[{"data":1,"prerenderedAt":283},["ShallowReactive",2],{"component:lm7805:en":3},{"component":4,"localizationFallbackIssues":231,"related":232,"equivalentSlugs":282},{"schemaVersion":5,"governance":6,"id":19,"mpn":20,"slug":19,"primaryCategory":21,"manufacturers":22,"lifecycleStatus":26,"shortDescription":27,"deepTechnicalOverview":28,"packages":29,"absoluteMaximums":69,"recommendedOperating":76,"parametricAttributes":80,"gotchas":140,"datasheetUrl":17,"documentationSources":164,"applicationCircuits":179,"vendorVariants":180,"equivalents":208,"mountedOnBoards":220,"seo":221},"1.0.0",{"publication":7,"verification":10,"provenance":15},{"status":8,"publishedDate":9},"published","2026-10-11",{"status":11,"verifiedDate":9,"verifiedBy":12,"checklist":13},"verified","Serhii Shvab (owner sign-off of review pack batch 2, prepared by Claude against the cited datasheets)",{"schema":14,"technicalFacts":14,"relationships":14,"sources":14},true,{"sourceUrls":16},[17,18],"https:\u002F\u002Fwww.ti.com\u002Flit\u002Fds\u002Fsymlink\u002Flm340.pdf","https:\u002F\u002Fwww.onsemi.com\u002Fdownload\u002Fdata-sheet\u002Fpdf\u002Fmc7800-d.pdf","lm7805","LM7805","voltage_regulator",[23,24,25],"Texas Instruments","STMicroelectronics","onsemi","active","5 V, 1.5 A fixed positive linear voltage regulator with internal current limiting and thermal shutdown, in TO-220 and D2PAK packages.","The LM7805 is a three-terminal positive regulator with a fixed 5 V output, intended for local on-card regulation. Internal current limiting, thermal shutdown and safe-area protection make it hard to damage; with adequate heatsinking it delivers up to 1.5 A (2.1 A typical short-circuit current). It needs at least 7.5 V at the input to stay in regulation (about 2 V of dropout at 1 A) and accepts up to 35 V. The figures on this page come from the Texas Instruments LM340\u002FLM7805 datasheet (SNOSBT0L), cross-checked with onsemi MC7800\u002FD; 7805 regulators from STMicroelectronics, onsemi and other vendors share the pinout, but their limits and thermal figures differ slightly, so check the datasheet of the part you use.",[30,56],{"packageType":31,"pinCount":32,"bodyDimensionsMm":33,"pitchMm":37,"thermalResistanceThetaJA":38,"thermalResistanceThetaJC":39,"pins":40},"TO-220",3,{"length":34,"width":35,"height":36},10.4,4.7,9.28,2.54,54,4,[41,47,52],{"pinNumber":42,"pinName":43,"electricalType":44,"isFiveVoltTolerant":14,"internalPull":45,"description":46},1,"IN","power_in","none","Unregulated DC input (at least 7.5 V for regulation, 35 V absolute maximum)",{"pinNumber":48,"pinName":49,"electricalType":50,"isFiveVoltTolerant":14,"internalPull":45,"description":51},2,"GND","ground","Common ground (electrically connected to the TO-220 metal tab)",{"pinNumber":32,"pinName":53,"electricalType":54,"isFiveVoltTolerant":14,"internalPull":45,"description":55},"OUT","power_out","Regulated +5 V output (up to 1.5 A with adequate heatsinking)",{"packageType":57,"pinCount":32,"bodyDimensionsMm":58,"pitchMm":37,"thermalResistanceThetaJA":62,"thermalResistanceThetaJC":63,"pins":64},"D2PAK",{"length":59,"width":60,"height":61},10.16,4.57,8.89,50,1.5,[65,66,68],{"pinNumber":42,"pinName":43,"electricalType":44,"isFiveVoltTolerant":14,"internalPull":45,"description":46},{"pinNumber":48,"pinName":49,"electricalType":50,"isFiveVoltTolerant":14,"internalPull":45,"description":67},"Common ground (connected to the D2PAK tab)",{"pinNumber":32,"pinName":53,"electricalType":54,"isFiveVoltTolerant":14,"internalPull":45,"description":55},{"inputVoltageMaxV":70,"operatingTempMinC":71,"operatingTempMaxC":72,"storageTempMinC":73,"storageTempMaxC":74,"esdHbmV":75},35,0,125,-65,150,2000,{"supplyVoltageMinV":77,"supplyVoltageTypV":78,"supplyVoltageMaxV":79},7.5,10,25,[81,89,95,100,104,109,114,118,124,129,133],{"symbol":82,"name":83,"typicalValue":84,"minValue":85,"maxValue":86,"unit":87,"testCondition":88},"VOUT","Output Voltage",5,4.8,5.2,"V","TJ = 25 °C, 5 mA ≤ IO ≤ 1 A, VI = 10 V",{"symbol":90,"name":91,"typicalValue":84,"minValue":92,"maxValue":93,"unit":87,"testCondition":94},"VOUT_FULL","Output Voltage (line, load, temperature)",4.75,5.25,"PD ≤ 15 W, 5 mA ≤ IO ≤ 1 A, 7.5 V ≤ VIN ≤ 20 V, 0–125 °C",{"symbol":96,"name":97,"typicalValue":98,"minValue":77,"unit":87,"testCondition":99},"VIN_MIN","Input Voltage Required for Regulation","—","TJ = 25 °C, IO ≤ 1 A",{"symbol":101,"name":102,"typicalValue":48,"unit":87,"testCondition":103},"VDROP","Dropout Voltage","TJ = 25 °C, IO = 1 A (no maximum specified)",{"symbol":105,"name":106,"typicalValue":63,"unit":107,"testCondition":108},"IOUT","Output Current","A","With adequate heatsinking",{"symbol":110,"name":111,"typicalValue":112,"unit":107,"testCondition":113},"ISC","Short-Circuit Current",2.1,"TJ = 25 °C",{"symbol":115,"name":116,"typicalValue":117,"unit":107,"testCondition":113},"IPK","Peak Output Current",2.4,{"symbol":119,"name":120,"typicalValue":98,"maxValue":121,"unit":122,"testCondition":123},"IQ","Quiescent Current",8,"mA","TJ = 25 °C, IO ≤ 1 A (8.5 mA max over temperature)",{"symbol":125,"name":126,"typicalValue":32,"maxValue":62,"unit":127,"testCondition":128},"RegLine","Line Regulation","mV","TJ = 25 °C, IO = 500 mA, 7 V ≤ VIN ≤ 25 V",{"symbol":130,"name":131,"typicalValue":78,"maxValue":62,"unit":127,"testCondition":132},"RegLoad","Load Regulation","TJ = 25 °C, 5 mA ≤ IO ≤ 1.5 A",{"symbol":134,"name":135,"typicalValue":136,"minValue":137,"unit":138,"testCondition":139},"RR","Ripple Rejection",80,62,"dB","f = 120 Hz, 8 V ≤ VIN ≤ 18 V, TJ = 25 °C, IO ≤ 1 A",[141,146,151,156,160],{"title":142,"severity":143,"description":144,"mitigationStrategy":145},"Heat Dissipation and Heatsinking","critical","A linear regulator turns all excess voltage into heat: PD = (VIN − 5 V) × IO, and the junction reaches TJ = TA + PD × θJA. A 500 mA load from 12 V dissipates 3.5 W; in free air the TO-220 (θJA 54 °C\u002FW) would rise about 189 °C, so the regulator goes into thermal shutdown.","Keep TJ at or below 125 °C: lower the input voltage, add a heatsink (θJA becomes θJC 4 °C\u002FW plus the heatsink and interface resistance), or use a switching regulator.",{"title":147,"severity":148,"description":149,"mitigationStrategy":150},"Input Below 7.5 V Loses Regulation","warning","TI specifies 7.5 V as the input needed to maintain line regulation (dropout is about 2 V at 1 A). When the input sags below that — a discharged 9 V battery or ripple troughs of a loaded transformer supply — ripple passes through to the 5 V rail.","Make sure the lowest point of the input, including ripple, stays at or above 7.5 V at full load.",{"title":152,"severity":153,"description":154,"mitigationStrategy":155},"Capacitors: When They Are Needed","info","TI: the input capacitor (0.22 µF) is required only if the regulator is far from the supply filter (more than about 6 in \u002F 150 mm); the output capacitor is not needed for stability but a 0.1 µF ceramic improves transient response. onsemi warns that output capacitors below 0.1 µF can cause instability.","Fit 0.22–0.33 µF from IN to GND and 0.1 µF from OUT to GND, close to the pins.",{"title":157,"severity":148,"description":158,"mitigationStrategy":159},"Large Output Capacitor and an Input Short","If the input is shorted to ground while a large output capacitor is charged, the capacitor discharges backwards through the regulator and can destroy it. TI: generally no protection diode is needed for output capacitance up to 10 µF.","With more than 10 µF on the output, add a diode from OUT (anode) to IN (cathode).",{"title":161,"severity":148,"description":162,"mitigationStrategy":163},"Floating Ground Pin","If only the ground pin is disconnected, the output rises towards the unregulated input voltage and can damage the circuits on the 5 V rail; reconnecting ground with power on can damage the regulator. This typically happens when plugging modules into a powered socket.","Turn power off before plugging, or make sure ground connects first.",[165,173],{"title":166,"url":17,"type":167,"authority":168,"publisher":23,"documentNumber":169,"revision":170,"releaseDate":171,"language":172},"LM340, LM340A and LM7805 Family Wide VIN 1.5-A Fixed Voltage Regulators","datasheet","primary","SNOSBT0L","L","2016-09","EN",{"title":174,"url":18,"type":167,"authority":175,"publisher":25,"documentNumber":176,"revision":177,"releaseDate":178,"language":172},"MC7800, MC7800A, MC7800AE, NCV7800 Positive Voltage