{"id":7427,"date":"2026-06-24T05:07:58","date_gmt":"2026-06-24T05:07:58","guid":{"rendered":"https:\/\/materialparts.com\/tl431bcdbzr\/"},"modified":"2026-06-24T05:07:58","modified_gmt":"2026-06-24T05:07:58","slug":"tl431bcdbzr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tl431bcdbzr\/","title":{"rendered":"TL431BCDBZR"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The TL431BCDBZR from Texas Instruments is a precision programmable shunt voltage reference with 2.495V internal reference, +\/-0.5% initial accuracy, and 11mV max drift over extended temperature range (-40 to +125\u00b0C) in a SOT-23-3 package.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/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
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +125 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOT-23-3<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • B-grade TL431 with +\/-0.5% accuracy and 11mV max drift in SOT-23-3<\/li>\n
  • Tighter temperature drift than A-grade for precision applications<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Precision SMPS feedback and voltage monitoring<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TL431BCDBZR from Texas Instruments is a precision programmable shunt voltage reference with 2.495V internal reference, +\/-0.5% initial accuracy, and 11mV max drift over extended temperature range (-40 to +125\u00b0C) 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 […]<\/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-7427","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":8500,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tl431.pdf","price":"$0.30 @ 1ku","product_introduction":"The TL431BCDBZR from Texas Instruments is the B-grade version of the TL431 precision programmable shunt voltage reference in a SOT-23-3 package. The B grade provides +\/-0.5% initial accuracy (same as the AC grade) with tighter temperature drift specification of 11mV maximum over the -40\u00b0C to +125\u00b0C range, compared to 14mV for the A grade. This makes the BC grade suitable for applications requiring more precise voltage regulation over the full industrial temperature range. The device operates identically to the standard TL431 with 2.495V internal reference, programmable output from 2.495V to 36V, 0.2 Ohm dynamic impedance, and 1-100mA cathode current range. The SOT-23-3 package is ideal for space-constrained SMPS feedback and voltage monitoring applications.","working_principle":"Identical to the TL431ACDBZR. The BC grade provides tighter temperature drift (11mV max vs 14mV for AC grade) through tighter screening of the bandgap reference temperature coefficient during manufacturing. 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":"
      • Precision SMPS feedback with tighter temp drift over -40 to +125\u00b0C<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TL431ACDBZR<\/td>SOT-23-3<\/td>Same, wider temp drift<\/td><\/tr>
        TI<\/td>TL431BIDBZR<\/td>SOT-23-3<\/td>+\/-0.5% at 25\u00b0C, B-grade<\/td><\/tr>
        onsemi<\/td>TL431BCDBZRG<\/td>SOT-23-3<\/td>Pin-compatible B-grade<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7427","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=7427"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7427\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=7427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=7427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=7427"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7427"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}