The Kynix Components

1N4148 Diode is a fast switching diode. It is fabricated in planar technology, and encapsulated in hermetically sealed leaded glass SOD27 (DO-35) packages. In the blog today, we 'll introduce 1N4148 systematically from its pinout, features, applications to its equivalents, package, etc, some frequent asked questions are also listed below at the bottom of the page, thanks for reading and hope this is helpful!TOP2 Electronic projects with Diode 1N4148.Catalog1N4148 Description1N4148 Pin Configuration1N4148 Features1N4148 Applications1N4148 CAD Models1N4148 Package Outline1N4148 Equivalent Diodes1N4148 Popularity by Region1N4148 Market Price AnalysisComponent DatasheetFAQOrdering & Quantity1N4148 DescriptionA diode is a device which allows current flow through only one direction. That is the current should always flow from the Anode to cathode. The cathode terminal can be identified by using a grey bar as shown in the picture above. For 1N4148 Diode, the maximum current carrying capacity is 300mA it can withstand peaks up to 2A. The speciality of this diode is its fast recovery time of 8ns at a forward current of 10mA, hence this diode is used in places where fast switching are involved.1N4148 Pin Configuration1N41481N4148 Pinout Pin NameDescriptionAnodeCurrent always Enters through AnodeCathodeCurrent always Exits through Cathode 1N4148 FeaturesFast switching DiodePeak repetitive Reverse voltage is 100VRMS reverse voltage is 75VPeak forward surge current is 2AForward continuous current If 300mAReverse recovery time 8nsAvailable in DO-35 Package1N4148 ApplicationsCan be used to prevent reverse polarity problemProtect Power electronic switches that are operating with high switching frequency.Half Wave and Full Wave rectifiersUsed as a protection deviceCurrent flow regulators1N4148 CAD ModelsPart SymbolFootprint3D Model1N4148 Package Outline 1N4148 Equivalent Diodes1N914, IN914A, 1N914B, 1N916, 1N916A, 1N916B, 1N4448, 1N4448WS, 1N4448W, 1N4148WS1N4148 Popularity by Region1N4148 Market Price AnalysisComponent Datasheet1N4148 DatasheetFAQIs 1n4148 a Schottky diode?First 1N4148 isn't Schottky diode. It's true it is a switching diode (fast) but not Schottky.What is a switching diode used for?A switching diode is suitable for switching a small signal of up to 100 mA, acting as a rectifier. In contrast, a rectifier diode is used for AC line rectification (from alternating current to direct current). Switching diodes are designed to handle a voltage of less than tens of volts.What do 4148 and N in diode 1N4148 mean?XNXXXX, this is the representation of semi-conducting bulk components of the American Standards Association. XXXX represents the model number, usually a string of numbers.N means PN junction. The number in front represents the number of PN junctions. For example, 1N4148 means that it has only one PN junction (ie diode), and 4148 is the model number. Similar to 1N4007, 1N4734 and the like are diodes.2N means that there are two PN junctions, which are triodes or field effect transistors. For example, common 2N3904, 2N2222 and the like are triodes. 2N5515 is a field effect tube (N-channel JFET)Many 4N and 6N are photocouplers, such as 4N25, 6N137 and so on.What is the difference between 1N4148 and 1N4007?1N4148 is a commonly used switching diode (normal forward current If: 150mA, maximum repetitive peak voltage Umax: 100V, reverse recovery time trr: 4ns). IN4007 is also a common rectifier diode (positive power constant forward current If:1A, maximum repetitive peak voltage Umax:1000V). So they are diodes with different characteristics.What are the functions of the diode 1N4148 in the circuit?It plays the role of detection, freewheeling and rectification of small currentsHow do I know if my diode 1n4148 is broken?Identify the positive and negative poles of the 1n4148 diode, one end with a white line is the negative pole, and the other end is the positive pole.Set the knob on the multimeter to the on-off capacity position, and insert the red and black test leads into the correct position of the multimeter.Connect the red test lead to the anode of the diode and the black test lead to the cathode. Then observe the reading, if it overflows (that is, it shows 1), the diode is broken. If there is a reading, exchange the test leads. If there is a reading but not overflow, the diode is broken.What is the difference between IN4148 and LL4148?LL4148 usually refers to the glass sealed cylindrical LL-34 package (SMD, no leads).1N4148 usually refers to DO-35 glass seal, axial pin, plug-in. It can be braided or in bulk. 

