The nominal output voltage is selected by means of only a resistive divider. Lm317t stmicroelectronics datasheet and cad model download. Lm317 datasheet, pdf old version datasheet electronic manufacturer. Lm317lz datasheet, lm317lz pdf, lm317lz data sheet, lm317lz manual, lm317lz pdf, lm317lz, datenblatt, electronics lm317lz, alldatasheet, free, datasheet, datasheets. It can also provide float operation for high voltage application. The bay linear lm317 are monolithic integrated circuit in to 220, to252, sot223 and d2pak packages intended for use as positive adjustable voltage regulators. Control description the lm 117lm217 lm317 are monolithic integrated circuit in t 0 2 2 0 to. Application circuits using lm317 from national semiconductor. Adjustable lm317 voltage regulator circuit with working. Integrated circuit 3terminal adjustable positive voltage. These effects can be minimized by proper integrated circuit design and layout techniques. It employs internal current limiting, thermal shutdown, and safe area compensation.
Lm317t pin configuration transistor lm317t ic lm317 lm317 lm 317 pcb layout for lm317 adjustable lm317bt diodes in4001 symbol lm317t text. It was designed by robert c dobkin in 1976 while he worked at national semiconductor. Lm317hvt datasheet pdf,ic lm317hvt suppliers price buy. Internal short circuit current limiting protection. Lm317 find the pdf datasheet, specifications, oem and distributor information. The lm217, lm317 are monolithic integrated circuits in to220, to220fp and. Lm317 pdf, lm317 description, lm317 datasheets, lm317 view. It was designed by robert bob pease, who also worked for national semiconductor. Lm117, lm317n wide temperature threepin adjustable regulator 1 features 3 description the lm117 and lm317n series of adjustable 3pin 1 typ. So, lets look into how to use this ic as a variable voltage regulator.
This monolithic integrated circuit is an adjustable 3terminal positivevoltage regulator designed to supply more than 1. Recent listings manufacturer directory get instant. Lm337 is a negative supplement to lm317 which regulates voltages below the reference level the lm317 datasheet specifies an adjustable threeterminal positive voltage regulator capable of supplying more than 1. Nsc 3terminal adjustable regulator,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. The lm317 is a popular adjustable positive linear voltage regulator. Control description the lm 117lm217lm317 are monolithic integrated circuit in t 0 2 2 0 to 3 and d2pak. Lm317t stmicroelectronics linear voltage regulators 1. Pricing and availability on millions of electronic components from digikey.
The lm117217317 provides an internal reference voltage of 1. Lm317 3terminal adjustable regulator slvs044h september 1997 revised december 2001 post office box 655303 dallas, texas 75265 3 electrical characteristics over recommended ranges of operating virtual junction temperature. The lm337 is the negative complement to the lm317, which regulates voltages below a reference. This is used to set a constant current flow across an external resistor divider show below, giving an output voltage vo of. Ci is not required, but is recommended, particularly if the regulator is not in close. Lm317 linear integrated circuit 1 3terminal 1a positive adjustable voltage regulator description the contek lm317 is an adjustable 3terminal positive voltage regulator, designed to supply more than 1. Lm317t pin configuration transistor lm317t ic lm317 lm317 lm 317 pcb layout for lm317 adjustable lm317bt diodes in4001 symbol lm317t. Lm317t stmicroelectronics integrated circuits ics digikey. Rating symbol value unit power supply voltages vdc.
Lm117, lm317n wide temperature threepin adjustable. Lm317tg datasheet description,onsemion semiconductor lm317tg pdf,adjustable output, positive voltage regulator. Com datasheet search site for electronic components and semiconductors and other semiconductors. Ics included on the chip are current limit thermal overload. Included on the chip are current limit, thermal overload protection and safe area protection. Lm317 from stmicroelectronics, inc find the pdf datasheet, specifications and distributor information. Lm317d lm317, ncv317 voltage regulator adjustable output, positive. This reference voltage is converted to aprogramming current iprog by r1 see figure 17, and this datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. Lm317 datasheet pdf, lm317 data sheet, lm317, lm317. The lm317 ic helps in current limiting, thermal overload protection and safe operating area protection. Posted on february 6, 2016 february 7, 2016 by diode. Lm337 is a negative supplement to lm317 which regulates voltages below the reference level. This monolithic integrated circuit is an adjustable 3terminal positive voltage regulator designed to supply more than 1. Lm117, lm317n wide temperature threepin adjustable regulator.
