The adjustment terminal of the regulator can be bypassed to achieve very high ripple. Lm338t datasheet823 pages ti1 5amp adjustable regulators. However, the value of r1 may be any value from 100. Nsc, alldatasheet, datasheet, datasheet search site for electronic components and. Lm338k datasheet, lm338k 5a adjustable positive voltage regulator datasheet, buy lm338k. The lm317 datasheet specifies that is an adjustable threeterminal positivevoltage regulator capable of supplying more than 1. Lm8 lm338 5amp adjustable regulators general description the lm8 series of adjustable 3terminal positive voltage regulators is capable of supplying in excess of 5a over a 1.
Regulator dc dc switching regulator integrated circuit ics stepdown buck no 1. Lm8 lm338 5amp adjustable regulators generaldescription the lm8 series of adjustable 3terminal positive voltage regulators is capable of supplying in excess of 5a over a 12v to 32v output range they are exceptionally easy to use and require only 2 resistors to set the output voltage careful circuit design has resulted in outstanding load and. The lm317 lm317t, and high current lm338 lm338t are voltage regulators which can take an input voltage of 340 volts dc, and output a fixed output voltage from 1. When external capacitors are used with a voltage regulator it may be necessary to use protection diodes to prevent the capacitors from discharging through low current points into the voltage regulator. Apr 14, 2017 the adjustable symmetrical power supply is suitable to be used in audio amplifiers, microphone amplifiers, opamp applications, impedance converters and other devices that require regulated positive and negative dc supply, since the output current is 1. Basically the main function of this ic is voltage control and can also be wired for controlling currents through some simple modifications. Lm317 lm338 lm350 voltage regulator calculator schematic. Threeterminal 5 a adjustable voltage regulators stmicroelectronics. Regulator with line resistance in output leadwith the to3 package, it is easy to minimize the resistance from the case to the set resistor, by using 2separate leads to the case. Refer to the maximum ratings table for safe operating area. The lm8 series of adjustable 3terminal positive voltage regulators is capable of supplying in excess of 5a over to 32v output range.
Lm8 and lm338 5amp adjustable regulators datasheet rev. Reuk lm317 lm338 voltage calculator below is our automated voltage calculator for the lm317 and lm338 regulators. Lm117 lm317a lm317 adjustable regulator datasheet pdf. The output voltage vout is dependent on external resistor values. The positive voltage is being handled by lm317 ic while the negative voltage is handled by lm337. Lm8, lm338 snvs771c may 1998revised december 2016 lm8 and lm338 5amp adjustable regulators 1 1 features. Lm338 pdf, lm338 description, lm338 datasheets, lm338 view. Lm8 and lm338 5amp adjustable regulators datasheet. Lm338k steelnopb texas instruments integrated circuits. Lm338 datasheet, lm338 datasheets, lm338 pdf, lm338 circuit.
Lm338k steelnopb linear voltage regulator ic 1 output 5a to32 from texas instruments. Jan, 2019 lmk datasheetpdf national semiconductor ti when external capacitors are used with a voltage regulator lm338, may be necessary to use protection diodes to prevent the capacitors from discharging through low current lm33k into the voltage regulator. It has many application circuits in its datasheet, but this ic is known for being used as a variable voltage regulator. It can be powered by a battery or other singlepolarity supply over a very wide voltage range. The circuit will serve as a voltage converter with an input voltage of 35 v to produce an output voltage of 1. The ic lm338 is an outstanding device which can be used for unlimited number of potential electronic circuit applications. From the datasheets i downloaded, here is some of the max values. The presented power supply is an application of the popular lm338 regulator ic, which housed practically all elements of the high voltage regulator lm338. The ic lm338 by texas instruments, is a versatile ic which can be wired in numerous different ways for obtaining high quality power supply circuit configurations. It can be considered as one half of lm324 quad opamp which contains four opamps with common power supply. I bread boarded the lm338 and all worked as per datasheet. With the to3 package, it is easy to minimize the resistance from the case to the set resistor, by using2 separate leads to the case.
