{"id":5650,"date":"2026-06-11T03:49:08","date_gmt":"2026-06-11T03:49:08","guid":{"rendered":"https:\/\/materialparts.com\/lm317mbdtg\/"},"modified":"2026-06-12T03:26:33","modified_gmt":"2026-06-12T03:26:33","slug":"lm317mbdtg","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/lm317mbdtg\/","title":{"rendered":"LM317MBDTG"},"content":{"rendered":"

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The LM317MBDTG from onsemi is a 1.5A adjustable positive voltage regulator with 1.25V to 37V output range in a surface-mount DPAK package.<\/p>\n

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\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nTO-252 (DPAK)<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • See datasheet for complete specifications<\/li>\n
  • Industry-standard package<\/li>\n<\/ul>\n

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      \n
    • Industrial control<\/li>\n
    • Consumer electronics<\/li>\n
    • Communication equipment<\/li>\n
    • Power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM317MBDTG from onsemi is a 1.5A adjustable positive voltage regulator with 1.25V to 37V output range in a surface-mount DPAK package. Key Specifications Package TO-252 (DPAK) Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Power management<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[144],"class_list":["post-5650","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-on"],"acf":{"brief_explanation":"1.5A adjustable positive LDO, 1.25-37V, DPAK","date_code":"","package_case":"TO-252 (DPAK)","in_stock":13211,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/LM317M-D.PDF","price":"$0.55 @ 1ku","product_introduction":"The LM317MBDTG from onsemi is a 1.5A adjustable positive voltage regulator with 1.25V to 37V output range in a surface-mount DPAK package.","working_principle":"The LM317MBDTG is a 500mA adjustable positive voltage regulator from onsemi in DPAK, part of the legendary LM317 family. The output voltage is set by two external resistors: VOUT = 1.25V x (1 + R2\/R1) + IADJ x R2, where R1 connects from VOUT to ADJ (typically 120 ohm) and R2 connects from ADJ to GND. The IADJ term (50uA typical) causes a small error at high output voltages, so for precision applications R2 should be kept below 5k-ohm. The 1.25V reference between VOUT and ADJ is maintained by an internal bandgap reference and error amplifier. The minimum load current is 3.5mA (ensured by the 120-ohm R1 drawing 10.4mA), and the dropout voltage is 3V at 500mA (VIN must be at least VOUT + 3V). The device includes current limiting at approximately 700mA, thermal shutdown at 165C, and safe operating area protection. The MBDTG suffix specifies 500mA rating, DPAK package. The DPAK (TO-252) package provides 75C\/W junction-to-ambient thermal resistance with minimal PCB copper, allowing 1W dissipation at 25C ambient. For higher dissipation, a copper pad under the tab reduces thermal resistance to 40C\/W. The device is extremely versatile: adding a bypass capacitor (10uF) across R2 improves ripple rejection from 65dB to 80dB. A protection diode from VOUT to VIN prevents reverse-bias damage when the input is shorted. The LM317 is one of the most widely used linear regulators since its introduction by National Semiconductor in 1976.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>ADJ<\/td>Input<\/td>Adjustment pin (sets output voltage via external resistor divider)<\/td><\/tr>
      2<\/td>VOUT<\/td>Output<\/td>Regulated output (1.25-37V adjustable)<\/td><\/tr>
      3<\/td>VIN<\/td>Input<\/td>Unregulated input (up to 40V, 3V above VOUT minimum)<\/td><\/tr><\/table>","application_scenarios":"
    • Industrial control<\/li>
    • Consumer electronics<\/li>
    • Communication equipment<\/li>
    • Power management<\/li>","alternative_models":"
      Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
      onsemi<\/td>LM317MBDTG<\/td>DPAK<\/td>Same device, onsemi brand<\/td><\/tr>
      Texas Instruments<\/td>LM317DCYR<\/td>SOT-223<\/td>Same function, 500mA, SOT-223<\/td><\/tr>
      STMicroelectronics<\/td>LM317BD2T-TR<\/td>DPAK<\/td>Same function, ST brand<\/td><\/tr>
      onsemi<\/td>LM317T<\/td>TO-220<\/td>1.5A version, through-hole<\/td><\/tr>
      Microchip<\/td>MCP1827-ADJE\/AB<\/td>SOT-223<\/td>1.5A LDO, adjustable, low dropout<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=5650"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5650\/revisions"}],"predecessor-version":[{"id":6096,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5650\/revisions\/6096"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=5650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=5650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=5650"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=5650"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}