CR1632 is Lithium Coin Battery.CR1632 is a lithium coin cell battery that is commonly used in portable electronics gadgets that consume low power, such as watches, toys, RFID readers, etc.This blog provides you with a basic overview of the CR1632 Battery including its functions and specifications, equivalent products, etc., to help you quickly understand what  CR1632 is.We will be glad to find that this blog can be useful for people loving electronic components :)There's a Video Introducing 7 Best CR1632 Batteries in 2020CatalogCR1632 Terminal DescriptionCR1632 SpecificationsCR1632 EquivalentOther Lithium Coin CellsHow to Calculate Run Time of CR1632Internal Resistance CharacteristicsCR1632 ApplicationCR1632 PackageComponent DatasheetFAQCR1632 Terminal DescriptionPin NumberPin NameDescription1Positive TerminalThe upper side where the markings are found is the positive terminal.2Negative TerminalThe lower side of the battery is the negative terminal.Note: These batteries can only be used through a cell holder, it is not recommended to solder or tamper the battery.CR1632 SpecificationsNon-Rechargeable Lithium coin cell BatteryNominal Voltage: 3VBattery Capacity: 130mAhContinuous drain current: 0.19mAPeak drain current: 6.8mAWeight: 1.8 gramsCR1632 EquivalentDL1632, ECR1632Other Lithium Coin CellsCR2032, CR2025Other Lithium Coin CellsThe CR1632 battery is very similar to CR2032 or CR2025 but is not interchangeable due to its size. The name of the CR1632 indicates that the battery is 16mm wide and 3.2mm thick. It is rated at 3V and 130mAh capacity.How to Calculate Run Time of CR1632The battery life depends on many parameters, such as operating temperature, discharge current, dynamic loads, etc. But let us assume, for simplicity's sake, that we are powering a normal load of about 15K ohms at 20°C. Then, in that case, the capacity of our battery is 130mAh. This means that if we draw 130mA, then our battery will last for 1 hour and, similarly, if we draw 65mA, the battery will last for 2 hours. But these batteries are rated for a small output current, so if our load consumes only about 0.19mA then the battery should last for (130/0.19) 684 hours. However, due to the varying current and operating temperature of the system, this figure will not be accurate. The CR1632 data sheet also provides a neat graph that can be understood in the same way.Internal Resistance CharacteristicsAnother important parameter to consider when deciding on your battery is the internal resistance of the battery. Unfortunately, any battery will have some internal resistance associated with it, which will prevent you from drawing the full current from the battery. The lower the IR (Internal Resistance) the more current you will draw from it and the higher the performance of the battery, the higher the IR of the battery as it ages or due to its operating environment.When conducting Pulse Test at 25°C, the continuous outflow at 15k ohms is 0.19mA @ 2.9V. And the pulse drain is 6.8mA @ 2.7V per 2 seconds *12 times/delay at 400 ohms.CR1632 ApplicationSmall PDA devicesWireless doorbell for houseElectronic ToysPotable electronicsDigital thermometersDigital altimeterCyclocomputersHeart rate monitorsCR1632 PackageThat’s all for our introduction to the CR1632 Lithium Coin Battery. If you find this blog useful, please bookmark our website Apogeeweb, we will provide you with electronic component blogs, industry news, tools, etc. that you are interested in. Stay tuned for our next blog…Component DatasheetCR1632 DatadsheetFAQWhat Battery is Equivalent to CR1632?CR1632 Battery Equivalents are as follows: BR1632, BR 1632, BR1612-1W, CR1632, CR 1632, DL1632, DL1612B, ECR1632, E-CR1632, KCR1632, KECR1632, KL1632, L1632, LITH34, LITH-34 Good for Car remotes, Watches, Cameras, Calculators, Car Security Alarm, Organizers, Glucometer, Computer Equipment and other ...Can I Use CR2016 Instead of CR1632?No, it probably won't physically fit in the battery socket. This is because a CR2016 is wider than a CR1620. (The CR2016 is also thinner too.)What Are 1632 Batteries Used For?The CR1632 batteries are often