All four comparators are installed in a single 14pin package. The lm338 has a protective structure in its structure that prevents overheating and damages the output transistor caused by a short circuit. Lm317 lm338 lm350 voltage regulator calculator and circuits. The ground of r2 can be returned near the ground of the load to provide remoteground sensing and improve load regulation. Lm358 is a dual opamp ic integrated with two opamps powered by a common power supply. Pricing and availability on millions of electronic components from digikey. Careful circuit design has resulted in outstanding.
Lm338k stmicroelectronics three terminal 5a adjustable. Adjustable symmetrical power supply with lm317 and lm337. It easy circuit and nice circuit, because use ic lm338 and ic 741. Ic lm338 application circuits homemade circuit projects. Lm338ksteel old version datasheet 5amp adjustable regulators. The nominal output voltage is selected by means of a resistive divider. Careful circuit design has resulted in outstanding load and line regulation, comparable to many commercial. Lm338k steel texas instruments integrated circuits ics. The lm317 lm338 lm350 series of voltage regulators can also be configured to regulate current in a circuit. The part numbers in the lm8 series which have a k suffix are packaged in a standard steel to3 package, while those with a t suffix are packaged in a to220 plastic package. Lm317 lm338 lm350 current regulator calculator and circuits. Compare pricing for stmicroelectronics lm338k across distributors and discover alternative parts, cad models, technical specifications, datasheets, and more on octopart.
The ic can easily supply well over 5a at an output voltage range between 1. Lm338k steel linear voltage regulator ic 1 output 5a to32 from texas instruments. This v5a power supply is based on the famous lm338 ic from the st microelectronics. Lm338k datasheet, lm338k pdf, lm338k data sheet, lm338k manual, lm338k pdf, lm338k, datenblatt, electronics lm338k, alldatasheet, free, datasheet, datasheets, data sheet, datas sheets, databook, free datasheet. Lm317 resistor and voltage calculator circuit digest. Lmk datasheetpdf national semiconductor ti when external capacitors are used with a voltage regulator lm338, may be necessary to use protection diodes to prevent the capacitors from discharging through low current lm33k into the voltage regulator.
Lm338k linear voltage regulator ic 1 output 5a to3 from stmicroelectronics. Stmicroelectronics threeterminal 5 a adjustable voltage regulators,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated. Device information1 part number package body size nom lm8 tocan 2 25. Lm339 semiconductor and integrated circuit devices. Pak packages intended for use as positive adjustable voltage regulators. The lm338 series are adjustable 3terminal negative voltage regulators capable of supplying in excess5aover a 1. Lm338 adjustable power supply circuit electronics projects. Lm8238lm338march 1993adjustable voltage regulatorsthreeterminal 5a. Lm317 is an adjustable voltage regulator which takes an input voltage of 3 40v dc and provides a fixed output voltage of 1. The lm8 is rated for 55c mar 14, 2019 because it is the adjustable three terminal positive voltage regulator.
The ca3140a and ca3140 bimos operational amplifiers feature gate protected mosfet pmos transistors in the. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. For information about current regulation with these integrated circuit ic. Here we use it to make an automatic 12v battery charger circuit. This kind of dc power supplies uses a pcb so you can use two case types for ic1, to220 or to3. For information about current regulation with these integrated circuit ic regulators see the lm317 lm338 lm350 current regulator calculator. Old version datasheet lm8 lm338 5amp adjustable regulators. The lm217, lm317 are monolithic integrated circuits in to220, to220fp and d. The response time specified is for a 100 mv input step with 5. An important notice at the end of this data sheet addresses availability, warranty, changes, use in safetycritical applications, intellectual property matters and other important disclaimers.
Now to make it act as a variable voltage regulator we have to set variable voltages at pin 1 which. The lm338 power supply input voltage is rectified with graetz b1 bridge diode and filtered through capacitors c1 4700uf and c3 100nf. Lm338t datasheet, lm338 5a adjustable positive voltage regulator datasheet, buy lm338t. That is why power supplies and voltage stabilizers are one of the most popular topics, enjoying uninterrupted interest. It requires two external resistors to adjust the output voltage. The output voltage from the lm317 and lm338 is set using two resistors r1 and r2 with their values chosen according to the following equation. Lm338 5a, 40v, lowiq, adjustable linear voltage regulator. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Threeterminal 5 a adjustable voltage regulators, lm338 datasheet, lm338 circuit, lm338 data sheet. Lm317 lm338 lm350 voltage regulator calculator and. The lm317 lm338 lm350 voltage regulators offer full overload protection. Aug 06, 2019 it has many application circuits in its datasheet, but this ic is known for being used as a variable voltage regulator.
