MC78M12中文资料一、产品概述MC78M12是一款性能稳定的正电压稳压器，采用TO220封装，具有输出电流大、纹波抑制比高等特点。
该产品广泛应用于电子设备、工业控制、通信设备等领域，为您的电路提供稳定可靠的电源保障。
二、产品特点1. 输出电压：+12V2. 输出电流：可达1.5A3. 线性调整率：≤0.01%4. 负载调整率：≤0.1%5. 纹波抑制比：≥60dB6. 工作温度范围：40℃至+125℃7. 安全保护：过流保护、过热保护三、应用领域1. 电子产品：如电视、音响、计算机等2. 工业控制：如PLC、变频器、伺服驱动器等3. 通信设备：如交换机、路由器、光端机等4. 电源模块：如各种DCDC模块、ACDC模块等5. 其他需要稳定电压供电的场合四、电气参数1. 输入电压：18V至35V2. 输出电压：+12V3. 输出电流：1.5A（最大）4. 线性调整率：≤0.01%5. 负载调整率：≤0.1%6. 纹波抑制比：≥60dB7. 工作温度范围：40℃至+125℃8. 绝缘电阻：≥100MΩ五、安装与使用注意事项1. 安装前请确认输入电压、输出电压及电流等参数是否符合产品要求。
2. 确保安装过程中，引脚不受到外力损伤，以免影响产品性能。
4. 在使用过程中，请勿超过产品的最大负载电流，以免损坏产品。
5. 请遵循正确的电路设计原则，确保电路稳定可靠。
六、产品封装与尺寸封装类型：TO220尺寸（mm）：长10.16 x 宽4.57 x 高18.71引脚中心距离（mm）：2.54请确保在电路板设计时，留有足够的空间以保证散热器的安装和空气流通。
七、安全准则1. 在操作前，请确保输入电源已经断开，以防止电击。
2. 避免在潮湿的环境下使用MC78M12，以免引起短路或漏电。
3. 不要将MC78M12暴露在高温或明火中，以免损坏产品或引起火灾。
4. 在安装或维护MC78M12时，请使用适当的绝缘工具，并采取防静电措施。
Rev. 5.0Features•Output Current up to 0.5A•Output V oltages of 5, 6, 8, 10, 12, 15, 18, 20, 24V •Thermal Overload Protection •Short Circuit Protection•Output Transistor Safe Operating area (SOA)ProtectionDescriptionThe MC78MXX/LM78MXX series of three-terminal posi-tive regulators are available in the TO-220/D-PAK package with several fixed output voltages making it useful in a wide range of applications.TO-220D-PAK1. Input2. GND3. Output11Internal Block DigramMC78MXX/LM78MXX3-terminal 0.5A positive voltage regulatorMC78MXX/LM78MXXAbsolute Maximum RatingsElectrical Characteristics (MC78M05/LM78M05)(Refer to the test circuits, 0 < T J < +125°C, I O =350mA, V I =10V , unless otherwise specified, C I = 0.33µF, C O =0.1µF)Notes:*Load and line regulation are specified at constant junction temperature. Change in V o due to heating effects must be takeninto account separately. Pulse testing with low duty is used.ParameterSymbol Value Unit Input Voltage (for V O = 5V to 18V)(for V O = 24V)V I V I 3540V V Thermal Resistance Junction-CasesR θJC 5°C/W Thermal Resistance Junction-Air (TO-220 Package)R θJA 65°C/W Operating Temperature Range MC78MXX/LM78MXX T OPR 0~ + 125°C Storage Temperature RangeT STG-65~ + 150°CParameterSymbolConditionsMin.Typ.Max.Unit Output VoltageV OT J =+25°C4.855.2VI O = 5 to 350mA V I = 7 to 20V 4.755 5.25Line Regulation ∆V O I O = 200mA T J =+25°CV I = 7 to 25V --100mV V I = 8 to 25V--50Load Regulation ∆V O I O = 5mA to 0.5A, T J =+25°C --100mV I O = 5mA to 200mA, T J =+25 °C --50Quiescent Current I Q T J =+25°C- 4.06mA Quiescent Current Change∆I Q I O = 5mA to 350mA --0.5mAI O = 200mA V I = 8 to 25V --0.8Output Voltage Drift ∆V/∆T I O = 5mAT J = 0 to +125°C -−0.5-mV/°COutput Noise Voltage V N f = 10Hz to 100KHz -40-µVRipple Rejection RR f = 120Hz, I O = 300mA V I = 8 to 18V62--dB Dropout Voltage V D T J =+25°C, I O = 500mA -2-V Short Circuit Current I SC T J =+25°C, V I = 35V -300-mA Peak CurrentI PKT J =+25°C-700-mAMC78MXX/LM78MXXElectrical Characteristics (MC78M06)(Refer to the test circuits, 0 ≤ T J ≤ +125°C, I O =350mA, V I =11V , unless otherwise specified, C I = 0.33µF, C O =0.1µF)Notes:*Load and line regulation are specified at