 5.766.3V ∆V o *Line Regulation V i =8to 25V T j =25o CV i =9to 13VT j =25oC12060mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC12060mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =8to 25V 1.3mA ∆V o ∆T Output Voltage Drift I o =5mA-0.8mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 45µV SVR Supply Voltage Rejection V i =9to 19V f =120Hz59dB V d Dropout Voltage I o =1A T j =25oC 2V R o Output Resistance f =1KHz 19m ΩI sc Short Circuit Current V i =35V T j =25oC550mA I s cpShort Circuit Peak CurrentT j =25oC2.2A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.L780010/25ELECTRICAL CHARACTERISTICS FOR L7809C (refer to the test circuits,T j =0to 125o C,V i =15V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC8.6599.35V V o Output Voltage I o =5mA to 1A P o ≤15W V i =11.5to 26V8.5599.45V ∆V o *Line Regulation V i =11.5to 26V T j =25oCV i =12to 18V T j =25oC 18090mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC18090mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =11.5to 26V 1mA ∆V o ∆T Output Voltage Drift I o =5mA-1.0mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 70µV SVR Supply Voltage Rejection V i =12to 23V f =120Hz55dB V d Dropout Voltage I o =1A T j =25o C2V R o Output Resistance f =1KHz 17m ΩI sc Short Circuit Current V i =35V T j =25oC400mA I s cpShort Circuit Peak CurrentT j =25o C2.2AELECTRICAL CHARACTERISTICS FOR L7885C (refer to the test circuits,T j =0to 125o C,V i =14.5V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 8.28.58.8V V o Output Voltage I o =5mA to 1A P o ≤15WV i =11to 26V8.18.58.9V ∆V o *Line Regulation V i =11to 27V T j =25o CV i =11.5to 17.5V T j =25oC 16080mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC16080mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =11to 27V 1mA ∆V o ∆T Output Voltage Drift I o =5mA-0.8mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 55µV SVR Supply Voltage Rejection V i =12to 22V f =120Hz56dB V d Dropout Voltage I o =1A T j =25oC2V R o Output Resistance f =1KHz 16m ΩI sc Short Circuit Current V i =35V T j =25oC450mA I s cpShort Circuit Peak CurrentT j =25oC2.2A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.11/25ELECTRICAL CHARACTERISTICS FOR L7815C (refer to the test circuits,T j =0to 125o C,V i =23V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC14.41515.6V V o Output Voltage I o =5mA to 1A P o ≤15W V i =17.5to 30V14.251515.75V ∆V o *Line Regulation V i =17.5to 30V T j =25oCV i =20to 26V T j =25oC 300150mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC300150mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =17.5to 30V 1mA ∆V o ∆T Output Voltage Drift I o =5mA-1mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 90µV SVR Supply Voltage Rejection V i =18.5to 28.5V f =120Hz54dB V d Dropout Voltage I o =1A T j =25o C2V R o Output Resistance f =1KHz 19m ΩI sc Short Circuit Current V i =35V T j =25oC230mA I s cpShort Circuit Peak CurrentT j =25o C2.1AELECTRICAL CHARACTERISTICS FOR L7812C (refer to the test circuits,T j =0to 125o C,V i =19V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC11.51212.5V V o Output Voltage I o =5mA to 1A P o ≤15W V i =14.5to 27V11.41212.6V ∆V o *Line Regulation V i =14.5to 30V T j =25o CV i =16to 22V T j =25oC 240120mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC240120mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =14.5to 30V 1mA ∆V o ∆T Output Voltage Drift I o =5mA-1mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 75µV SVR Supply Voltage Rejection V i =15to 25V f =120Hz55dB V d Dropout Voltage I o =1A T j =25oC2V R o Output Resistance f =1KHz 18m ΩI sc Short Circuit Current V i =35V T j =25oC350mA I s cpShort Circuit Peak CurrentT j =25o C2.2A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.12/25ELECTRICAL CHARACTERISTICS FOR L7820C (refer to the test circuits,T j =0to 125o C,V i =28V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 19.22020.8V V o Output Voltage I o =5mA to 1A P o ≤15WV i =23to 35V192021V ∆V o *Line Regulation V i =22.5to 35V T j =25oCV i =26to 32V T j =25oC 400200mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o CI o =250to 750mA T j =25oC400200mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =23to 35V 1mA ∆V o ∆T Output Voltage Drift I o =5mA-1mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25oC 150µV SVR Supply Voltage Rejection V i =24to 35V f =120Hz52dB V d Dropout Voltage I o =1A T j =25o C2V R o Output Resistance f =1KHz 24m ΩI sc Short Circuit Current V i =35V T j =25oC180mA I s cpShort Circuit Peak CurrentT j =25o C2.1AELECTRICAL CHARACTERISTICS FOR L7818C (refer to the test circuits,T j =0to 125o C,V i =26V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 17.31818.7V V o Output Voltage I o =5mA to 1A P o ≤15W V i =21to 33V 17.11818.9V ∆V o *Line Regulation V i =21to 33V T j =25o CV i =24to 30VT j =25oC360180mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC360180mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =21to 33V 1mA ∆V o ∆T Output Voltage Drift I o =5mA-1mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 110µV SVR Supply Voltage Rejection V i =22to 32V f =120Hz53dB V d Dropout Voltage I o =1A T j =25oC2V R o Output Resistance f =1KHz 22m ΩI sc Short Circuit Current V i =35V T j =25oC200mA I s cpShort Circuit Peak CurrentT j =25oC2.1A*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.13/25*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.ELECTRICAL CHARACTERISTICS FOR L7824C (refer to the test circuits,T j =0to 125o C,V i =33V,I o =500mA,C i =0.33µF,C o =0.1µF unless otherwise specified)Symbol ParameterTest Conditions Min.Typ.Max.Unit V o Output Voltage T j =25oC 232425V V o Output Voltage I o =5mA to 1A P o ≤15W V i =27to 38V 22.82425.2V ∆V o *Line Regulation V i =27to 38V T j =25o CV i =30to 36VT j =25oC480240mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25oCI o =250to 750mA T j =25oC480240mV mV I d Quiescent Current T j =25o C 8mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =27to 38V 1mA ∆V o ∆T Output Voltage Drift I o =5mA-1.5mV/oC eN Output Noise Voltage B =10Hz to 100KHz T j =25o C 170µV SVR Supply Voltage Rejection V i =28to 38V f =120Hz50dB V d Dropout Voltage I o =1A T j =25oC2V R o Output Resistance f =1KHz 28m ΩI sc Short Circuit Current V i =35V T j =25oC150mA I s cpShort Circuit Peak CurrentT j =25oC2.1A14/25Figure 8:Output Impedance vs.Frequency.Figure 9:Quiescent Current vs.JunctionTemperature.Figure 4:Dropout Voltage vs.JunctionTemperature.Figure 5:Peak Output Current vs.Input/outputDifferential Voltage.Figure 6:Supply Voltage Rejection vs.Frequency.Figure 7:Output Voltage vs.JunctionTemperature.15/25Figure12:Quiescent Current vs.InputVoltage.Figure13:Fixed Output Regulator.Figure14:Current Regulator. Figure10:Load Transient Response.Figure11:Line Transient Response.NOTE:1.To specify an output voltage,substitute voltage value for”XX”.2.Although no output capacitor is need for stability,it does improve transient response.3.Required if cregulator is locate an appreciable distance from power supply filter.I O=V XXR1+I d16/25Figure 15:Circuit for Increasing OutputVoltage.Figure 16:Adjustable Output Regulator(7to 30V).Figure 17:0.5to 10V Regulator.Figure 18:High Current Voltage Regulator.I R1≥5I d V O =V XX (1+R 2R 1)+I d R 2VO =V XXR 4R 1R 1=V BEQ 1I REQ −I Q 1βQ 1I O =I REG +Q 1(I REG −V BEQ 1R 1)17/25Figure 19:High Output Current with ShortCircuit Protection.Figure 20:Tracking Voltage Regulator.Figure 21:Split Power Supply (±15V –1A).Figure 22:Negative Output Voltage Circuit.Figure 23:Switching Regulator.Figure 24:High Input Voltage Circuit.V IN =V i -(V Z +V BE )*Against potential latch-up problems.R SC =V BEQ 2I SC18/25Figure 27:High Input and Output Voltage.Figure 28:Reducing Power Dissipation withDr opping Resistor.Figure 29:Remote Shutdown.Figure 25:High Input Voltage Circuit.Figure 26:High Output Voltage Regulator.V O =V XX +V Z1R =V i (min )−V XX −V DROP (max )I O (max )+I d (max )19/25Figure 30:Power AM Modulator (unity voltagegain,I o <1A).Figure 31:Adjustable Output Voltage withTemperatureCompensation.NOTE:The circuit performs well up to 100KHzNOTE:Q 2is connected as a diode in order to compensate the variation of the Q 1V BE with the temperature.C allows a slow rise-time of the V oFigure 32:Light Controllers (V o min =V xx +V BE ).Figure 33:Protection against Input Short-circuitwith High Capacitance Loads.Application with high capacitance loads and an output voltage greater than 6volts need an external diode (see fig.33)to protect the deviceagainst input short circuit.In this case the input voltage falls rapidly while the output voltage decrease slowly.The capacitance dischrges by means of the Base-Emitter junction of the series pass transistor in the regulator.If the energy is sufficently high,the transistor may be destroyed.The external diode by-passes the current from the IC to ground.V O falls when the light goes upV O rises when the light goes upV O =VXX(1+R 2R 1)+V BE 20/25。