used in car key remotes, watches, toys and other electronic appliances. The Panasonic Lithium coin batteries provide long-lasting reliable power.Are 1620 And 1632 Batteries the Same?No. 1632 battery is differ from 1620 it are similar alike it as the same volt and look the same. Depending on what you using the battery for it wouldn't be no harm if you replace a Cr1632 with a Cr1620 you will just have less usage out of the Cr1620 than Cr1632 that all.What is the Best CR1632 Battery?Panasonic CR1632 Multi Purpose including Remote Control for Cars 3 Volt Lithium Coin Battery-pack of 5. ...SONY CR1632 3 Volt Lithium Coin Battery 10 Pack (2 packs of 5) ...LiCB 10 Pack CR1632 3V Lithium Battery CR 1632.Is DL1632 Same as CR1632?Example of a Duracell battery will be DL1632 but it will be the same as CR1632 they both are lithium battery and most time those battery are us in your key remote such as a Lexus, Toyota. As long it a lithium battery that shape like the size of of a dime than it will be the same battery.Are CR2430 and CR2032 Interchangeable?​CR2430 coin cell batteries are known for being slightly wider than their CR2025 and CR2032 counterparts. ... Security sensors that use coin batteries like the CR2430 are usually small and unobtrusive. But since the CR2430 batteries are wider, they cannot be used interchangeably with CR2025 and CR2032 batteries.Are CR2016 and CR2032 Interchangeable?Originally Answered: Can CR2016, CR2025, CR2032 "coin batteries" be used interchangably? electrically speaking they have the same voltage so they will drive a circuit the same. However they are different physical sizes so they are not physically interchangeable.Will a 1632 Battery Work on 1616?Putting the thicker battery into aholder designed for the smaller one may damage the holder and makeit incapable of being used for the proper sized battery. The CR1616 is rated for 50 mA.

LM35 is a type of commonly used temperature sensor, that can be used to measure temperature with an electrical output comparative to the temperature in (°C). It can measure temperature in a better way than thermistor. How to interface LM35 Temperature Sensor with Arduino & demonstration.CatalogLM35 OverviewLM35 PinoutLM35 Functional Block DiagramLM35 FeaturesLM35 ParametersLM35 EquivalentsLM35 Working PrincipleHow to use LM35 Temperature SensorLM35 ApplicationsLM35 PackageComponent DatasheetFAQLM35 OverviewLM35 is a commonly used temperature sensor that shows values in the form of output voltages instead of degrees Celsius, it shows high voltage values than thermocouples and may not require the output voltage to be amplified. The output voltage of LM35 is proportional to the temperature of Celsius. The scale factor is 0.01 V/°C.  One of the most important characteristics of LM35 is that it draws only 60 microamps from its supply and has a low self-heating capacity. LM35 temperature sensor available in a variety of packages, such as T0-46 metal transistor-like package, TO-92 plastic transistor-like package, 8-lead surface mounted SO-8 small outline package.LM35 PinoutLM35 Temperature SensorLM35 Pinout Pin NumberPin NameDescription1VccInput voltage is +5V for typical applications2Analog OutThere will be increase in 10mV for raise of every 1°C. Can range from -1V(-55°C) to 6V(150°C)3GroundConnected to ground of circuitLM35 Functional Block DiagramLM35 Functional Block DiagramLM35 FeaturesMinimum and Maximum Input Voltage is 35V and -2V respectively. Typically 5V.Can measure temperature ranging from -55°C to 150°COutput voltage is directly proportional (Linear) to temperature (i.e.) there will be a rise of 10mV (0.01V) for every 1°C rise in temperature.