[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-672230-105":59,"doc-detail-672230-en":129},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":122,"head_meta":124,"extra_data":126,"updated_unix":128},105,"en","umw-lm317-adjustable-3-terminal-positive-voltage-regulator-description","UMW LM317 - Adjustable 3-Terminal Positive Voltage Regulator - Description","","UMW LM317 is a monolithic adjustable 3-terminal positive voltage regulator designed to deliver more than 1.5A of load current. The output voltage is adjustable from 1.2V to 37V and uses internal current limiting, thermal shut-down, and safe area compensation. Internal features include thermal overload protection and short-circuit current limiting, along with output transistor SOA compensation. The document provides absolute maximum ratings, electrical characteristics such as line/load regulation, reference voltage, noise, ripple rejection, stability, thermal resistance, typical application formula, package outlines, and ordering information.",{"@graph":69,"@context":121},[70,84,104],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/umw-lm317-adjustable-3-terminal-positive-voltage-regulator-description/672230/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":98,"encodingFormat":97,"isAccessibleForFree":99,"interactionStatistic":100},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/umw-lm317-adjustable-3-terminal-positive-voltage-regulator-description/672230.png","ImageObject",300,407,{"name":92,"@type":93},"AditGamingID","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-02",true,{"@type":101,"interactionType":102,"userInteractionCount":14},"InteractionCounter",{"@type":103},"ViewAction",{"@type":105,"mainEntity":106},"FAQPage",[107,113,117],{"name":108,"@type":109,"acceptedAnswer":110},"What output voltage range and load current does UMW LM317 support?","Question",{"text":111,"@type":112},"LM317 provides an adjustable positive output voltage from 1.2V to 37V and supports more than 1.5A load current.","Answer",{"name":114,"@type":109,"acceptedAnswer":115},"What internal protections are included in the LM317?",{"text":116,"@type":112},"The regulator includes internal current limiting, thermal shut-down, and safe area compensation, plus internal thermal overload protection and short-circuit current limiting.",{"name":118,"@type":109,"acceptedAnswer":119},"How is the LM317 output voltage typically set in the application circuit?",{"text":120,"@type":112},"The document states VO=1.25V(1+R2/R1)+Iadj*R2, and notes capacitor placement requirements for performance depending on distance to the power supply filter.","https://schema.org",{"og:url":83,"og:type":123,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":125,"canonical":83},"index,follow",{"doc_id":127,"site_id":62},672230,1793586998,{"code":4,"msg":5,"data":130},{"doc_id":127,"user_id":131,"nickname":92,"user_avatar":132,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":44,"language":138,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":139,"faqs":140,"seo_title":141,"seo_description":67,"update_tm":128,"read_time":142},962094249103,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","UMW LM317  \n1.Description  \nThis monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply more than 1.5A of load current with an output voltage adjustable over a 1.2 to 37V. It employs internal current limiting , thermal shut-down and safe area compensation.  \n2.Features  \n Internal thermal overload protection  \n Internal short circuit current limiting  \n Output transistor safe operating area compensation  \n3.Pinning information  \n ~~ ~~ SOT-223 TO-252-2L SOT-89-3L  \n4.Internal Block Digram  \nVadj  \nUTD Semiconductor Co., Limited  \n[www.umw-ic.com](www.umw-ic.com) Jan.2025 1 of 9  \n[www.umw-ic.com](www.umw-ic.com)  \nUMW LM317  \n5.Absolute Maximum Rating  \n\n| Parameter |  | Symbol | Value | Units |\n| --- | --- | --- | --- | --- |\n| Input-Output Voltage Differential |  | VI-VO | 40 | V |\n| Lead Temperature |  | TLEAD | 230 | °C |\n| Power Dissipation | TO-220 | PD | Internally limited | W |\n|  | TO-252 |  | 2 | W |\n|  | SOT-223 |  | 1 | W |\n| Junction