Its an adjustable threeterminal voltage regulator ic, with a high output current value of 1. Apart from using as a variable voltage regulator, lm317 can also be used as a fixed. Stmicroelectronics, alldatasheet, datasheet, datasheet search site for electronic. The lm317 datasheet specifies that is an adjustable threeterminal positivevoltage regulator capable of supplying more than 1. The lm317 device is an adjustable threeterminal positivevoltage regulator. Lm317ln snvs775l march 2000revised january 2018 lm317ln wide vin 100ma adjustable voltage regulator 1 1 features. Lm 317 i datasheet, cross reference, circuit and application notes in pdf format. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Lm317 is a 3terminal regulator ic and it is very simple to use. Pricing and availability on millions of electronic components from digikey electronics. Lm317 variable switch mode power supply smps homemade. 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.
As said earlier the ic has 3 pins, in which the input voltage is supplied to pin3 vin. It has many application circuits in its datasheet, but this ic is known for being used as a variable voltage regulator. Compare pricing for stmicroelectronics lm317t across 42 distributors and discover alternative parts, cad models, technical specifications, datasheets, and more on octopart. The ic lm317 promises countless interesting and useful power enhancement circuits, applicable in numerous fields where well dimensioned power supplies become crucially important.
They are designed to supply up to 100 ma of load current with an output voltage adjustable over a 1. The lm317 regulator can provide excess output current and hence with this capacity, it is conceptually considered as an operational amplifier. Dec 27, 2017 lm317 is a 3terminal regulator ic and it is very simple to use. The lm317 is an adjustable threeterminal positivevoltage regulator capable of supplying. Lm317t on semiconductor datasheet and cad model download. When external capacitors are used with any ic regulator, it is sometimes. Some assorted useful lm317 application circuits from national semiconductor pdf datasheet has been discretely explained in this chapter through the relevant circuit illustrations. Ic lm317 datasheet, cross reference, circuit and application notes in pdf format.
Voltage regulator semiconductor and integrated circuit. Lmx17hv high voltage threeterminal adjustable regulator. The nominal output voltage is selected by means of a resistive divider. Needed if device is more than 6 inches from filter the end of the data sheet. Lm317a 1% accurate threeterminal adjustable regulator datasheet. Lm317 3terminal adjustable regulator datasheet rev. It employs internal current limiting, thermal shutdown. Adjustable voltage regulator, lm317k pdf download inchange semiconductor, lm317k datasheet pdf, pinouts, data sheet, equivalent, schematic, cross reference, obsolete, circuits electronic component search and free download site. Lm317ln wide vin 100ma adjustable voltage regulator. The lm317 provides an internal reference voltage of 1. The nominal output voltage is selected by means of only a resistive divider, making the device. The adjustment pin is the inverting input of the amplifier and to produce a stable reference voltage of 1.
Bay linear datasheet catalog for integrated circuits. Adjustable voltage regulator, lm317t pdf download inchange semiconductor, lm317t datasheet pdf, pinouts, data sheet, equivalent, schematic, cross reference, obsolete, circuits electronic component search and free download site. Lm317 3terminal adjustable regulator slvs044o september 1997 revised july 2003 2 post office box 655303 dallas, texas 75265 descriptionordering information continued in addition to having higher performance than fixed regulators, this device includes onchip current limiting. Moreover such topology also requires the input to be minimum 3v higher than the desired output, adding further restrictions to the given regulator configuration. Lm317a 1% accurate threeterminal adjustable regulator. Lm317 family options part datasheet temperature description product folder lm317n 0 c to 125 c 40v, 1. We all know that an lm317 ic is internally designed to work as a linear voltage regulator ic, which has a serious drawback of power dissipation through heating.
Lm317 datasheet, lm317 datasheets, lm317 pdf, lm317 circuit. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Pak packages intended for use as positive adjustable voltage regulators. Lm317d lm317, ncv317 voltage regulator adjustable output, positive 1. The h metal can, j ceramic, and k metal can packages from analog devices are now obsolete the lt117a series are 3terminal positive adjustable voltage regulators which offer improved performance over earlier devices. Lm317 3terminal posifive adjustable regulator features description output current in excess of 1. Ka317, lm317 3terminal positive adjustable regulator. The lm317 is a widely used adjustable positive linear voltage regulator. The lm217llm317l are monolithic integrated circuits in so8 and to92 packages intended for use as positive adjustable voltage regulators. The lm317 ic helps in current limiting, thermal overload protection and safe operating area. The lm217, lm317 are monolithic integrated circuits in to220, to220fp and d. Dram market conditions are not clear, the cash offer ddr2 512mb ett is still one u.
173 619 212 100 449 334 47 649 1414 354 287 14 1042 514 478 31 1230 564 740 1050 300 351 959 1223 231 776 553 498 235 403 8 619 1204 1239 433 903 238 838 645 269 844 1048 1053 1168 820 13