稳压芯片选型
78L系列稳压芯片资料
1/24July 2003s OUTPUT CURRENT UP TO 100mAsOUTPUT VOLTAGES OF 3.3;5;6;8;9;10;12;15;18;20;24Vs THERMAL OVERLOAD PROTECTION s SHORT CIRCUIT PROTECTIONsNO EXTERNAL COMPONENTS ARE REQUIREDsAVAILABLE IN EITHER ±5%(AC)OR ±10%(C)SELECTIONDESCRIPTIONThe L78L00series of three-terminal positive regulators employ internal current limiting and thermal shutdown,making them essentially indestructible.If adequate heat-sink is provided,they can deliver up to 100mA output current.They are intended as fixed voltage regulators in a wide range of applications including local or on-card regulation for elimination of noise and distribution problems associated with single-point regulation.In addition,they can be used with power pass elements to make high-current voltage regulators.The L78L00series used as Zener diode/resistor combination replacement,offers an effective output impedance improvement of typically twoorders of magnitude,along with lower quiescent current and lower noise.L78L00SERIESPOSITIVE VOLTAGEREGULATORSL78L00SERIES2/24ABSOLUTE MAXIMUM RATINGS(*)Our SO-8package used for Voltage Regulators is modified internally to have pins 2,3,6and 7electrically communed to the die attach flag.This particular frame decreases the total thermal resistance of the package and increasesits ability to dissipate power when an appro-priate area of copper on the printed circuit board is available for heat-sinking.The external dimensions are the same as for the standard SO-8.THERMAL DATA(*)Considering 6cm of copper Board heat-sinkTEST CIRCUITSCONNECTION DIAGRAM (top view)SymbolParameter²Value UnitV I DC Input VoltageV O =3.3to 9V 30V V O =12to 15V 35V O =18to 24V40I O Output Current 100mA P tot Power DissipationInternally Limited (*)T stg Storage Temperature Range-40to 150°C T opOperating Junction Temperature Range for L78L00C,L78L00AC 0to 125°C for L78L00AB-40to 125Symbol ParameterSO-8TO-92SOT-89Unit R thj-case Thermal Resistance Junction-case Max 2015°C/W R thj-ambThermal Resistance Junction-ambientMax55(*)200°C/WL78L00SERIES ORDERING CODESTYPE SO-8(TUBE)*TO-92(TUBE)**SOT-89(T&R)OUTPUT VOLTAGE L78L33C L78L33CD L78L33CZ 3.3VL78L33AC L78L33ACD L78L33ACZ L78L33ACUTR 3.3VL78L33AB L78L33ABD L78L33ABZ L78L33ABUTR 3.3VL78L05C L78L05CD L78L05CZ5VL78L05AC L78L05ACD L78L05ACZ L78L05ACUTR5VL78L05AB L78L05ABD L78L05ABZ L78L05ABUTR5VL78L06C L78L06CD L78L06CZ6VL78L06AC L78L06ACD L78L06ACZ L78L06ACUTR6VL78L06AB L78L06ABD L78L06ABZ L78L06ABUTR6VL78L08C L78L08CD L78L08CZ8VL78L08AC L78L08ACD L78L08ACZ L78L08ACUTR8VL78L08AB L78L08ABD L78L08ABZ L78L08ABUTR8VL78L09C L78L09CD L78L09CZ9VL78L09AC L78L09ACD L78L09ACZ L78L09ACUTR9VL78L09AB L78L09ABD L78L09ABZ L78L09ABUTR9VL78L10C L78L10CD L78L10CZ10VL78L10AC L78L10ACD L78L10ACZ L78L10ACUTR10VL78L10AB L78L10ABD L78L10ABZ L78L10ABUTR10VL78L12C L78L12CD L78L12CZ12VL78L12AC L78L12ACD L78L12ACZ L78L12ACUTR12VL78L12AB L78L12ABD L78L12ABZ L78L12ABUTR12VL78L15C L78L15CD L78L15CZ15VL78L15AC L78L15ACD L78L15ACZ L78L15ACUTR15VL78L15AB L78L15ABD L78L15ABZ L78L15ABUTR15VL78L18C L78L18CD L78L18CZ18VL78L18AC L78L18ACD L78L18ACZ L78L18ACUTR18VL78L18AB L78L18ABD L78L18ABZ L78L18ABUTR18VL78L20C L78L20CD L78L20CZ20VL78L20AC L78L20ACD L78L20ACZ L78L20ACUTR20VL78L20AB L78L20ABD L78L20ABZ L78L20ABUTR20VL78L24C L78L24CD L78L24CZ24VL78L24AC L78L24ACD L78L24ACZ L78L24ACUTR24VL78L24AB L78L24ABD L78L24ABZ L78L24ABUTR24V(*)Available in Tape&Reel with the suffix"13TR".