{"id":6611,"date":"2026-06-18T15:38:27","date_gmt":"2026-06-18T15:38:27","guid":{"rendered":"https:\/\/materialparts.com\/tl431aclp-2\/"},"modified":"2026-06-18T15:38:27","modified_gmt":"2026-06-18T15:38:27","slug":"tl431aclp-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/tl431aclp-2\/","title":{"rendered":"TL431ACLP"},"content":{"rendered":"

Productos<\/h2>\n

The TL431ACLP from Texas Instruments is a three-terminal adjustable precision shunt regulator. It provides a programmable output voltage between Vref (~2.495V) and 36V using two external resistors, with 1% initial accuracy (A grade). Packaged in a through-hole TO-92, it is widely used as a voltage reference, error amplifier in SMPS feedback loops, and as a precision Zener diode replacement.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Reference Voltage<\/td>\n2.495V (typical), \u00b11% (A grade)<\/td>\n<\/tr>\n
Adjustable Output Range<\/td>\nVref to 36V<\/td>\n<\/tr>\n
Cathode Current Range<\/td>\n1 mA to 100 mA<\/td>\n<\/tr>\n
Dynamic Output Impedance<\/td>\n0.2\u03a9 (typical)<\/td>\n<\/tr>\n
Temperature Drift<\/td>\n6 mV typical over temperature (C grade)<\/td>\n<\/tr>\n
Reference Input Current<\/td>\n1.5 \u00b5A (typical)<\/td>\n<\/tr>\n
Off-State Cathode Current<\/td>\n0.05 \u00b5A (typical)<\/td>\n<\/tr>\n
Max Cathode Voltage<\/td>\n37V<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n0\u00b0C to +70\u00b0C (C grade)<\/td>\n<\/tr>\n
Paquete<\/td>\nTO-92 (LP, 3-pin)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Precision 2.495V bandgap reference with 1% accuracy (A grade)<\/li>\n
  • Adjustable output from 2.5V to 36V via external resistor divider<\/li>\n
  • Low dynamic output impedance: 0.2\u03a9 typical<\/li>\n
  • Sharp turn-on characteristic for Zener diode replacement<\/li>\n
  • Sink current capability: 1 mA to 100 mA<\/li>\n
  • Three accuracy grades: 0.5% (B), 1% (A), 2% (standard)<\/li>\n
  • Industry-standard TO-92 3-pin package<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • SMPS feedback loop error amplifier with optocoupler<\/li>\n
    • Adjustable voltage reference and Zener replacement<\/li>\n
    • On-board voltage regulation and power supply control<\/li>\n
    • Battery charger voltage monitoring<\/li>\n
    • Current limit and constant-current sink circuits<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TL431ACLP from Texas Instruments is a three-terminal adjustable precision shunt regulator. It provides a programmable output voltage between Vref (~2.495V) and 36V using two external resistors, with 1% initial accuracy (A grade). Packaged in a through-hole TO-92, it is widely used as a voltage reference, error amplifier in SMPS feedback loops, and […]<\/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":[13,20],"tags":[],"chip_brand":[138],"class_list":["post-6611","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"Precision shunt regulator, 2.495V-36V adjustable, 1% accuracy, TO-92","date_code":"","package_case":"TO-92 (4.83\u00d73.43\u00d73.68 mm, through-hole)","in_stock":7680,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tl431.pdf","price":"$0.28 @ 1ku","product_introduction":"The TL431ACLP from Texas Instruments is a three-terminal adjustable precision shunt regulator with 1% initial reference accuracy (A grade). Its programmable output range from 2.495V to 36V and low 0.2\u03a9 dynamic output impedance make it an ideal replacement for Zener diodes in precision applications. Widely used as an error amplifier in SMPS feedback loops with optocouplers, it is one of the most popular voltage reference ICs in power supply design.","working_principle":"The TL431ACLP operates as a precision shunt regulator by comparing the voltage at the REF pin with an internal 2.495V bandgap reference. When the REF pin voltage exceeds the internal reference, the cathode-to-anode conduction increases, shunting more current to regulate the voltage. The output voltage is set by two external resistors: VOUT = VREF \u00d7 (1 + R1\/R2). The internal error amplifier drives a Darlington output stage that can sink up to 100 mA. The sharp turn-on characteristic makes it suitable for replacing Zener diodes with much better precision and lower dynamic impedance.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>REF<\/td>Input<\/td>Reference input (compares with internal 2.495V)<\/td><\/tr>\n
      2<\/td>Anode<\/td>Power<\/td>Anode (connect to ground\/lower rail)<\/td><\/tr>\n
      3<\/td>Cathode<\/td>Output<\/td>Cathode (shunt current output, regulated terminal)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • SMPS and AC-DC converter feedback loop with optocoupler isolation<\/li>\n
      • Precision adjustable voltage reference replacing Zener diodes<\/li>\n
      • On-board voltage regulation and power supply output control<\/li>\n
      • Battery charger voltage monitoring and charge termination<\/li>\n
      • Constant-current sink and current limit circuits<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        TI<\/td>TL431BCLP<\/td>TO-92<\/td>0.5% accuracy (B grade)<\/td><\/tr>\n
        TI<\/td>TL431CLP<\/td>TO-92<\/td>2% accuracy (standard grade), lower cost<\/td><\/tr>\n
        ON Semiconductor<\/td>KA431AZTA<\/td>TO-92<\/td>Direct equivalent, 1% accuracy<\/td><\/tr>\n
        STMicroelectronics<\/td>TS431ACILT<\/td>SOT-23-3<\/td>SMD version, 1% accuracy<\/td><\/tr>\n
        TI<\/td>TL431AIDBZR<\/td>SOT-23-3<\/td>SMD version, A grade<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6611","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=6611"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6611\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=6611"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=6611"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=6611"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=6611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}