±0.5°C  AccuracyDrain current is less than 60uA  Low cost temperature sensorSmall and hence suitable for remote applicationsAvailable in TO-92, TO-220, TO-CAN and SOIC packageLM35 ParametersParameterConditionsValueUnitAccuracy LM35, LM 35CT A=+25˚C±0.4˚CAccuracy, LM35DT A=+25˚C±0.6˚CNon linearityT MIN≤TA≤T MAX±0.3˚CSensor GainT MIN≤TA≤T MAX+10.0mV/˚CLoad RegulationT A=+25˚C±0.4mV/mALine RegulationT A=+25˚C±0.01mV/VQuiescent CurrentV S=+5V, +25˚C56µAChange of Quiescent Current4V≤VS≤30V0.2µATemperature Coefficient of Quiescent Current            -+0.39µA/˚CLong Term Stability T J=T MAX, for 1000 hours   ±0.08±0.08˚CLM35 EquivalentsLM35 Temperature Sensor Equivalent: LM34, DS18B20, DS1620, LM94022LM35 Working PrincipleTo understand the operation of the LM35 temperature sensor, we must first understand the linear scale factor. It is stated in the LM35 specifications to be +10 millivolts per degree centigrade. It means that for every 10 millivolt increase in output from the sensor vout pin, the temperature value increases by one. For example, if the sensor outputs 100 millivolts at the vout pin, the temperature in degrees Celsius will be 10 degrees Celsius. The negative temperature reading is the same. The temperature will be -10 degrees Celsius if the sensor outputs -100 millivolts.LM35 scale factorHow to use LM35 Temperature SensorLM35 is an Integrated Circuit Temperature Sensor whose output voltage varies depending on the temperature around it. It is a small and cheap IC that can be used to measure temperatures anywhere from-55°C to 150°C. It can be easily interfaced with any Microcontroller that has ADC function or any development platform like Arduino. Power the IC by applying a regulated voltage like +5V (VS) to the input pin and connecting the ground pin to the ground of the circuit. Now, you can measure the temperature in the form of a voltage as shown below.LM35 temperature measurement in form of voltage If the temperature is 0°C, the output voltage will also be 0V. There will be an increase of 0.01V (10mV) for each degree of temperature increase. The voltage can be converted to temperature using the formulas below.LM35 ApplicationsMeasuring temperature of a particular environmentProviding thermal shutdown for a circuit/componentMonitoring Battery TemperatureMeasuring Temperatures for HVAC applications.LM35 PackageConponent DatasheetLM35 Temperature Sensor DatasheetFAQWhat is LM35?The LM35 series are precision integrated-circuit temperature devices with an output voltage linearly-proportional to the Centigrade temperature. ... The low-output impedance, linear output, and precise inherent calibration of the LM35 device makes interfacing to readout or control circuitry especially easy.How does LM35 temperatrure sensor work?The LM35 is an integrated circuit sensor that can be used to measure temperature with an electrical output proportional to the temperature (in °C). It can measure temperature more accurately than a using a thermistor. ... The LM35 has an output voltage that is proportional to the Celsius temperature. What is the output of lm35?LM35 is a temperature measuring device having an analog output voltage proportional to the temperature. It provides output voltage in Centigrade (Celsius). It does not require any external calibration circuitry. The sensitivity of LM35 is 10 mV/degree Celsius.How accurate is lm35?LM35 can measure from -55 degrees centigrade to 150-degree centigrade. The accuracy level is very high if operated at optimal temperature and humidity levels. The conversion of the output voltage to centigrade is also easy and straight forward. ​The input voltage to LM35 can be from +4 volts to 30 volts.Can lm35 measure body temperature?LM35 is used for the sense body temperature. ... This device will allow one to measure their mean arterial pressure (MAP) in about one minute and the accurate body temperature will be displayed on the Android.How do I calibrate my lm35 temperature sensor?Make sure the instrument is connected in PSTrace. Click the 'Calibrate' button in the Settings window. The LM35 gives a voltage of 10 mV per measured centigrade. Calibration can be done by setting two points to determine both offset and slope of the linear relation or by just adjusting the offset.How do I connect my lm35?Connect LM35 to Arduino uno as shown in circuit diagram. The +5v for LM35 can be taken from the +5v out pin of arduino uno. Also the ground pin of LM35 can be connected to GND pin of arduino uno. Connect Vout (the analog out of LM35) to any of the analog input pin of arduino uno. 

