{"id":5158,"date":"2026-06-09T09:04:40","date_gmt":"2026-06-09T09:04:40","guid":{"rendered":"https:\/\/materialparts.com\/lm317at-nopb\/"},"modified":"2026-06-09T09:04:40","modified_gmt":"2026-06-09T09:04:40","slug":"lm317at-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm317at-nopb\/","title":{"rendered":"LM317AT\/NOPB"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The LM317AT\/NOPB from Texas Instruments is an adjustable positive voltage regulator capable of supplying 1.5A over a 1.25V to 37V output range with excellent line and load regulation.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u5236\u9020\u5546<\/td>\n\u5fb7\u5dde\u4eea\u5668<\/td>\n<\/tr>\n
\u8f93\u51fa\u7c7b\u578b<\/td>\nAdjustable (1.25V to 37V)<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\nUp to 40V<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n1.5A<\/td>\n<\/tr>\n
Line Regulation<\/td>\n0.01%\/V typical<\/td>\n<\/tr>\n
Load Regulation<\/td>\n0.1% typical<\/td>\n<\/tr>\n
Ripple Rejection<\/td>\n80 dB<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n2.25V max @ 1.5A<\/td>\n<\/tr>\n
Reference Voltage<\/td>\n1.25V<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTO-220<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Output adjustable from 1.25V to 37V<\/li>\n
  • 1.5A output current<\/li>\n
  • Excellent line\/load regulation<\/li>\n
  • 80 dB ripple rejection<\/li>\n
  • Thermal overload protection<\/li>\n
  • Short-circuit current limiting<\/li>\n
  • Output transistor safe area protection<\/li>\n
  • Floating operation for high voltages<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Adjustable power supplies<\/li>\n
    • Battery chargers<\/li>\n
    • Current regulators<\/li>\n
    • On-card regulation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM317AT\/NOPB from Texas Instruments is an adjustable positive voltage regulator capable of supplying 1.5A over a 1.25V to 37V output range with excellent line and load regulation. Key Specifications Manufacturer Texas Instruments Output Type Adjustable (1.25V to 37V) Input Voltage Up to 40V Output Current 1.5A Line Regulation 0.01%\/V typical Load Regulation […]<\/p>\n","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":[138],"class_list":["post-5158","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"Adjustable LDO, 1.25-37V, 1.5A, TO-220, industry standard","date_code":"","package_case":"TO-220 (10.4 x 9.0 x 4.6 mm)","in_stock":6534,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm317a.pdf","price":"$1.20 @ 1ku","product_introduction":"The LM317AT\/NOPB from Texas Instruments is the industry-standard adjustable positive voltage regulator, capable of supplying 1.5A over an output range of 1.25V to 37V. The output is set by two external resistors. Built-in protections include thermal shutdown, short-circuit current limiting, and output transistor safe area compensation. The LM317A variant offers tighter reference voltage tolerance (1% vs 4%).","working_principle":"The LM317 maintains 1.25V between the output and adjustment pins. An external resistor divider sets the output: VOUT = 1.25V \u00d7 (1 + R2\/R1) + IADJ \u00d7 R2. The adjustment pin current (IADJ \u2248 50\u00b5A) is small and constant. Internal protection circuits limit current during short circuits and reduce output when junction temperature exceeds safe limits.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>ADJ<\/td>Adjustment terminal<\/td><\/tr>
      2<\/td>OUT<\/td>Regulated output<\/td><\/tr>
      3<\/td>IN<\/td>Unregulated input<\/td><\/tr><\/table>","application_scenarios":"
      • Adjustable bench power supplies<\/li>
      • Battery charging circuits<\/li>
      • Constant current regulators<\/li>
      • On-card voltage regulation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Notes<\/th><\/tr>
        TI<\/td>LM337T\/NOPB<\/td>Negative complement<\/td><\/tr>
        TI<\/td>LM317T\/NOPB<\/td>Standard grade version<\/td><\/tr>
        TI<\/td>LM117H\/NOPB<\/td>Metal can package<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5158","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=5158"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5158\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5158"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}