constant, junction temperature. Change in V o due to heating effects must be takeninto account separately. Pulse testing with low duty is used.ParameterSymbolConditionsMin.Typ.Max.Unit Output VoltageV OTJ=+25°C5.7566.25VI O = 5 to 350mA V I = 8 to 21V 5.76 6.3Line Regulation ∆V O I O = 200mA T J =+25°CV I = 8 to 25V --100mV V I = 9 to 25V--50Load Regulation ∆V O I O = 5mA to 0.5A, T J =+25°C --120mV I O = 5mA to 200mA, T J =+25°C --60Quiescent Current I Q T J =+25°C- 4.06mA Quiescent Current Change∆I Q I O = 5mA to 350mA --0.5mAI O = 200mA V I = 9 to 25V --0.8Output Voltage Drift ∆V/∆T I O = 5mAT J = 0 to +125°C -− 0.5-mV/°COutput Noise Voltage V N f = 10Hz to 100KHz -45-µVRipple Rejection RR f = 120Hz, I O = 300mA V I = 9 to 19V59--dB Dropout Voltage V D T J =+25°C, I O = 500mA -2-V Short Circuit Current I SC T J = +25°C, V I = 35V -300-mA Peak CurrentI PKT J =+25°C-700-mAMC78MXX/LM78MXXElectrical Characteristics (MC78M08)(Refer to the test circuits, 0 ≤ T J ≤ +125°C, I O =350mA, V I =14V , unless otherwise specified, C I =0.33µF, C O =0.1µF)Notes:*Load and line regulation are specified at constant, junction temperature. Change in V o due to heating effects must be takeninto account separately. Pulse testing with low duty is used.ParameterSymbolConditionsMin.Typ.Max.Unit Output VoltageV OT J =+25 °C7.788.3VI O = 5 to 350mA V I = 10.5 to 23V 7.688.4Line Regulation ∆V O I O = 200mA T J =+25°CV I = 10.5 to 25V --100mV V I = 11 to 25V--50Load Regulation ∆V O I O = 5mA to 0.5A, T J =+25°C --160mV I O = 5mA to 200mA, T J =+25°C --80Quiescent Current I Q T J =+25°C- 4.06mA Quiescent Current Change∆I Q I O = 5mA to 350mA --0.5mAI O = 200mA V I = 10.5 to 25V --0.8Output Voltage Drift RR I O = 5mAT J = 0 to +125°C -−0.5-mV/°COutput Noise Voltage V N f = 10Hz to 100KHz -52-µVRipple Rejection RR f = 120Hz, I O = 300mA V I = 9 to 19V56--dB Dropout Voltage V D T J =+25°C, I O = 500mA -2-V Short Circuit Current I SC T J =+25°C, V I = 35V -300-mA Peak CurrentI PKT J =+25°C-700-mAElectrical Characteristics (MC78M12)(Refer to the test circuits, 0 ≤ T J ≤125°C, I O =350mA, V I =19V , unless otherwise specified, C I =0.33µF, C O =0.1µF)Notes:*Load and line regulation are specified at constant, junction temperature. Change in V o due to heating effects must be takeninto account separately. Pulse testing with low duty is used.ParameterSymbolConditionsMin.Typ.Max.Unit Output VoltageV OT J =+25°C11.51212.5VI O = 5 to 350mA V I = 14.5 to 27V 11.51212.6Line Regulation ∆V O I O = 200mA T J =+25°CV I = 14.5 to 30V --100mV V I = 16 to 30V--50Load Regulation ∆V O I O = 5mA to 0.5A, T J =+25°C --240mV I O = 5mA to 200mA, T J =+25°C --120Quiescent Current I Q T J =+25°C- 4.16mA Quiescent Current Change∆I Q I O = 5mA to 350mA --0.5mAI O = 200mA V I = 14.5 to 30V --0.8Output Voltage Drift ∆V/∆T I O = 5mAT J = 0 to +125°C -− 0.5-mV/°COutput Noise Voltage V N f = 10Hz to 100KHz -75-µVRipple Rejection RR f = 120Hz, I O = 300mA V I = 15 to 25V55-dB Dropout Voltage V D T J =+25°C, I O = 500mA -2-V