(**)Available in Ammopak with the suffix"-AP"or in Tape&Reel with the suffix"TR".3/24L78L00SERIES4/24ELECTRICAL CHARACTERISTICS OF L78L33C (refer to the test circuits,T J =0to 125°C,V I =8.3V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified)ELECTRICAL CHARACTERISTICS OF L78L05C (refer to the test circuits,T J =0to 125°C,V I =10V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 3.036 3.33.564V V O Output Voltage I O =1to 40mA V I =5.3to 20V 2.97 3.63VI O =1to 70mA V I =8.3V2.973.63∆V O Line Regulation V I =5.3to 20V T J =25°C 150mV V I =6.3to 20V T J =25°C 100∆V O Load Regulation I O =1to 100mA T J =25°C 60mV I O =1to 40mA T J =25°C30I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =6.3to 20V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C40µV SVR Supply Voltage Rejection V I =6.3to 16.3V f =120Hz I O =40mAT J =25°C4149dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 4.655.4V V O Output Voltage I O =1to 40mA V I =7to 20V 4.5 5.5VI O =1to 70mA V I =10V4.55.5∆V O Line Regulation V I =8.5to 20V T J =25°C 200mV V I =9to 20V T J =25°C 150∆V O Load Regulation I O =1to 100mA T J =25°C 60mV I O =1to 40mA T J =25°C30I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =8to 20V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C40µV SVR Supply Voltage Rejection V I =9to 20V f =120Hz I O =40mAT J =25°C4049dB V dDropout Voltage1.7VL78L00SERIES5/24ELECTRICAL CHARACTERISTICS OF L78L06C (refer to the test circuits,T J =0to 125°C,V I =12V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).ELECTRICAL CHARACTERISTICS OF L78L08C (refer to the test circuits,T J =0to 125°C,V I =14V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 5.5266.48V V O Output Voltage I O =1to 40mA V I =8.5to 20V 5.4 6.6VI O =1to 70mA V I =12V5.46.6∆V O Line Regulation V I =8.5to 20V T J =25°C 200mV V I =9to 20V T J =25°C 150∆V O Load Regulation I O =1to 100mA T J =25°C 60mV I O =1to 40mA T J =25°C30I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =8to 20V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C50µV SVR Supply Voltage Rejection V I =9to 20V f =120Hz I O =40mAT J =25°C3846dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 7.3688.64V V O Output Voltage I O =1to 40mA V I =10.5to 23V 7.28.8VI O =1to 70mA V I =14V7.28.8∆V O Line Regulation V I =10.5to 23V T J =25°C 200mV V I =11to 23V T J =25°C 150∆V O Load Regulation I O =1to 100mA T J =25°C 80mV I O =1to 40mA T J =25°C40I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =11to 23V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C60µV SVR Supply Voltage Rejection V I =12to 23V f =120Hz I O =40mAT J =25°C3645dB V dDropout Voltage1.7VL78L00SERIES6/24ELECTRICAL CHARACTERISTICS OF L78L09C (refer to the test circuits,T J =0to 125°C,V I =15V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).ELECTRICAL CHARACTERISTICS OF L78L10C (refer to the test circuits,T J =0to 125°C,V I =16V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 8.2899.72V V O Output Voltage I O =1to 40mA V I =11.5to 23V 8.19.9VI O =1to 70mA V I =15V8.19.9∆V O Line Regulation V I =11.5to 23V T J =25°C 250mV V I =12to 23V T J =25°C 200∆V O Load Regulation I O =1to 100mA T J =25°C 80mV I O =1to 40mA T J =25°C40I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =12to 23V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C70µV SVR Supply Voltage Rejection V I =12to 23V f =120Hz I O =40mAT J =25°C3644dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 9.21010.8V V O Output Voltage I O =1to 40mA V I =12.5to 23V 911VI O =1to 70mA V I =16V911∆V O Line Regulation V I =12.5to 23V T J =25°C 230mV V I =13to 23V T J =25°C 170∆V O Load Regulation I O =1to 100mA T J =25°C 80mV I O =1to 40mA T J =25°C40I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =13to 23V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C60µV SVR Supply Voltage Rejection V I =14to 23V f =120Hz I O =40mAT J =25°C3745dB V dDropout Voltage1.7VL78L00SERIES7/24ELECTRICAL CHARACTERISTICS OF L78L12C (refer to the test circuits,T J =0to 125°C,V I =19V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).ELECTRICAL