Regulators","secondary","MC7800\u002FD","29","2021-11",[],[181],{"manufacturer":25,"mpn":182,"sourceUrl":18,"verifiedDate":9,"parameters":183,"notes":207},"MC7805CT",{"param:VOUT":184,"param:VOUT_FULL":185,"param:VDROP":187,"param:IOUT":188,"param:IPK":190,"param:IQ":192,"param:RegLoad":195,"param:RR":197,"abs:inputVoltageMaxV":199,"abs:storageTemp":200,"thermal:TO-220:thetaJA":202,"thermal:TO-220:thetaJC":205,"thermal:D2PAK:thetaJC":206},{"minValue":85,"typicalValue":84,"maxValue":86,"unit":87},{"minValue":92,"typicalValue":84,"maxValue":93,"unit":87,"note":186},"Specified for 7.0 V ≤ VIN ≤ 20 V",{"typicalValue":48,"unit":87},{"typicalValue":42,"unit":107,"note":189},"Rated for output current in excess of 1.0 A",{"typicalValue":191,"unit":107},2.2,{"typicalValue":193,"maxValue":194,"unit":122},3.2,6.5,{"typicalValue":196,"maxValue":79,"unit":127},1.3,{"minValue":137,"typicalValue":198,"unit":138},83,{"maxValue":70,"unit":87},{"minValue":73,"maxValue":74,"unit":201},"°C",{"typicalValue":203,"unit":204},65,"°C\u002FW",{"typicalValue":84,"unit":204},{"typicalValue":84,"unit":204},"Same pinout; the heatsink surface (tab) is connected to pin 2 (ground). C grade: junction 0…125 °C.",[209,213,215],{"equivalentMpn":210,"manufacturer":24,"compatibilityType":211,"parameterDifferences":212},"L7805CV","pin_to_pin_drop_in","Same TO-220 pinout (IN, GND, OUT); check the ST L78 datasheet for its exact limits.",{"equivalentMpn":182,"manufacturer":25,"compatibilityType":211,"parameterDifferences":214},"Same TO-220 pinout; onsemi rates the MC7800 series for output current in excess of 1.0 A and gives θJA 65 °C\u002FW for TO-220.",{"equivalentMpn":216,"manufacturer":217,"compatibilityType":218,"parameterDifferences":219},"TSR 1-2450","Traco Power","differing_electrical_limits","Switching regulator module in a TO-220-compatible footprint; check input range, output current and output noise in the Traco datasheet.",[],{"canonicalUrl":222,"metaTitle":223,"metaDescription":224,"primarySearchCluster":225,"structuredDataSchema":230},"https:\u002F\u002Fcircuitbase.tech\u002Fcomponent\u002Flm7805","LM7805 5V Regulator Pinout, Datasheet & Heatsink Guide | CircuitBase","LM7805 pinout (TO-220, D2PAK), 7.5 V minimum input, dropout, heatsink calculation, capacitors and protection diode, from the TI datasheet.",[226,227,228,229],"lm7805 pinout","lm7805 datasheet","lm7805 5v regulator circuit","lm7805 heatsink calculation","Product",null,[233,249,267],{"id":234,"slug":234,"mpn":235,"primaryCategory":21,"manufacturers":236,"shortDescription":239,"packages":240,"packageTypes":243,"voltage":244,"recommendedOperating":248},"ams1117-3-3","AMS1117-3.3",[237,238],"Advanced Monolithic Systems","Various","1A low-dropout positive linear voltage regulator with fixed 3.3V output in SOT-223 package.",[241],{"packageType":242,"pinCount":39},"SOT-223",[242],{"context":245,"min":92,"max":246,"typical":84,"outputTypical":247},"input",15,3.3,{"supplyVoltageMinV":92,"supplyVoltageTypV":84,"supplyVoltageMaxV":246},{"id":250,"slug":250,"mpn":251,"primaryCategory":252,"manufacturers":253,"shortDescription":255,"packages":256,"packageTypes":261,"voltage":262,"recommendedOperating":266},"ne555","NE555P","timer_driver",[23,24,25,254],"Diodes Incorporated","Industry-standard precision bipolar timer IC for astable multivibrators, monostable pulse generation, and PWM controllers.",[257,259],{"packageType":258,"pinCount":121},"DIP-8",{"packageType":260,"pinCount":121},"SOIC-8",[258,260],{"context":263,"min":264,"max":265,"typical":84},"supply",4.5,16,{"supplyVoltageMinV":264,"supplyVoltageTypV":84,"supplyVoltageMaxV":265},{"id":268,"slug":268,"mpn":269,"primaryCategory":270,"manufacturers":271,"shortDescription":273,"packages":274,"packageTypes":277,"voltage":278,"recommendedOperating":281},"ch340g","CH340G","interface_bridge",[272],"WCH (Jiangsu Qinheng)","USB to UART serial bridge in SOP-16 with modem signals and an external 12 MHz crystal, common on low-cost Arduino-compatible and ESP8266 boards.",[275],{"packageType":276,"pinCount":265},"SOP-16",[276],{"context":263,"min":279,"max":280,"typical":84},2.9,5.3,{"supplyVoltageMinV":279,"supplyVoltageTypV":84,"supplyVoltageMaxV":280},{},1791754292198]