{"id":7430,"date":"2026-06-24T05:11:06","date_gmt":"2026-06-24T05:11:06","guid":{"rendered":"https:\/\/materialparts.com\/tl431bidbzr-2\/"},"modified":"2026-06-24T05:11:06","modified_gmt":"2026-06-24T05:11:06","slug":"tl431bidbzr-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tl431bidbzr-2\/","title":{"rendered":"TL431BIDBZR"},"content":{"rendered":"

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

The TL431BIDBZR from Texas Instruments is a precision programmable shunt voltage reference with 2.495V internal reference, +\/-0.5% initial accuracy, and 11mV max drift over industrial temperature range in a SOT-23-3 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\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+\/-0.5% (B grade)<\/td>\n<\/tr>\n
Temperature Drift<\/td>\n11 mV max over -40 to +125\u00b0C<\/td>\n<\/tr>\n
Cathode Current Range<\/td>\n1 mA to 100 mA<\/td>\n<\/tr>\n
Dynamic Impedance<\/td>\n0.2 Ohm typical<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-3<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • B-grade TL431 with +\/-0.5% accuracy and 11mV max drift in SOT-23-3<\/li>\n
  • Industrial temperature range (-40\u00b0C to +125\u00b0C) with tight drift spec<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Precision SMPS feedback over industrial temperature range<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TL431BIDBZR from Texas Instruments is a precision programmable shunt voltage reference with 2.495V internal reference, +\/-0.5% initial accuracy, and 11mV max drift over industrial temperature range in a SOT-23-3 package. Key Specifications Reference Voltage 2.495 V (internal, programmable to 36V) Initial Accuracy +\/-0.5% (B grade) Temperature Drift 11 mV max over -40 […]<\/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-7430","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"TL431 B-grade shunt Vref, +\/-0.5%, 11mV drift, SOT-23-3","date_code":"","package_case":"SOT-23-3 (2.90 x 1.30 x 1.00 mm)","in_stock":11800,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tl431.pdf","price":"$0.28 @ 1ku","product_introduction":"The TL431BIDBZR from Texas Instruments is the B-grade (precision) version of the TL431 programmable shunt voltage reference in a SOT-23-3 package. The B grade provides +\/-0.5% initial accuracy with 11mV maximum voltage drift over the full industrial temperature range (-40\u00b0C to +125\u00b0C), making it suitable for applications requiring tighter regulation over temperature than the standard A grade. The I suffix indicates the industrial temperature range. The device features the same 2.495V internal reference programmable to 36V, 0.2 Ohm dynamic impedance, and 1-100mA cathode current range as other TL431 grades. This is the preferred grade for industrial SMPS and power management applications where temperature stability is important.","working_principle":"Identical to the TL431ACDBZR. The B grade provides tighter initial accuracy (+\/-0.5% vs +\/-1% for A grade) and lower temperature drift (11mV vs 14mV max over -40 to +125\u00b0C). 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":"
      • Precision SMPS feedback over -40 to +125\u00b0C industrial range<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TL431BCDBZR<\/td>SOT-23-3<\/td>Same B-grade, C-temp option<\/td><\/tr>
        TI<\/td>TL431AIDBZR<\/td>SOT-23-3<\/td>A-grade, lower cost<\/td><\/tr>
        onsemi<\/td>TL431BIDBZRG<\/td>SOT-23-3<\/td>Pin-compatible B-grade<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7430","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=7430"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7430\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7430"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}