LM79XX 系列固定输出三端稳压器LM79XX 系列固定输出三端稳压器:功能简介: LM79XX 系列是美国国家半导体公司的固定输出三端负稳压器集成电路。

我国和世界各大集成电路生产商均有同类产品可供选用，是使用极为广泛的一类串连集成稳压器.特性简介: 过热、短路和安全范围保护/ 高纹波抑制比/ 1.5A 输出电流。

电压范围:LM7905C -5V / LM7906C -6V / LM7908C -8V / LM7912C -12V / LM7918C -18V / LM7920C -20V / LM7924C -24V / LM7915C -15V封装形式:TO-220 塑料封装，TO-3 铝壳封装代换电路:以下各厂商的同型号电路均可直接代换。

国家半导体摩托罗拉仙童日电东芝日立上无七厂北京半导体五厂流静态电流变化mA With Line 0.5 0.5 0.5 V (-25≤V IN≤-7) (-30≤V IN≤-14.5) (-30≤V IN≤-17.5) mAWith Load5mA≤I OUT≤1A0.5 0.5 0.5输出噪声电压μVT A=25℃10Hz≤f≤100kHz125 300 375纹波电压抑制dBf=120Hz54 66 54 70 54 70V (-18≤V IN≤-8) (-25≤V IN≤-15) (-30≤V IN≤-17.5)输出电压漂移mV/℃0℃≤T J≤+100℃I OUT=5mA0.4 -0.8 -1.0压差V T J=25℃ 1.1 1.1 1.1输出峰值电流A T J=25℃ 2.2 2.2 2.2注2：除非另外说明：I OUT=500mA，C IN=2.2μF，C OUT=1μF，0℃≤T J≤+125℃，耗散功率≤1.5W。