The CD4066 is a quad bilateral switch which can be applied for switching of analog signals and digital signals. It is pin-for-pin compatible with the CD4016B device, but exhibits a much lower on-state resistance. In addition, the on-state resistance is relatively constant over the full signal-input range.CatalogCD4066 PinoutCD4066 FeaturesCD4066 ApplicationsCD4066 ParametersCD4066 Electrical CharacteristicsCD4066 CircuitCD4066 Functional Block DiagramCD4066 PackageWhere to use CD4066B ICCD4066 Product ComplianceCD4066 ManufacturerComponent DatasheetFAQCD4066 PinoutThe pin functions of CD4066 are shown in the table below. There are four independent analog switches in each package. Each analog switch has three terminals: input, output and control. The input and output terminals are interchangeable. When the control terminal is applied with high power level, the switch is on. When the control terminal is added with low power level, the switch is closed.Pin NumberPin NameDescription1IN/OUTSignal IN/OUT A2OUT/INSignal OUT/IN A3OUT/INSignal OUT/IN B4IN/OUTSignal IN/OUT B5CONTROL BCONTROL B6CONTROL CCONTROL C7VSSGround8IN/OUTSignal IN/OUT C9OUT/INSignal OUT/IN C10OUT/INSignal OUT/IN D11IN/OUTSignal IN/OUT D12CONTROL DCONTROL D13CONTROL ACONTROL A14VDDPower supplyCD4066 FeaturesQuad Bilateral Switch for MultiplexingVery Low Internal ResistanceOperating Voltage: 3V to 18VSwitching Voltage: 20V (maximum)On-state Resistance: 5Ω (at 15V Vcc and 10kΩ Load)Output current High: -0.4mALow Level Control pin Voltage: 0.9V (max)High Level Control pin Voltage: 11V (min @ 15V Vcc)Available in 14-pin PDIP, GDIP, PDSO packagesCD4066 ApplicationsAnalog Signal Switching and Multiplexing: Signal Gating, Modulators, Squelch Controls, Demodulators, Choppers, Commutating SwitchesDigital Signal Switching and MultiplexingTransmission-Gate Logic ImplementationAnalog-to-Digital and Digital-to-Analog ConversionsDigital Control of Frequency, Impedance, Phase, and Analog-Signal GainBuilding AutomationCD4066 ParametersBrand NameTexas InstrumentsConfiguration1:1 SPSTNumber of channels (#)4Power supply voltage - single (V)3.3, 5, 12, 16, 20Ron (Typ) (Ohms)125Bandwidth (MHz)40Operating temperature range (C)-55 to 125Input/output continuous current (Max) (mA)10RatingCatalogCON (Typ) (pF)8Supply current (Typ) (uA)0.01CD4066 Electrical CharacteristicsDC Electrical Characteristics (TA=+25°C, VSS=0V unless otherwise specified.)AC Electrical Characteristics (TA=25°C, tR=tF=20nS and VSS=0V, unless otherwise specified)CD4066 CircuitCD4066 Circuit DiagramBidirectional Signal Transmission Through Digital Control LogicCD4066 Functional Block Diagram CD4066 PackagePDIP (N)SOIC (D)SOP (NS)TSSOP (PW)Where to use CD4066B ICThe CD4066 is a bi-directional analog switching IC similar to CD4016, it is commonly used in multiplexing applications; it can also be used to isolate signals. The switch is bilateral and hence can be used for both digital and analog signals. The IC can operate from 3V to 18V, but commonly operated at 5V, 10Vor 15V nominal voltages. It can switch voltages upto 20V (peak).CD4066 Product ComplianceECCNEAR99USHTS8542390001CD4066 ManufacturerTexas Instruments Inc. (TI)  is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. Its headquarters are in Dallas, Texas, United States. TI is one of the top ten semiconductor companies worldwide, based on sales volume. Texas Instruments's focus is on developing analog chips and embedded processors, which accounts for more than 80% of their revenue. TI also produces TI digital light processing (DLP) technology and education technology products including calculators, microcontrollers and multi-core processors. To date, TI has more than 43,000 patents worldwide.Component DatasheetCD4066 