CHARACTERISTICS OF L78L15C (refer to the test circuits,T J =0to 125°C,V I =23V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 11.11212.9V V O Output Voltage I O =1to 40mA V I =14.5to 27V 10.813.2VI O =1to 70mA V I =19V10.813.2∆V O Line Regulation V I =14.5to 27V T J =25°C 250mV V I =16to 27V T J =25°C 200∆V O Load Regulation I O =1to 100mA T J =25°C 100mV I O =1to 40mA T J =25°C50I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =16to 27V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C80µV SVR Supply Voltage Rejection V I =15to 25V f =120Hz I O =40mAT J =25°C3642dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 13.81516.2V V O Output Voltage I O =1to 40mA V I =17.5to 30V 13.516.5VI O =1to 70mA V I =23V13.516.5∆V O Line Regulation V I =17.5to 30V T J =25°C 300mV V I =20to 30V T J =25°C 250∆V O Load Regulation I O =1to 100mA T J =25°C 150mV I O =1to 40mA T J =25°C75I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =20to 30V 1.5eN Output Noise Voltage B =10Hz to 100KHzT J =25°C90µV SVR Supply Voltage Rejection V I =18.5to 28.5V f =120Hz I O =40mA T J =25°C3339dB V dDropout Voltage1.7VL78L00SERIES8/24ELECTRICAL CHARACTERISTICS OF L78L18C (refer to the test circuits,T J =0to 125°C,V I =27V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).ELECTRICAL CHARACTERISTICS OF L78L20C (refer to the test circuits,T J =0to 125°C,V I =29V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified)Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 16.61819.4V V O Output Voltage I O =1to 40mA V I =22to 33V 16.219.8VI O =1to 70mA V I =27V16.219.8∆V O Line Regulation V I =22to 33V T J =25°C 320mV V I =22to 33V T J =25°C 270∆V O Load Regulation I O =1to 100mA T J =25°C 170mV I O =1to 40mA T J =25°C85I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =23to 33V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C120µV SVR Supply Voltage Rejection V I =23to 33V f =120Hz I O =40mAT J =25°C3238dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 18.42021.6V V O Output Voltage I O =1to 40mA V I =24to 33V 1822VI O =1to 70mA V I =29V1822∆V O Line Regulation V I =22.5to 34V T J =25°C 330mV V I =24to 34V T J =25°C 280∆V O Load Regulation I O =1to 100mA T J =25°C 180mV I O =1to 40mA T J =25°C90I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =25to 33V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C120µV SVR Supply Voltage Rejection V I =25to 35V f =120Hz I O =40mAT J =25°C3138dB V dDropout Voltage1.7VL78L00SERIES9/24ELECTRICAL CHARACTERISTICS OF L78L24C (refer to the test circuits,T J =0to 125°C,V I =33V,I O =40mA,C I =0.33µF,C O =0.1µF unless otherwise specified).ELECTRICAL CHARACTERISTICS OF L78L33AB AND L78L33AC(refer to the test circuits,V I =8.3V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L33AC,T J =-40to 125°C for L78L33AB,unless otherwise specified)Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 22.12425.9V V O Output Voltage I O =1to 40mA V I =27to 38V 21.626.4VI O =1to 70mA V I =33V21.626.4∆V O Line Regulation V I =27to 38V T J =25°C 350mV V I =28to 38V T J =25°C 300∆V O Load Regulation I O =1to 100mA T J =25°C 200mV I O =1to 40mA T J =25°C100I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.2mA V I =28to 38V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C200µV SVR Supply Voltage Rejection V I =29to 35V f =120Hz I O =40mAT J =25°C3037dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 3.168 3.33.432V V O Output Voltage I O =1to 40mA V I =5.3to 20V 3.135 3.465VI O =1to 70mA V I =8.3V3.1353.465∆V O Line Regulation V I =5.3to 20V T J =25°C 150mV V I =6.3to 20V T J =25°C 100∆V O Load Regulation I O =1to 100mA T J =25°C 60mV I O =1to 40mA T J =25°C30I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =6.3to 