稳压器在恒定结温下以低占空比脉冲测试。

典型电路:。

LM78XX/LM78XXA 3-Terminal 1A Positive Voltage Regulator May 2006The LM78XX series of three terminal positive regulators are available in the TO-220 package and with severalfixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area pro-tection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltageLM78XX/LM78XXA 3-Terminal 1A Positive Voltage RegulatorLM78XX/LM78XXA 3-Terminal 1A Positive Voltage RegulatorElectrical Characteristics (LM7805)Refer to the test circuits. -40°C < T J < 125°C, I O = 500mA, V I = 10V , C I = 0.1 µ F , unless otherwise specified.Notes:1.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.2.These parameters, although guaranteed, are not 100% tested in production.SymbolParameterConditionsMin.Typ.Max.UnitV OOutput VoltageT J = +25°C4.85.0 5.2V5mA ≤ I O ≤ 1A, P O ≤ 15W, V I = 7V to 20V4.755.0 5.25ReglineLine Regulation (1)T J = +25°C V O = 7V to 25V – 4.0100mV V I = 8V to 12V – 1.650.0Regload Load Regulation (1) T J = +25°C I O = 5mA to 1.5A –9.0100mV I O = 250mA to 750mA– 4.050.0I Q Quiescent CurrentT J = +25°C– 5.08.0mA ∆ I Q Quiescent Current Change I O = 5mA to 1A–0.030.5mA V I = 7V to 25V–0.3 1.3 ∆ V O / ∆ T Output Voltage Drift (2) I O = 5mA–-0.8–mV/°C V N Output Noise Voltage f = 10Hz to 100kHz, T A = +25°C –42.0– µ V/V O RR Ripple Rejection (2) f = 120Hz, V O = 8V to 18V 62.073.0–dB V DROP Dropout Voltage I O = 1A, T J = +25°C – 2.0–V r O Output Resistance (2) f = 1kHz–15.0–m Ω I SC Short Circuit Current V I = 35V , T A = +25°C –230–mA I PKPeak Current (2)T J= +25°C–2.2–ALM78XX/LM78XXA 3-Terminal 1A Positive Voltage RegulatorElectrical Characteristics (LM7806) (Continued)Refer to the test circuits. -40°C < T J < 125°C, I O = 500mA, V I = 11V , C I = 0.33 µ F , C O = 0.1 µ F , unless otherwise specified.Notes:3.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.4.These parameters, although guaranteed, are not 100% tested in production.SymbolParameterConditionsMinTyp.Max.UnitV OOutput VoltageT J = +25°C5.756.0 6.25V5mA ≤ I O ≤ 1A, P O ≤ 15W, V I = 8.0V to 21V5.76.0 6.3Regline Line Regulation (3) T J = +25°C V I = 8V to 25V – 5.0120mV V I = 9V to 13V – 1.560.0Regload Load Regulation (3) T J = +25°C I O = 5mA to 1.5A –9.0120mV I O = 250mA to 750mA– 3.060.0I Q Quiescent Current T J = +25°C– 5.08.0mA ∆ I Q Quiescent Current ChangeI O = 5mA to 1A ––0.5mA V I = 8V to 25V –– 1.3 ∆ V O / ∆ T Output Voltage Drift (4) I O = 5mA–-0.8–mV/°C V N Output Noise Voltage f = 10Hz to 100kHz, T A = +25°C –45.0– µ V/V O RR Ripple Rejection (4) f = 120Hz, V O= 8V to 18V 62.073.0–dB V DROP Dropout Voltage I O = 1A, T J = +25°C – 2.0–V r O Output Resistance (4) f = 1kHz–19.0–m ΩI SC Short Circuit Current V I = 35V , T A = +25°C –250–mA I PKPeak Current (4)T J = +25°C–2.2–A5.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.6.These parameters, although guaranteed, are not 100% tested in production.7.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.8.These parameters, although guaranteed, are not 100% tested in production.I PK Peak Current(10)T J = +25°C– 2.2–ANotes:9.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.10.These parameters, although guaranteed, are not 100% tested in production.11.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.12.These parameters, although guaranteed, are not 100% tested in production.13.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.14.These parameters, although guaranteed, are not 100% tested in production.15.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.16.These parameters, although guaranteed, are not 100% tested in production.17.