DatasheetFAQWhat is CD4066?The CD4066 is a Quad Bilateral Switch IC, that is, it has four switches which can be controlled individual using a control pin. These switches can conduct in both the directions making it bilateral, it is commonly used for multiplexing analog or digital signals.How to Use CD4066?The CD4066 IC consists of four switches. It can switch analog signals through digital control. An analog signal is applied at the input of the switch. If a HIGH or 1 value is fed into the control input, the analog signal will be passed from input to the output of a switch.How CD4066 Work?The 4066 really functions as an analog switch. The 4066 is an IC composed of switches which are designed to switch analog signals via digital control. ... The 4066 is a quad bilateral switch circuit, meaning that is composed of 4 switches. Each switch has a single input and a single output terminal.What Are the Applications of CD4066?The CD4066 is a bi-directional analog switching IC similar to CD4016, it is commonly used in multiplexing applications; it can also be used to isolate signals. The switch is bilateral and hence can be used for both digital and analog signals.What's the Difference between CD4016 and CD4066?The major difference between both is that CD4066 has very low internal resistance, according to the datasheet it can only 5Ω of on-state resistance as compared with 200Ω of CD4016 IC. 

 1N5956 is a 3W Zener diode with limits and excellent operating characteristics that reflect the superior capabilities of silicon- oxide passivated junctions. It is  in an axial-lead, transfer- molded plastic package that offers protection in all common environmental conditions. The video below shows how does a diode work.Catalog1N5956 Pin Configuration1N5956 Features1N5956 Machanical Characteristics1N5956 Marking Diagram1N5956 Package Outline1N5956 Functional Equivalents1N5956 ManufacturerComponent DatasheetOrdering & Quantity1N5956 Pin Configuration Pin No.Pin NameDescription1AnodeCurrent always enters through Anode2CathodeCurrent always exits through Cathode1N5956 FeaturesZener Voltage Range - 3.3 V to 200 V ESD Rating of Class 3 (>16 KV) per Human Body Model Surge Rating of 98 W @ 1 ms Maximum Limits Guaranteed on up to Six Electrical Parameters Package No Larger than the Conventional 1 W Package Pb- Free Packages are Available1N5956 Machanical CharacteristicsCASE: Void free, transfer- molded, thermosetting plasticFINISH: All external surfaces are corrosion resistant and leads are readily solderableMAXIMUM LEAD TEMPERATURE FOR SOLDERING PURPOSES: 260°C, 1/16² from the case for 10 secondsPOLARITY: Cathode indicated by polarity bandMOUNTING POSITION: Any1N5956 Marking Diagram1N5956 Package Outline 1N5956 Functional EquivalentsPart NumberDescriptionManufacturer1N5956BP-TPDIODESZener Diode, 200V V(Z), 5%, 1.5W, Silicon, Unidirectional, DO-41, ROHS COMPLIANT, PLASTIC PACKAGE-2Micro Commercial Components1N5956BRLDIODES200V, 1W, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, DO-41, PLASTIC, CASE 59-10, 2 PINRochester Electronics LLC1N5956BTRDIODESZener Diode, 200V V(Z), 5%, 1.5W, Silicon, Unidirectional, DO-41,Central Semiconductor Corp1N5956BGDIODESZener Diode, 200V V(Z), 5%, 1.5W, Silicon, Unidirectional, DO-204AL, HERMETIC SEALED, GLASS, DO-41, 2 PINMicrosemi Corporation1N5956BDIODESZener Diode, 200V V(Z), 5%, 1.5WJinan Gude Electronic Device Co Ltd1N5956DIODESZener Diode,Galaxy Semi-Conductor Co LtdMV1N5956BGDIODESZener Diode, 200V V(Z), 5%, 1.5W, Silicon, Unidirectional, DO-204AL, HERMETIC SEALED, GLASS, DO-41, 2 PINMicrosemi Corporation1N5956B-TRDIODESZener Diode, 200V V(Z), 5%, 1.5W, Silicon, Unidirectional, DO-41Microsemi Corporation1N3820BDIODESDiode Zener Single 5.6V 2% 1W 2-Pin DO-41New Jersey Semiconductor Products Inc1N6031BE3TRDIODESZener Diode, 200V V(Z), 5%, 0.48W, Silicon, Unidirectional, DO-204AH, HERMETIC SEALED, GLASS, DO-35, 2 PINMicrosemi Corporation 1N5956 ManufacturerON Semiconductor is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications.Component Datasheet1N5956 Datasheet