20V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C40µV SVR Supply Voltage Rejection V I =6.3to 16.3V f =120Hz I O =40mAT J =25°C4149dB V dDropout Voltage1.7VL78L00SERIES10/24ELECTRICAL CHARACTERISTICS OF L78L05AB AND L78L05AC (refer to the test circuits,V I =10V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L05AC,T J =-40to 125°C for L78L05AB,unless otherwise specified)ELECTRICAL CHARACTERISTICS OF L78L06AB AND L78L06AC (refer to the test circuits,V I =12V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L06AC,T J =-40to 125°C for L78L06AB,unless otherwise specified)Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 4.855.2V V O Output Voltage I O =1to 40mA V I =7to 20V 4.75 5.25VI O =1to 70mA V I =10V4.755.25∆V O Line Regulation V I =7to 20V T J =25°C 150mV V I =8to 20V T J =25°C 100∆V O Load Regulation I O =1to 100mA T J =25°C 60mV I O =1to 40mA T J =25°C30I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =8to 20V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C40µV SVR Supply Voltage Rejection V I =8to 18V f =120Hz I O =40mAT J =25°C4149dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 5.7666.24V V O Output Voltage I O =1to 40mA V I =8.5to 20V 5.7 6.3VI O =1to 70mA V I =12V5.76.3∆V O Line Regulation V I =8.5to 20V T J =25°C 150mV V I =9to 20V T J =25°C 100∆V O Load Regulation I O =1to 100mA T J =25°C 60mV I O =1to 40mA T J =25°C30I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =9to 20V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C50µV SVR Supply Voltage Rejection V I =9to 20V f =120Hz I O =40mAT J =25°C3946dB V dDropout Voltage1.7V11/24ELECTRICAL CHARACTERISTICS OF L78L08AB AND L78L08AC (refer to the test circuits,V I =14V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L08AC,T J =-40to 125°C for L78L08AB,unless otherwise specified)ELECTRICAL CHARACTERISTICS OF L78L09AB AND L78L09AC (refer to the test circuits,V I =15V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L09AC,T J =-40to 125°C for L78L09AB,unless otherwise specified)Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 7.6888.32V V O Output Voltage I O =1to 40mA V I =10.5to 23V 7.68.4VI O =1to 70mA V I =14V7.68.4∆V O Line Regulation V I =10.5to 23V T J =25°C 175mV V I =11to 23V T J =25°C 125∆V O Load Regulation I O =1to 100mA T J =25°C 80mV I O =1to 40mA T J =25°C40I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =11to 23V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C60µV SVR Supply Voltage Rejection V I =12to 23V f =120Hz I O =40mAT J =25°C3745dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 8.6499.36V V O Output Voltage I O =1to 40mA V I =11.5to 23V 8.559.45VI O =1to 70mA V I =15V8.559.45∆V O Line Regulation V I =11.5to 23V T J =25°C 225mV V I =12to 23V T J =25°C 150∆V O Load Regulation I O =1to 100mA T J =25°C 80mV I O =1to 40mA T J =25°C40I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =12to 23V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C70µV SVR Supply Voltage Rejection V I =12to 23V f =120Hz I O =40mAT J =25°C3744dB V dDropout Voltage1.7V12/24ELECTRICAL CHARACTERISTICS OF L78L10AB AND L78L10AC (refer to the test circuits,V I =16V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L10AC,T J =-40to 125°C for L78L10AB,unless otherwise specified)ELECTRICAL CHARACTERISTICS OF L78L12AB AND L78L12AC (refer to the test circuits,V I =19V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L12AC,T J =-40to 125°C for L78L12AB,unless otherwise specified)Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 9.61010.4V V O Output Voltage I O =1to 40mA V I =12.5to 23V 9.510.5VI O =1to 70mA V I =16V9.510.5∆V O Line Regulation V I =12.5to 23V T J =25°C 230mV V I =13to 23V T J =25°C 170∆V O Load