Short Circuit Current I SC T J = +25°C, V I = 35V -300-mA Peak CurrentI PKT J = +25°C-700-mAElectrical Characteristics (MC78M15)(Refer to the test circuits, 0 < T J < +125°C, I O =350mA, V I =23V , unless otherwise specified, C I = 0.33µF, C O =0.1µF )Notes:*Load and line regulation are specified at constant, junction temperature. Change in V o due to heating effects must be takeninto account separately. Pulse testing with low duty is used.ParameterSymbol ConditionsMin.Typ.Max.Unit Output VoltageV OT J =+25°C 14.41515.6VI O = 5 to 350mA V I = 17.5 to 30V 14.251515.75Line Regulation ∆V O I O = 200mA T J =+25°CV I = 17.5 to 30V --100mV V I = 20 to 30V--50Load Regulation ∆V O I O = 5mA to 0.5A, T J =+25°C --300mV I O = 5mA to 200mA, T J =+25°C --150Quiescent Current I Q T J =+25°C- 4.16mA Quiescent Current Change∆I Q I O = 5mA to 350mA --0.5mAI O = 200mA V I = 17.5 to 30V --0.8Output Voltage Drift ∆V/∆T I O = 5mAT J = 0 to +125°C -− 1-mV/°COutput Noise Voltage V N f = 10Hz to 100KHz -100-µVRipple Rejection RR f = 120Hz, I O = 300mA V I = 18.5 to 28.5V 54--dB Dropout Voltage V D T J =+25°C, I O = 500mA -2-V Short Circuit Current I SC T J = +25°C, V I = 35V -300-mA Peak CurrentI PKT J = + 25°C-700-mAMC78MXX/LM78MXXElectrical Characteristics (MC78M18)(Refer to the test circuits, 0 ≤ T J ≤ +125°C, I O =350mA, V I =26V , unless otherwise specified, C I = 0.33µF, C O =0.1µF)Notes:*Load and line regulation are specified at constant, junction temperature. Change in V o due to heating effects must be takeninto account separately. Pulse testing with low duty is used.ParameterSymbolConditionsMin.Typ.Max.Unit Output VoltageV OT J =+25°C17.31818.7VI O = 5 to 350mA V I = 20.5 to 33V 17.11818.9Line Regulation ∆V O I O = 200mA T J =+25°CV I = 21 to 33V --100mV V I = 24 to 33V--50Load Regulation ∆V ΟI O = 5mA to 0.5A, T J =+25°C --360mV I O = 5mA to 200mA, T J =+25°C --180Quiescent Current I Q T J =+25°C - 4.26mA Quiescent Current Change ∆I Q I O = 5mA to 350mA --0.5mA I O = 200mA V I = 21 to 33V--0.8Output Voltage Drift ∆V/∆T I O =5mAT J =0 to 125°C -−1.1-mV/°C Output Noise Voltage V N f=10Hz to 100KHz-100-µV Ripple Rejection RR f=120Hz, I O =300mA , V I =22 to 32V 53--dB Dropout Voltage V D T J =+25°C, I O =500mA -2-V Short Circuit Current I SC T J =+25°C, V I =35V -300-mA Peak CurrentI PKT J =+25°C-700-mAMC78MXX/LM78MXXElectrical Characteristics (MC78M20)(Refer to the test circuits, 0 ≤ T J ≤ +125°C, I O =350mA, V I =29V , unless otherwise specified, C I = 0.33µF, C O =0.1µF )Notes :*Load and line regulation are specified at constant, junction temperature. Change in V o due to heating effects must be takeninto account separately. Pulse testing with low duty is used.ParameterSymbol ConditionsMin.Typ.Max.Unit Output VoltageV OT J = +25°C 19.22020.8VI O = 5 to 350mA V I = 23 to 35V192021Line Regulation ∆V O I O = 200mA T J =+25°C V I = 23 to 35V --100mV V I = 24 to 35V --50Load Regulation ∆V O I O = 5mA to 0.5A, T J =+25°C --400mV I O = 5mA to 200mA, T J =+25°C --200Quiescent Current