The LM2576 series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator. LM2576 series are capable of driving a 3A load with excellent line and load regulation. The regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator.CatalogLM2576 DescriptionLM2576 PinoutLM2576 FeaturesLM2576 ApplicationsLM2576 Circuit DiagramLM2576 Package LM2576 ParametersElectrical Characteristics: All Output Voltage VersionsLM2576 ManufacturerComponent DatasheetFAQOrdering & QuantityLM2576 DescriptionThe LM2576 series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator. Fixed versions are available with a 3.3V, 5V, or 12V fixed output. Adjustable versions have an output voltage range from 1.23V to 37V. Both versions are capable of driving a 3A load with excellent line and load regulation.These regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator.The LM2576 series offers a high efficiency replacement for popular three-terminal adjustable linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required.A standard series of inductors available from several different manufactures are ideal for use with the LM2576 series. This feature greatly simplifies the design of switch-mode power supplies.The feedback voltage is guaranteed to ±2% tolerance for adjustable versions, and the output voltage is guaranteed to ±3% for fixed versions, within specified input voltages and output load conditions. The oscillator frequency is guaranteed to ±10%. external shutdown is included, featuring less than 200μA standby current. The output switch includes cycle-by-cycle current limiting and thermal shutdown for full protection under fault conditions.LM2576 Pinout Pin Function Decription SymbolDescription1VINThis pin is the positive input supply for the LM2576 step-down switching regulator. In order to minimize voltage transients and to supply the switching currents needed by the regulator, a suitable input bypass capacitor must be present.2OutputThis is the emitter of the internal switch. The saturation voltage Vast of this output switch is typically 1.5 V. it should be kept in mind that the PCB area connected to this pin should be kept to a minimum in order to minimize coupling to sensitive circuitry.3GndCircuit ground pin. See the information about the printed circuit board layout.4FeedbackThis pin senses regualted output voltage to complete the feedback loop. Ths signal is divided by the internal resistor divider network R2, R1 and applied to the non-inverting input of the internal error amplifier. In the Adjustable version of the LM2576 switching regualtor this pin is the direct input pf the error amplifier and the resistor network R2, R1 is connected externally to allow programming of the output voltage.5ON/OFFIt allows the switching regulator circuit to be shut down using logic level signals, thus dropping the total input supply current to approximately 80 mA. The threshold voltage is typically 1.4 V. Applying a voltage above this value (up to+Vin) shuts the regulator off. If the voltage applied to this pin is lower than 1.4 V or if this pin is left open, the regualtor will be in the “on” condition.LM2576 Features3V, 5V, 12V, 15V, and adjustable output versionsAdjustable version output voltage range: 1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditionsSpecified 3A output currentWide input voltage range: 4 V to 40 VRequires only four external components52kHz Fixed-frequency internal oscillatorLow-power