{"id":7429,"date":"2026-06-24T05:11:04","date_gmt":"2026-06-24T05:11:04","guid":{"rendered":"https:\/\/materialparts.com\/tl431aidbzr-2\/"},"modified":"2026-06-24T05:11:04","modified_gmt":"2026-06-24T05:11:04","slug":"tl431aidbzr-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tl431aidbzr-2\/","title":{"rendered":"TL431AIDBZR"},"content":{"rendered":"

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

The TL431AIDBZR from Texas Instruments is a programmable shunt voltage reference with 2.495V internal reference, +\/-1% initial accuracy, and 1-100mA cathode current range in a SOT-23-3 package. The A-grade provides standard accuracy at the lowest cost.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
Reference Voltage<\/td>\n2.495 V (internal, programmable to 36V)<\/td>\n<\/tr>\n
Initial Accuracy<\/td>\n+\/-1% (A grade)<\/td>\n<\/tr>\n
Temperature Drift<\/td>\n14 mV max over -40 to +85\u00b0C<\/td>\n<\/tr>\n
Cathode Current Range<\/td>\n1 mA to 100 mA<\/td>\n<\/tr>\n
Reference Input Current<\/td>\n2 uA typical<\/td>\n<\/tr>\n
Dynamic Impedance<\/td>\n0.2 Ohm typical<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-3<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • A-grade TL431 with +\/-1% accuracy at lowest cost in SOT-23-3<\/li>\n
  • Programmable output from 2.495V to 36V with 0.2 Ohm dynamic impedance<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Cost-sensitive SMPS feedback and general-purpose voltage reference<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TL431AIDBZR from Texas Instruments is a programmable shunt voltage reference with 2.495V internal reference, +\/-1% initial accuracy, and 1-100mA cathode current range in a SOT-23-3 package. The A-grade provides standard accuracy at the lowest cost. Key Specifications Reference Voltage 2.495 V (internal, programmable to 36V) Initial Accuracy +\/-1% (A grade) Temperature Drift […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[138],"class_list":["post-7429","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"TL431 A-grade shunt Vref, +\/-1%, 2.495V, SOT-23-3","date_code":"","package_case":"SOT-23-3 (2.90 x 1.30 x 1.00 mm)","in_stock":22500,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tl431.pdf","price":"$0.18 @ 1ku","product_introduction":"The TL431AIDBZR from Texas Instruments is the A-grade (standard accuracy) version of the industry-standard TL431 programmable shunt voltage reference in a SOT-23-3 package. The A grade provides +\/-1% initial accuracy at 25\u00b0C, which is sufficient for the majority of SMPS feedback and voltage monitoring applications where the highest precision is not required. The device features the same 2.495V internal bandgap reference, programmable output from 2.495V to 36V using two external resistors, 0.2 Ohm dynamic impedance, and 1-100mA cathode current range as the higher-accuracy grades. The A grade is the most cost-effective option and is the highest-volume shipped version of the TL431 family. The I suffix indicates the industrial temperature range (-40\u00b0C to +85\u00b0C).","working_principle":"Identical to the TL431ACDBZR. The A grade provides +\/-1% initial accuracy (vs +\/-0.5% for AC\/BC\/CC grades) at a lower cost. All other operational characteristics are the same. See TL431ACDBZR entry for complete working principle.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>REF<\/td>Reference input (2.495V threshold)<\/td><\/tr>
      2<\/td>Anode<\/td>Ground<\/td><\/tr>
      3<\/td>Cathode<\/td>Output\/shunt (1-100mA)<\/td><\/tr><\/table>","application_scenarios":"
      • Cost-sensitive SMPS feedback and general-purpose voltage reference<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TL431ACDBZR<\/td>SOT-23-3<\/td>+\/-0.5%, higher precision<\/td><\/tr>
        onsemi<\/td>TL431AIDBZRG<\/td>SOT-23-3<\/td>Pin-compatible, same spec<\/td><\/tr>
        ST<\/td>TL431ACDBZR<\/td>SOT-23-3<\/td>ST brand, pin-compatible<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7429","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=7429"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7429\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7429"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}