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.18.These parameters, although guaranteed, are not 100% tested in production.r O Output Resistance(20) f = 1kHz–17.0–mΩI SC Short Circuit Current V I = 35V, T A = +25°C–250–mAI PK Peak Current(20)T J = +25°C– 2.2–ANotes:19.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.20.These parameters, although guaranteed, are not 100% tested in production.r O Output Resistance(22) f = 1kHz–17.0–mΩI SC Short Circuit Current V I = 35V, T A = +25°C–250–mAI PK Peak Current(22)T J = +25°C– 2.2–ANotes:21.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.22.These parameters, although guaranteed, are not 100% tested in production.V DROP Dropout Voltage I O = 1A, T J = +25°C– 2.0–V r O Output Resistance(24) f = 1kHz–18.0–mΩI SC Short Circuit Current V I = 35V, T A = +25°C–250–mAI PK Peak Current(24)T J = +25°C– 2.2–ANotes:23.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.24.These parameters, although guaranteed, are not 100% tested in production.Notes:25.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.26.These parameters, although guaranteed, are not 100% tested in production.RR Ripple Rejection (26) f = 120Hz, I O = 500mA, V I = 12V to 22V –62.0–dB V DROP Dropout Voltage I O = 1A, T J = +25°C – 2.0–V r O Output Resistance (26) f = 1kHz–17.0–m ΩI SC Short Circuit Current V I = 35V , T A = +25°C –250–mA I PKPeak Current (26)T J = +25°C–2.2–Ar O Output Resistance(28) f = 1kHz–17.0–mΩI SC Short Circuit Current V I = 35V, T A = +25°C–250–mAI PK Peak Current(28)T J = +25°C– 2.2–ANotes:27.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.28.These parameters, although guaranteed, are not 100% tested in production.V DROP Dropout Voltage I O = 1A, T J = +25°C– 2.0–V r O Output Resistance(30) f = 1kHz–18.0–mΩI SC Short Circuit Current V I = 35V, T A = +25°C–250–mAI PK Peak Current(30)T J = +25°C– 2.2–ANote:29.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.30.These parameters, although guaranteed, are not 100% tested in production.V DROP Dropout Voltage I O = 1A, T J = +25°C– 2.0–V r O Output Resistance(32) f = 1kHz–19.0–mΩI SC Short Circuit Current V I = 35V, T A = +25°C–250–mAI PK Peak Current(32)T J = +25°C– 2.2–ANotes:31.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.32.These parameters, although guaranteed, are not 100% tested in production.V DROP Dropout Voltage I O = 1A, T J = +25°C– 2.0–V r O Output Resistance(34) f = 1kHz–19.0–mΩI SC Short Circuit Current V I = 35V, T A = +25°C–250–mAI PK Peak Current(34)T J = +25°C– 2.2–ANotes:33.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.34.These parameters, although guaranteed, are not 100% tested in production.V DROP Dropout Voltage I O = 1A, T J = +25°C– 2.0–V r O Output Resistance(36) f = 1kHz–20.0–mΩI SC Short Circuit Current V I = 35V, T A = +25°C–250–mAI PK Peak Current(36)T J = +25°C– 2.2–ANotes:35.Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects mustbe taken into account separately. Pulse testing with low duty is used.36.These parameters, although guaranteed, are not 100% tested in production.LM78XX/LM78XXA 3-Terminal 1A Positive Voltage RegulatorLM78XX/LM78XXA 3-Terminal 1A Positive Voltage Regulator。

动车组电茶炉工作原理
开水炉电气主回路热水部分主要由漏电保护器、逆变器和感应线圈等部件组成，AC400V电源经断路器、漏电保护器进入主电控箱，由功率模块组成的半桥逆变器把直流电转变成25KHz左右的高频交流电，供给感应线圈，在产水箱腔体中产生涡流并使之发热将水烧开。

另取一相电压供给变压器得到17V 电源，经整流滤波供给LM7815，使LM7815输出DC15V电源给控制板使用；另取一相供给电磁阀和水泵还有制冷压缩机及冷凝器风扇。

进水电磁阀通电后，冷水经电控箱冷却管、水泵、进水电磁阀注入产水箱，当水位到达产水箱上水位时进水电磁阀关闭，停止进水并开始加热，水沸腾后从翻水膨胀筒上端跃出，进入储水箱，使产水箱水位下降，当降至产水箱的中水位时进水电磁阀打开补水，水位升至上水位时停止补水。

当储水箱内水位升至上水位时，电控箱停止工作，自动进入保温状态。

当取用开水使储水箱内水位降至下水位时，电控箱再次工作。

如此即可连续不断地供应开水。