standby modeIQ typically < 200 μAHigh efficiencyUses readily available standard inductorsThermal shutdown and current limit protection100% electrical thermal limit burn-inLM2576 ApplicationsSimple high-efficiency step-down (buck) regulatorEfficient pre-regulator for linear regulatorsOn-card switching regulatorsPositive to negative converter (inverting Buck-Boost)Isolated Flyback Converter using minimum number of external componentsNegative Boost ConverterLM2576 Circuit DiagramLM2576 Package LM2576 ParametersVin (Min) (V)4Vin (Max) (V)40Vout (Min) (V)3.3Vout (Max) (V)37Iout (Max) (A)3Iq (Typ) (mA)5Switching frequency (Min) (kHz)42Switching frequency (Max) (kHz)63FeaturesEnable, Over Current ProtectionOperating temperature range (C)-40 to 125RatingCatalogApprox. price (US$)1ku | 1.05Regulated outputs (#)1Pin Number5Maximum current3AElectrical Characteristics: All Output Voltage Versions LM2576  ManufacturerTexas Instruments Inc. (TI)  is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. Its headquarters are in Dallas, Texas, United States. TI is one of the top ten semiconductor companies worldwide, based on sales volume. Texas Instruments's focus is on developing analog chips and embedded processors, which accounts for more than 80% of their revenue. TI also produces TI digital light processing (DLP) technology and education technology products including calculators, microcontrollers and multi-core processors. To date, TI has more than 43,000 patents worldwide.Component DatasheetLM2576 DatasheetFAQWhere is LM2576 used?LM2576 is usually used as a voltage stabilizing device when the input and output voltage difference is large and the output current is also large. Because it is a switching regulator, it has a higher conversion efficiency and low heat generation than a linear regulator.What’s the difference between LM2576T-ADJ and LM2576S-ADJ?LM2576T-ADJ is the package of TO-220, LM2576S-ADJ is the package of TO-263-5, there is no difference in their functions.What is the difference between LM2940 and LM2576? Which circuit are they applicable to?LM2940 is a low-dropout linear stabilized integrated circuit. The linear stabilized power supply is characterized by a relatively simple circuit, high precision, and small ripple coefficient. It is suitable for precision power supplies with high voltage requirements. The disadvantage is that the efficiency is very low and the output The current is relatively small (relative to the switching power supply)LM2576 is a switching power supply integrated circuit. Switching power supply, the circuit is more complicated, but the output current is large, the efficiency is high, the disadvantage is that the accuracy is lower and the ripple coefficient is larger.Why do switching power supply chips LM2576 and LM2596 have diodes, inductors and capacitors behind the output pins?The function of the diode and the inductance is that the output current can be continuous when the LM25XX is in the off state, and the function of the capacitor is to prevent the output voltage from sudden changes when the LM25XX is turned on and off. In fact, it is filtering.Why the higher the switching frequency of LM2576 and LM2596, the smaller the output inductance and capacitance value?Quite simply, the capacitive reactance of a capacitor decreases as the frequency increases, and the inductance of an inductor increases as the frequency increases. That is to say, the effect of using an inductance of 33uH in the case of 150Khz is basically the same as the effect of using an inductance of 100uH in the case of 52khz, and the principle of capacitance is the same. LM2596 is an upgraded version of LM2576. But LM2576 also has the advantage of less switching loss and less interference.