Temperature Range |  | TJ | -40 to 125 | °C |\n| Storage Temperature Range |  | TSTG | -55 to 125 | °C |\n| Temperature Coefficient of Output Voltage |  | ΔVO/ΔT | ±0.02 | %/°C |\n\n2 of 9  \nUTD Semiconductor Co., Limited Jan.2025  \n[www.umw-ic.com](www.umw-ic.com)  \nUMW LM317  \n6. Electrical Characteristics  \n(VO-VI=5V, IO=0 .5A, 0°C≤TJ≤+125°C, IMAX=1 .5A, PDMAX=20W, unless otherwise specified)  \n\n| Parameter | Symbol | Conditions |  | Min | Typ | Max | Units |\n| --- | --- | --- | --- | --- | --- | --- | --- |\n| Line Regulation (note1) | Rline | TA=25°C, 3V≤VI-VO≤40V |  |  | 0.01 | 0.04 | %/V |\n|  |  | 3V≤VI-VO≤40V |  |  | 0.02 | 0.07 |  |\n| Load Regulation (note1) | Rload | TA=25°C, 10mA≤IO≤IMAX |  |  |  |  | mV |\n|  |  | VO\u003C5V |  |  | 18 | 25 |  |\n|  |  | VO≥5V |  |  | 0.4 | 0.5 |  |\n|  |  | 10mA≤IO≤IMAX |  |  |  |  | %VO |\n|  |  | VO\u003C5V |  |  | 40 | 70 |  |\n|  |  | VO≥5V |  |  | 0.8 | 1.5 |  |\n| Adjustable Pin Current | IADJ |  |  |  | 46 | 100 | µA |\n| Adjustable Pin Current Change | ΔIADJ | 3V≤VI-VO≤40V\u003Cbr>10mA≤IO≤IMAX, PD≤ PMAX |  |  | 2 | 5 |  |\n| Reference Voltage | VREF | 3V≤VIN-VO≤40V\u003Cbr>10mA≤IO≤IMAX, PD≤ PMAX |  | 1.2 | 1.25 | 1.3 | V |\n| Temperature Stability | STT |  |  |  | 0.7 |  | %/VO |\n| Minimum Load Current to Maintain\u003Cbr>Regulation | IL(MIN) | VI-VO=40V |  |  | 3.5 | 12 | mA |\n| Maximum Output Current | IO(MAX) | VI-VO≤15V, PD≤PMAX | TA=25°C | 1 | 2.2 |  | A |\n|  |  | VI-VO≤40V, PD≤PMAX |  |  | 0.3 |  |  |\n| RMS Noise,% of VOUT | eN | TA=25°C, 10Hz≤f≤10KHz |  |  | 0.003 | 0.01 | %/VO |\n| Ripple Rejection | RR | VO=10V, f=120Hz without CADJ |  | 66 | 60 |  | dB |\n|  |  | CADJ=10µF(note2) |  |  | 75 |  |  |\n| Long-Term Stability,TJ=THIGH | ST | TA=25°C for end point\u003Cbr>mesasurements, 1000HR |  |  | 0.3 | 1 | % |\n| Thermal Resistance Junction to case | RθJC |  |  |  | 25.2 |  | °C/W |\n\nNotes: 1. Load and line regulation are specified at constant junction temperature. Change in VD due to heating effects must betaken into account separately. Pulse testing with low duty is used. (PMAX=20W)  \n2.CADJ . when used, is connected between the adjustment pin and ground.  \nUTD Semiconductor Co., Limited  \nJan.2025 3 of 9  \n[www.umw-ic.com](www.umw-ic.com)  \nUMW LM317  \n7.Typical Application  \nOUTPUT  \nVO=1.25V(1+R2/R1)+Iadj R2  \nCi is required when regulator is located an appreciable distance from power supply filter.  \nCo is not needed for stability , however, it does improve transient response.  \nSince IADJ is controlled to less than 100µA, the error associated with this term is negligible in most applications  \n[www.umw-ic.com](www.umw-ic.com)  \nUMW LM317  \n8.1TO-220-3L Package Outline Dimensions  \nDIMENSIONS (mm are the original dimensions)  \n\n| Symbol | A | A1 | b | b1 | c | c1 | D | E | E1 | e | e1 | F | h |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| Min | 4.470 | 2.520 | 0.710 | 1.170 | 0.310 | 1.170 | 10 .010 | 8.500 | 12 .060 | 2 .540\u003Cbr>TYP | 4.980 | 2.590 | 0.000 |\n| Max | 4.670 ","cbCaiawy3WoXH1ja","https://ap.wps.com/l/cbCaiawy3WoXH1ja","pdf",237148,"English","# Description\n# Features\n# Pinning information\n# Absolute Maximum Rating\n# Electrical Characteristics\n# Typical Application\n# Package Outline Dimensions\n## TO-220-3L\n## SOT-223\n## TO-252\n# Ordering information\n# Disclaimer","[{\"question\":\"What output voltage range and load current does UMW LM317 support?\",\"answer\":\"LM317 provides an adjustable positive output voltage from 1.2V to 37V and supports more than 1.5A load current.\"},{\"question\":\"What internal protections are included in the LM317?\",\"answer\":\"The regulator includes internal current limiting, thermal shut-down, and safe area compensation, plus internal thermal overload protection and short-circuit current limiting.\"},{\"question\":\"How is the LM317 output voltage typically set in the application circuit?\",\"answer\":\"The document states VO=1.25V(1+R2/R1)+Iadj*R2, and notes capacitor placement requirements for performance depending on distance to the power supply filter.\"}]","UMW LM317 - Adjustable 3-Terminal Positive Voltage Regulator - Description | PDF",23]