I Q T J =+25°C- 4.26mA Quiescent Current Change∆I Q I O = 5mA to 350mA --0.5mAI O = 200mA V I = 23 to 35V --0.8Output Voltage Drift ∆V/∆T I O = 5mAT J = 0 to +125°C -−1.1-mV/°COutput Noise Voltage V N f = 10Hz to 100KHz -110-µVRipple Rejection RR f = 120Hz, I O = 300mA V I = 24 to 34V53--dB Dropout Voltage V D T J =+25°C, I O = 500mA -2-V Short Circuit Current I SC T J = +25°C, V I = 35V -300-mA Peak CurrentI PKT J = +25°C-700-mAMC78MXX/LM78MXXElectrical Characteristics (MC78M24)(Refer to the test circuits, 0 ≤ T J ≤ +125°C, I O =350mA, V I =33V , unless otherwise specified, C I = 0.33µF, C O =0.1µF )Notes:*Load and line regulation are specified at constant, junction temperature. Change in V o due to heating effects must be takeninto account separately. Pulse testing with low duty is used.ParameterSymbolConditionsMin.Typ.Max.Unit Output VoltageV OT J =+25°C232425VI O = 5 to 350mA V I = 27 to 38V22.82425.2Line Regulation ∆V O I O = 200mA T J =+25°C V I = 27 to 38V --100mV V I = 28 to 38V --50Load Regulation ∆V O I O = 5mA to 0.5A, T J =+25°C --480mV I O = 5mA to 200mA, T J =+25°C --240Quiescent Current I Q T J =+25°C- 4.26mA Quiescent Current Change∆I Q I O = 5mA to 350mA --0.5mAI O = 200mA V I = 27 to 38V --0.8Output Voltage Drift ∆V/∆T I O = 5mAT J = 0 to +125°C -− 1.2-mV/°COutput Noise Voltage V N f = 10Hz to 100KHz -170-µVRipple Rejection RR f = 120Hz, I O = 300mA V I = 28 to 38V50--dB Dropout Voltage V D T J =+25°C, I O = 500mA -2-V Short Circuit Current I SC T J = +25 °C, V I = 35V -300-mA Peak CurrentI PKT J =+25°C-700-mAMC78MXX/LM78MXXTypical ApplicationsFigure 1.Fixed Output RegulatorFigure 2.Constant Current RegulatorNotes:1.To specify an output voltage, substitute voltage value for "XX"2.Although no output capacitor is needed for stability, it does improve transient response.3.Required if regulator is located an appreciable distance from power Supply filterFigure 3.Circuit for Increasing Output VoltageV IV oMC78MXX LM78MXXV ILM78MXXMC78MXX LM78MXXMC78MXXMC78MXX/LM78MXXMC78M05LM78M05LM741Figure 4.Adjustable Output Regulator (7 to 30V)MC78M05LM78M05LM741Figure 5.0.5 to 10V RegulatorMechanical DimensionsPackageTO-220Mechanical Dimensions (Continued) PackageD-PAKMC78MXX/LM78MXXOrdering InformationProduct Number Package Operating TemperatureLM78M05CTTO-2200 ~ + 125°CProduct Number Package Operating TemperatureMC78M05CT TO-2200 ~ + 125°CMC78M06CT MC78M08CT MC78M12CT MC78M15CT MC78M18CT MC78M20CT MC78M24CT MC78M05CDT D-PAKMC78M08CDT MC78M12CDTMC78MXX/LM78MXXMC78MXX/LM78MXXLIFE SUPPORT POLICYFAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR INTERNATIONAL. As used herein:1.Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure toperform when properly used in accordance withinstructions for use provided in the labeling, can bereasonably expected to result in a significant injury of the user.2. A critical component in any component of a life supportdevice or system whose failure to perform can bereasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.。