Regulation I O =1to 100mA T J =25°C 80mV I O =1to 40mA T J =25°C40I d Quiescent Current T J =25°C 6mA T J =125°C 5.5mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =13to 23V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C60µV SVR Supply Voltage Rejection V I =14to 23V f =120Hz I O =40mAT J =25°C3745dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 11.51212.5V V O Output Voltage I O =1to 40mA V I =14.5to 27V 11.412.6VI O =1to 70mA V I =19V11.412.6∆V O Line Regulation V I =14.5to 27V T J =25°C 250mV V I =16to 27V T J =25°C 200∆V O Load Regulation I O =1to 100mA T J =25°C 100mV I O =1to 40mA T J =25°C50I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =16to 27V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C80µV SVR Supply Voltage Rejection V I =15to 25V f =120Hz I O =40mAT J =25°C3742dB V dDropout Voltage1.7V13/24ELECTRICAL CHARACTERISTICS OF L78L15AB AND L78L15AC (refer to the test circuits,V I =19V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L15AC,T J =-40to 125°C for L78L15AB,unless otherwise specified)ELECTRICAL CHARACTERISTICS OF L78L18AB AND L78L18AC(refer to the test circuits,V I =27V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L18AC,T J =-40to 125°C for L78L18AB,unless otherwise specified)Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 14.41515.6V V O Output Voltage I O =1to 40mA V I =17.5to 30V 14.2515.75VI O =1to 70mA V I =23V14.2515.75∆V O Line Regulation V I =17.5to 30V T J =25°C 300mV V I =20to 30V T J =25°C 250∆V O Load Regulation I O =1to 100mA T J =25°C 150mV I O =1to 40mA T J =25°C75I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =20to 30V 1.5eN Output Noise Voltage B =10Hz to 100KHzT J =25°C90µV SVR Supply Voltage Rejection V I =18.5to 28.5V f =120Hz I O =40mA T J =25°C3439dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 17.31818.7V V O Output Voltage I O =1to 40mA V I =22to 33V 17.118.9VI O =1to 70mA V I =27V17.118.9∆V O Line Regulation V I =22to 33V T J =25°C 320mV V I =22to 33V T J =25°C 270∆V O Load Regulation I O =1to 100mA T J =25°C 170mV I O =1to 40mA T J =25°C85I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =23to 33V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C120µV SVR Supply Voltage Rejection V I =23to 33V f =120Hz I O =40mAT J =25°C3338dB V dDropout Voltage1.7V14/24ELECTRICAL CHARACTERISTICS OF L78L20AB AND L78L20AC (refer to the test circuits,V I =29V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L20AC,T J =-40to 125°C for L78L20AB,unless otherwise specified)ELECTRICAL CHARACTERISTICS OF L78L24AB AND L78L24AC (refer to the test circuits,V I =27V,I O =40mA,C I =0.33µF,C O =0.1µF,T J =0to 125°C for L78L24AC,T J =-40to 125°C for L78L24AB,unless otherwise specified)Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 19.22020.8V V O Output Voltage I O =1to 40mA V I =24to 33V 1921VI O =1to 70mA V I =29V1921∆V O Line Regulation V I =22.5to 34V T J =25°C 330mV V I =24to 34V T J =25°C 280∆V O Load Regulation I O =1to 100mA T J =25°C 180mV I O =1to 40mA T J =25°C90I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =25to 33V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C120µV SVR Supply Voltage Rejection V I =25to 35V f =120Hz I O =40mAT J =25°C3238dB V dDropout Voltage1.7V Symbol ParameterTest ConditionsMin.Typ.Max.Unit V O Output Voltage T J =25°C 232425V V O Output Voltage I O =1to 40mA V I =27to 38V 22.825.2VI O =1to 70mA V I =33V22.825.2∆V O Line Regulation V I =27to 38V T J =25°C 350mV V I =28to 38V T J =25°C 300∆V O Load Regulation I O =1to 100mA T J =25°C 200mV I O =1to 40mA T J =25°C100I d Quiescent Current T J =25°C 6.5mA T J =125°C 6mA ∆I d Quiescent Current Change I O =1to 40mA 0.1mA V I =28to 38V 1.5eN Output Noise Voltage B =10Hz to 100KHz T J =25°C200µV SVR Supply Voltage Rejection V I =23to 33V f =120Hz I O =40mAT J =25°C3137dB V dDropout Voltage1.7VFigure1:L78L05/12Output Voltage vs Ambient TemperatureFigure2:L78L05/12/24Load Characteristics Figure3:L78L05/12/24Thermal Shutdown Figure4:L78L05/12Quiescent Current vs Output CurrentFigure5:L78L05Quiescent Current vs Input VoltageFigure6:L78L05/12/24OutputCharacteristics15/24Figure7:L78L05/12/24Ripple Rejection Figure8:L78L05Dropout Characteristics Figure9:L78L00Series Short Circuit OutputCurrent16/2417/24TYPICAL APPLICATIONSTable 10:High Output Current Short Circuit ProtectedFigure 11:Edit Boost CircuitFigure 12:CurrentRegulatorFigure13:Adjustable OutputRegulator18/24Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.© The ST logo is a registered trademark of STMicroelectronics© 2003 STMicroelectronics - Printed in Italy - All Rights ReservedSTMicroelectronics GROUP OF COMPANIESAustralia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States.© 24/24。
电源芯片选型
①明确输入电压（或范围）和输出电压，根据输入输出的大小关系决定选择降压、升压或升降压芯片。
如果是降压，则可以选择线性稳压器、电容式DC-DC（即电荷泵）或降压DC-DC（当然升/降压DC-DC也可以，考虑到性价比没有必要这样选）；如果是升压或者升/降压，则只能选择DC-DC转换器（电容式或者电感式升压DC-DC）！②如果是降压，考虑效率，需要计算输入与输出之间的压差。
若这个压差很小（远远小于1 V），则可以考虑选择低压差线性稳压器（LDO）；若这个压差在1 V以上，则可以考虑选择普通线性稳压器或者电感式降压DC-DC。
如果对效率没有要求，两种线性稳压器都可以的情况下，追求更低成本则可以选用普通线性稳压器。
③在线性稳压器和DC-DC稳压器都可以的情况下，若把转换效率放在第一位，则可以选择DC-DC稳压器；若对价格限制得很严格，并且要求较小的纹波和噪声，则可以考虑选用线性稳压器。
④在使用电池供电时，若要求较长的电池使用时间，需要优先考虑效率，无论是升压、降压、升/降压都可以选用DC-DC转换器。
为获得较高的效率，此时需要参照DC-DC转换器芯片手册里边的效率随负载电流变化曲线，要根据负载电流选择合适的DC-DC转换器，确保稳压器达到较高的效率。
⑤为保证电池供电系统电源负荷变化较大应用的效率，最好选择PFM/PWM自动切换控制式的DC-DC变换器。
PWM的特点是噪音低、满负载时效率高且能工作在连续导电模式，PFM具有静态功耗小，在低负荷时可改进稳压器的效率。
当系统在重负荷时由PWM控制，在低负荷时自动切换到PFM控制，这样能够兼顾轻重负载的效率。
在备有待机模式的系统中，采用PFM/PWM切换控制的DC-DC稳压器能够得到较高效率。
这样的电源芯片有TPS62110/62111/62112/62113、MAX1705/1706、NCP1523/1530/1550等。
⑥不要“大牛拉小车”或“小牛拉大车”。
选用电源芯片时为保证电源的使用寿命，需要留有一定的裕量，较合适的工作电流为电源芯片最大输出电流的70%～90%。
电源芯片选型
①明确输入电压（或范围）和输出电压，根据输入输出的大小关系决定选择降压、升压或升降压芯片。
如果是降压，则可以选择线性稳压器、电容式DC-DC（即电荷泵）或降压DC-DC（当然升/降压DC-DC也可以，考虑到性价比没有必要这样选）；如果是升压或者升/降压，则只能选择DC-DC转换器（电容式或者电感式升压 D C - D C ）！②如果是降压，考虑效率，需要计算输入与输出之间的压差。
若这个压差很小（远远小于IV），则可以考虑选择低压差线性稳压器（LDO）;若这个压差在1V以上，则可以考虑选择普通线性稳压器或者电感式降压DC-DC。
如果对效率没有要求，两种线性稳压器都可以的情况下，追求更低成本则可以选用普通线性稳压器。
③在线性稳压器和DC-DC 稳压器都可以的情况下，若把转换效率放在第一位，则可以选择DC-DC 稳压器；若对价格限制得很严格，并且要求较小的纹波和噪声，则可以考虑选用线性稳压器④在使用电池供电时，若要求较长的电池使用时间，需要优先考虑效率，无论是升压、降压、升/降压都可以选用DC-DC 转换器。
为获得较高的效率，此时需要参照DC-DC 转换器芯片手册里边的效率随负载电流变化曲线，要根据负载电流选择合适的DC-DC 转换器，确保稳压器达到较高的效率⑤为保证电池供电系统电源负荷变化较大应用的效率，最好选择PFM/PWM自动切换控制式的DC-DC变换器。
PWM的特点是噪音低、满负载时效率高且能工作在连续导电模式，PFM具有静态功耗小，在低负荷时可改进稳压器的效率。
当系统在重负荷时由PWM控制，在低负荷时自动切换到PFM控制，这样能够兼顾轻重负载的效率。
在备有待机模式的系统中，采用PFM/PWM切换控制的DC-DC 稳压器能够得到较高效率。
这样的电源芯片有TPS62110/62111/62112/62113 、M A X 1 7 0 5 / 1 7 0 6 、NC P 1 5 2 3 / 1 5 3 0 / 1 5 5 0 等⑥不要大牛拉小车”或小牛拉大车”选用电源芯片时为保证电源的使用寿命,需要留有一定的裕量，较合适的工作电流为电源芯片最大输出电流的70%〜90%。
LDO稳压芯片重要测试参数
1 LDO选型关键指标及定义1.1 输入电压范围LDO的输入电压范围决定了最低的可用输入电源电压。
指标可能提供宽的输入电压范围，最小的输入电压VIN必须大于VOUT+VDO。
需要注意，这与器件Datasheet中所给出的输入电压最小值无关。
1.2压差压差指保持电压稳定所需的输入电压和输出电压之间的最小差值。
也就是说，LDO能够在输入电压降低时保持输出负载电压不变，直到输入电压接近输出电压加上压差，在这个点输出电压将“失去”稳定。
压差应尽可能小，以使功耗最小，效率最高。
当输出电压降低到低于标称值 100mV的电压时，通常被认为达到了这个压差。
负载电流和结点温度会影响这个压差。
最大压差值应在整个工作温度范围和负载电流条件下加以规定。
1.3效率在忽略LDO静态电流的情况下，可以采用VOUT/VIN 式子来计算效率。
1.4功耗可以根据公式PD = (VIN - VOUT) * IOUT 计算。
这里PD 与器件封装类型、环境温度（TA）和器件最大结温（TJMAX）密切相关。
如果功率耗散较高，同时又苛求较高的效率，那么应优先考虑选择降压型DC/DC 稳压器。
1.5反向泄漏保护在某些LDO的输出端上的电压高于输入端的电压的特殊应用中，反向泄漏保护可以有效防止电流从LDO的输出端流向输入端。
如果忽视这点,这种反向泄漏会损坏输入电源，特别是当输入电源为电池的时候，尤其需要重视。
1.6接地（静态）电流静态电流Iq就是输入电流Iin和负载电流IOUT之间的差值，在规定的负载电流条件下测量。
对于固定电压稳压器，Iq等于接地电流Ig。
对于可调稳压器，静态电流等于接地电流减去来自外部分压电阻网络中的电流。
1.7关断电流关断电流指设备禁用时LDO消耗的输入电流，对便携LDO来说通常低于1.0 µA。
这个指标对于便携设备关机时长待机期间的电池寿命来说很重要。
1.8输出电压精度ADI公司的LDO具有很高的输出电压精度，在工厂制造时就被精确调整到±1%之内（25℃）。
电路芯片选型方法
电路芯片选型方法
电路芯片选型是电子产品设计过程中的重要环节，它直接影响到产品的性能、成本和可靠性。
以下是一些常用的电路芯片选型方法：