Lm8 5 amp adjustable regulator 5a lm338 5 amp adjustable regulator lm338 ic lm338 100 lm338 to220 lm338 0 tj 125 lm338 3 1. The lm317 lm338 lm350 family of adjustable 3terminal positive voltage regulators can take a input of 3 to 40 volts dc and provide a regulated voltage over a 1. Lm8 lm338 5amp adjustable regulators datasheet catalog. Pricing and availability on millions of electronic components from digikey electronics. Although the surge is very short in duration, there is enough energy to damage parts of the regulator ic. Protection diodeswhen external capacitors are used with any ic regulator it is sometimes necessary to add protection diodes toprevent the capacitors from discharging through low current points into the regulator. Sep 23, 2019 the ic lm338 is an outstanding device which can be used for unlimited number of potential electronic circuit applications. The lm317 is an adjustable voltage regulator which can output a range of voltages 1. The following circuit examples simply depict few of the very interesting useful power supply circuits using this ic. Careful circuit design has resulted in outstanding load and line regulation comparable to many commercial power supplies. The lm338k are adjustable 3 terminal positive voltage regulators capable of supplying in excess of 5a over a 1.
The default input offset voltage is very low which is of magnitude. Simply enter your target output voltage vout and chosen value for r1 100 to ohms, click calculate, and the required value of r2 will be displayed. The heart of the circuit is a lm338k adjustable voltage regulator ic which is a good quality ic with many built in features like adjustable output, thermal regulation, current limit constant with temperature, short circuit protection etc. The lm8lm238lm338 are adjustable 3terminal positive voltage regulators. Lm8, lm338 snvs771c may 1998revised december 2016 lm8 and lm338 5amp adjustable regulators 1 1 features 1 specified 7a peak output current specified 5a output current adjustable output down to 1. Lm338 circuit 1,5v32v 3a s you know, every electronic circuit needs power. Lm317d lm317, ncv317 voltage regulator adjustable output, positive 1. The differential input voltage range can be equal to that of power supply voltage. Where greater output current is required, the lm350 series regulators are. Lm338 datasheet lm8 5 amp adjustable regulator, package. Dec 05, 2017 lm358 is a dual opamp ic integrated with two opamps powered by a common power supply.
Lm338 datasheet 5a positive adjustable voltage regulator digchip. Lm317 lm338 lm350 current regulator calculator and. Datasheet the ca3140a and ca3140 are integrated circuit operational amplifiers that combine the advantages of high voltage pmos transistors with high voltage bipolar transistors on a single monolithic chip. Stmicroelectronics, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Stmicroelectronics threeterminal 5 a adjustable voltage regulators,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. This is high current and adjustable volt 0 to 30v 20a. This ac to dc power supply can output 5a in continous operation and 12a peak current. Lm338 datasheet, lm338 pdf, lm338 data sheet, lm338 manual, lm338 pdf, lm338, datenblatt, electronics lm338, alldatasheet, free, datasheet, datasheets, data sheet. Lm317 is a positive voltage regulator with three different terminals adjust, vout and vin respectively. Lm8lm338 5amp adjustable regulators general description the lm8 series of adjustable 3terminal positive voltage regulators is capable of supplying in excess of 5a over a 1. We can set the output voltage with only two external resistors. Figure 2 shows the effect of resistance between theregulator and 140.
The regulation of this 12 volt power supply is made with tr1 multiturn. You probably know that lm317 ic is used as an adjustable voltage regulator, but did you know it. High power linear regulator battery chargers power driver constantcurrent. Lm338 datasheet, lm338 pdf, lm338 data sheet, datasheet, data sheet, pdf home all manufacturers by category part name, description or manufacturer contain. The output voltage vout is dependent on external resistor values r1 and r2, according to the following equation. The following circuits show some of the basic uses of the lm317 lm338 lm350 series of voltage regulators when configured as a current regulator or constant current source ccs. The ic has time dependent current limiting, thermal regulation and is available in 3 lead transistor package.
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