1. 根据产品需求确定芯片类型：根据产品的功能、性能指标和工作环境要求，选择合适的芯片类型。
2. 考虑芯片的功耗和电源电压：根据产品的功耗需求和电源电压范围，选择功耗低、电源电压适用范围广的芯片。
3. 考虑芯片的工作温度范围：根据产品的工作温度范围，选择工作温度范围广、稳定性好的芯片。
4. 考虑芯片的封装形式和尺寸：根据产品的尺寸要求和PCB布局，选择封装形式合适、尺寸小的芯片。
5. 考虑芯片的价格和供货情况：根据产品的成本预算和生产周期，选择价格合理、供货稳定的芯片。
6. 参考同类产品的设计经验和技术资料：通过查阅相关资料和技术手册，了解同类产品所采用的芯片型号和性能参数，作为选型的参考依据。
常用电源芯片及其参数（精）
常用电源芯片及其参数（精）常用电源的电源稳压器件如下: 79L05负5V稳压器79L06负6V稳压器79L08负8V稳压器79L09负9V稳压器79L12负12V稳压器79L15负15V稳压器79L18负18V稳压器79L24负24V稳压器LM1575T-3.33.3V简易开关电源稳压器(1ALM1575T-5.05V简易开关电源稳压器(1ALM1575T-1212V简易开关电源稳压器(1ALM1575T-1515V简易开关电源稳压器(1A LM1575T-ADJ 简易开关电源稳压器(1A可调1.23 to 37LM1575HVT-3.33.3V简易开关电源稳压器(1ALM1575HVT-5.0LM1575HVT-1212V简易开关电源稳压器(1ALM1575HVT-1515V简易开关电源稳压器(1ALM1575HVT-ADJ简易开关电源稳压器(1A可调1.23 to 37LM2575T-3.33.3V简易开关电源稳压器(1ALM2575T-5.05V简易开关电源稳压器(1ALM2575T-1212V简易开关电源稳压器(1ALM2575T-1515V简易开关电源稳压器(1ALM2575T-ADJ简易开关电源稳压器(1A可调1.23 to 37 LM2575HVT-3.3 3.3V简易开关电源稳压器(1ALM2575HVT-5.05V简易开关电源稳压器(1ALM2575HVT-1212V简易开关电源稳压器(1ALM2575HVT-1515V简易开关电源稳压器(1ALM2575HVT-ADJ简易开关电源稳压器(1A可调1.23 to 37 LM2576T-3.3 3.3V简易开关电源稳压器(3ALM2576T-5.05.0V简易开关电源稳压器(3ALM2576T-12LM2576T-1515V简易开关电源稳压器(3ALM2576T-ADJ简易开关电源稳压器(3A可调1.23V to 37V LM2576HVT-3.3 3.3V简易开关电源稳压器(3ALM2576HVT-5.05.0V简易开关电源稳压器(3ALM2576HVT-1212V简易开关电源稳压器(3ALM2576HVT-1515V简易开关电源稳压器(3ALM2576HVT-ADJ简易开关电源稳压器(3A可调1.23V to 37VLM2930T-5.05.0V低压差稳压器LM2930T-8.08.0V低压差稳压器LM2931AZ-5.05.0V低压差稳压器(TO-92LM2931T-5.05.0V低压差稳压器LM2931CT3V to 29V低压差稳压器(TO-220,5PIN LM2940CT-5.05.0V低压差稳压器LM2940CT-8.08.0V低压差稳压器LM2940CT-9.09.0V低压差稳压器LM2940CT-1010V低压差稳压器LM2940CT-1212V低压差稳压器LM2940CT-1515V低压差稳压器LM123K5V稳压器(3ALM323K5V稳压器(3ALM117K1.2V to 37V三端正可调稳压器(1.5A LM317LZ 1.2V to 37V三端正可调稳压器(0.1A LM317T 1.2V to 37V三端正可调稳压器(1.5A LM317K 1.2V to 37V三端正可调稳压器(1.5A LM133K 三端可调-1.2V to -37V稳压器(3.0A LM333K 三端可调-1.2V to -37V稳压器(3.0ALM337K三端可调-1.2V to -37V稳压器(1.5ALM337T三端可调-1.2V to -37V稳压器(1.5ALM337LZ三端可调-1.2V to -37V稳压器(0.1ALM150K三端可调1.2V to 32V稳压器(3ALM350K三端可调1.2V to 32V稳压器(3ALM350T三端可调1.2V to 32V稳压器(3ALM138K三端正可调1.2V to 32V稳压器(5ALM338T三端正可调1.2V to 32V稳压器(5ALM338K 三端正可调 1.2V to 32V 稳压器(5A LM336-2.5 2.5V 精密基准电压源LM336-5.0 5.0V 精密基准电压源LM385-1.2 1.2V 精密基准电压源 LM385-2.5 2.5V 精密基准电压源 LM399H 6.9999V 精密基准电压源 LM431ACZ 精密可调 2.5V to 36V 基准稳压源 LM723 高精度可调 2V to 37V 稳压器 LM105 高精度可调 4.5V to 40V 稳压器LM305 高精度可调4.5V to 40V 稳压器MC1403 2.5V 基准电压源MC34063 充电控制器 SG3524 脉宽调制开关电源控制器TL431 精密可调 2.5V to 36V 基准稳压源 TL494 脉宽调制开关电源控制器TL497 频率调制开关电源控制器TL7705 电池供电/欠压控制器7805 正 5V 稳压器(1A 7806 正 6V 稳压器(1A 7808 正 8V 稳压器(1A 7809 正 9V 稳压议（1A） 7812 正 12V 稳压器(1A 7815 正 15V 稳压器(1A 7818 正 18V 稳压器(1A 7824 正 24V 稳压器(1A 7905 负 5V 稳压器(1A7906 负 6V 稳压器(1A 7908 负 8V 稳压器(1A 7909 负 9V 稳压器（1A） 7912 负 12V 稳压器(1A 7915 负 15V 稳压器(1A 7918 负18V 稳压器(1A 7924 负 24V 稳压器(1A 78L05 正 5V 稳压器 78L06 正 6V 稳压器 78L08 正 8V 稳压器 78L09 正 9V 稳压器 78L12 正 12V 稳压器 78L15 正 15V 稳压器 78L18正 18V 稳压器 78L24 正 24V 稳压器。
7805系列封装区别和选型区别
7805 系列封装区别和选型区别
这类稳压器的输出为固定电压。
国内外各生产厂家均将此系列稳压器命名为78x x 系列，如7805、7812 等。
其中„78‟后面的数字代表
该稳压器输出的正电压数值，以伏特为单位。
例如7805 即表示稳压输出为
5V。
7812 表示稳压输出12V 等。
有时我们会发现型号78xx 前面和后面还有一个或几个英文字母，如：
W78xx、AN78xx、L78xxCV 等。
前面的字母称前缀，一般是各生产厂(公司)
的代号，后面的字母称后缀，用以表示输出电压容差和封装外壳的类型等。
不过，各生厂家对集成稳压器型号后缀所用字母定义不一，但这对实际使用没多大的影响。
78xx 系列稳压器按输出电压分，共有9 种。
分别为：7805、7806、7809、7810、7812、7815、7818、7824。
按其最大输出电流又可分为：78L x x、
78Mxx 和78xx 三个分系列。
78Lxx 系列最大输出电流为100mA;78M x x 系
列最大输出电流为500mA;78xx 系列最大输出电流为1.5A。
78xx 系列稳压器外形见图。
其中，78Lxx 系列有两种封装形式。
一种是金
属壳的TO-39 封装，见图(a);一种是塑料TO-92 封装，见图(b)。
前者温度特
性比后者好，最大功耗为700mW，加散热片时最大功耗可达1.4W。
后者功
耗为700mW，使用时无需加散热片。
78Lxx 系列中，一般以塑封的使用较。
开关型稳压芯片LM2576中文资料
开关型稳压芯片LM2576中文资料编辑： 文章来源：网络我们无意侵犯您的权益,如有侵犯请[联系我们]开关型稳压芯片LM2576中文资料LM2576系列开关稳压集成电路是线性三端稳压器件(如78xx系列端稳压集成电路)的替代品，它具有可靠的工作性能、较高的工作效率和较强的输出电流驱动能力，从而为MCU的稳定、可靠工作提供了强有力的保证。
1 LM2576简介LM2576系列是美国国家半导体公司生产的3A电流输出降压开关型集成稳压电路，它内含固定频率振荡器(52kHz)和基准稳压器(1.23V)，并具有完善的保护电路，包括电流限制及热关断电路等，利用该器件只需极少的外围器件便可构成高效稳压电路。
LM2576系列包括LM2576(最高输入电压40V)及LM2576HV(最高输入电压60V)二个系列。
各系列产品均提供有3.3V(-3.3)、5V(-5.0)、12V(-12)、15V(-15)及可调(-ADJ)等多个电压档次产品。
此外，该芯片还提供了工作状态的外部控制引脚。
LM2576系列开关稳压集成电路的主要特性如下[2]：●最大输出电流：3A;●最高输入电压：LM2576为40V，LM2576HV为60V;●输出电压：3.3V、5V、12V、15V和ADJ(可调)等可选;●振东频率：52kHz;●转换效率：75%～88%(不同电压输出时的效率不同);●控制方式：PWM;●工作温度范围：-40℃～+125℃●工作模式：低功耗/正常两种模式可外部控制;●工作模式控制：TTL电平兼容;●所需外部元件：仅四个(不可调)或六个(可调);●器件保护：热关断及电流限制;●封装形式：TO-220或TO-263。
LM2576的内部框图如图1所示，该框图的引脚定义对应于五脚TO-220封装形式。
LM2576内部包含52kHz振荡器、1.23V基准稳压电路、热关断电路、电流限制电路、放大器、比较器及内部稳压电路等。
为了产生不同的输出电压，通常将比较器的负端接基准电压(1.23V)，正端接分压电阻网络，这样可根据输出电压的不同选定不同的阻值，其中R1=1kΩ(可调-ADJ时开路)，R2分别为1.7 kΩ(3.3V)、3.1 kΩ(5V)、8.84 kΩ(12V)、11.3 kΩ(15V)和0(-ADJ)，上述电阻依据型号不同已在芯片内部做了精确调整，因而无需使用者考虑。
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LM1575T-ADJ简易开关电源稳压器(可调1.23V~37V) 1A
LM1575HVT-3.3 3.3V简易开关电源稳压器1A
LM1575HVT-5.0 5V简易开关电源稳压器1A
LM1575HVT-12 12V简易开关电源稳压器1A
LM1575HVT-15 15V简易开关电源稳压器1A
LM1575HVT-ADJ简易开关电源稳压器(可调1.23V~37V) 1A
LM2575T-3.3 3.3V简易开关电源稳压器1A
LM2575T-5.0 5V简易开关电源稳压器1A
LM2575T-12 12V简易开关电源稳压器1A
LM2575T-15 15V简易开关电源稳压器1A
78L24正24V稳压器(100ma)
线性稳压器件(输入输出电流相等,压降3V以上)
型号稳压(V)最大输出电流可替代型号
79L05 -5V 100mA
79L06 -6V 100mA
79L08 -8V 100mA
LM7805 5V 1A L7805,LM340T5
LM7806 6V 1A L7806
LM7808 8V 1A L7808
LM2940CT-8.0 8.0V低压差稳压器
LM2940CT-9.0 9.0V低压差稳压器
LM2940CT-10 10V低压差稳压器
LM2940CT-12 12V低压差稳压器
LM2940CT-15 15V低压差稳压器
LM123K 5V稳压器(3A)
LM323K 5V稳压器(3A)
LM117K 1.2V to 37V三端正可调稳压器(1.5A)
LM385-1.2 1.2V精密基准电压源
LM385-2.5 2.5V精密基准电压源
LM399H 6.9999V精密基准电压源
LM431ACZ精密可调2.5V to 36V基准稳压源
LM723高精度可调2V to 37V稳压器
LM105高精度可调4.5V to 40V稳压器
LM305高精度可调4.5V to 40V稳压器
LM317LZ 1.2V to 37V三端正可调稳压器(0.1A)
LM317T 1.2V to 37V三端正可调稳压器(1.5A)
LM317K 1.2V to 37V三端正可调稳压器(1.5A)
LM133K三端可调-1.2V to -37V稳压器(3.0A)
LM333K三端可调-1.2V to -37V稳压器(3.0A)
LM2576HVT-5.0 5.0V简易开关电源稳压器3A
LM2576HVT-12 12V简易开关电源稳压器3A
LM2576HVT-15 15V简易开关电源稳压器3A
LM2576HVT-ADJ简易开关电源稳压器(可调1.23V~37V) 3A
78L09 9V 100ma
78L12 12V 100ma
78L15 15V 100ma
78L18 18V 100ma
78L24 24V 100ma
开关稳压器件(电压转换效率高)
型号说明最大输出电流
LM1575T-3.3 3.3V简易开关电源稳压器1A
LM1575T-5.0 5V简易开关电源稳压器1A
7918负18V稳压器(1A)
7924负24V稳压器(1A)
78L05正5V稳压器(100ma)
78L06正6V稳压器(100ma)
78L08正8V稳压器(100ma)
78L09正9V稳压器(100ma)
78L12正12V稳压器(100ma)
78L15正15V稳压器(100ma)
78L18正18V稳压器(100ma)
LM350T三端可调1.2V to 32V稳压器(3A)
LM138K三端正可调1.2V to 32V稳压器(5A)
LM338T三端正可调1.2V to 32V稳压器(5A)
LM338K三端正可调1.2V to 32V稳压器(5A)
LM336-2.5 2.5V精密基准电压源
LM336-5.0 5.0V精密基准电压源
LM2575T-ADJ简易开关电源稳压器(可调1.23V~ 37V) 1A
LM2575HVT-3.3 3.3V简易开关电源稳压器1A
LM2575HVT-5.0 5V简易开关电源稳压器1A
LM2575HVT-12 12V简易开关电源稳压器1A
LM2575HVT-15 15V简易开关电源稳压器1A
LM2575HVT-ADJ简易开关电源稳压器(可调1.23V~37V) 1A
7809正9V稳压议（1A）
7812正12V稳压器(1A)
7815正15V稳压器(1A)
7818正18V稳压器(1A)
7824正24V稳压器(1A)
7905负5V稳压器(1A)
7906负6V稳压器(1A)
7908负8V稳压器(1A)
7909负9V稳压器（1A）
7912负12V稳压器(1A)
7915负15V稳压器(1A)
LM7908 -8V 1A L7908
LM7909 -9V 1A L7909
LM7912 -12V 1A L7912
LM7915 -15V 1A L7915
LM7918 -18V 1A L7918
LM7924 -24V 1A L7924
78L05 5V 100mA
78L06 6V 100mA
78L08 8V 100ma
LM2576T-3.3 3.3V简易开关电源稳压器3A
LM2576T-5.0 5.0V简易开关电源稳压器3A
LM2576T-12 12V简易开关电源稳压器3A
LM2576T-15 15V简易开关电源稳压器3A
LM2576T-ADJ简易开关电源稳压器(可调1.23V~37V) 3A
LM2576HVT-3.3 3.3V简易开关电源稳压器3A
LM7809 9V 1A L7809
LM7812 12V 1A L7812,LM340T12
LM7815 15V 1A L7815,LM340T15
LM7818 18V 1A L7815
LM7824 24V 1A L7824
LM7905 -5V 1A L7905
LM7906 -6V 1A L7906,KA7906
MC1403 2.5V基准电压源
MC34063充电控制器
SG3524脉宽调制开关电源控制器
TL431精密可调2.5V to 36V基准稳压源
TL494脉宽调制开关电源控制器
TL497频率调制开关电源控制器
TL7705电池供电/欠压控制器
7805正5V稳压器(1A)
7806正6V稳压器(1A)
7808正8V稳压器(1A)
LM337K三端可调-1.2V to -37V稳压器(1.5A)
LM337T三端可调-1.2V to -37V稳压器(1.5A)
LM337LZ三端可调-1.2V to -37V稳压器(0.1A)
LM150K三端可调1.2V to 32V稳压器(3A)
LM350K三端可调1.2V to 32V稳压器(3A)
稳压芯片选型
常用电源及稳压芯片
LM2930T-5.0 5.0V低压差稳压器
LM2930T-8.0 8.0V低压差稳压器
LM2931AZ-5.0 5.0V低压差稳压器(TO-92)
LM2931T-5.0 5.0V低压差稳压器
LM2931CT 3V to 29V低压差稳压器(TO-220,5PIN)
LM2940CT-5.0 5.0V低压差稳压器