{"id":6296,"date":"2026-06-12T11:19:13","date_gmt":"2026-06-12T11:19:13","guid":{"rendered":"https:\/\/materialparts.com\/tps25921ad\/"},"modified":"2026-06-12T11:19:13","modified_gmt":"2026-06-12T11:19:13","slug":"tps25921ad","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tps25921ad\/","title":{"rendered":"TPS25921AD"},"content":{"rendered":"

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

The TPS25921AD from Texas Instruments is a 4.5V-60V, 5A programmable eFuse (electronic fuse) in an SOIC-8 package. It provides overcurrent, overvoltage, undervoltage, and reverse current protection with 50m\u03a9 on-resistance, ideal for hot-swap and power rail protection.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u8f93\u5165\u7535\u538b<\/td>\n4.5V – 60V<\/td>\n<\/tr>\n
Current Limit<\/td>\n0.5A – 5A (programmable)<\/td>\n<\/tr>\n
On-Resistance<\/td>\n50m\u03a9 (typ)<\/td>\n<\/tr>\n
Overvoltage Protection<\/td>\nProgrammable<\/td>\n<\/tr>\n
Undervoltage Lockout<\/td>\nProgrammable<\/td>\n<\/tr>\n
Thermal Shutdown<\/td>\nYes<\/td>\n<\/tr>\n
Reverse Current Blocking<\/td>\nYes<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8 (D suffix)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 4.5V-60V wide input range for industrial and automotive rails<\/li>\n
  • Programmable current limit from 0.5A to 5A<\/li>\n
  • 50m\u03a9 low on-resistance for minimal voltage drop<\/li>\n
  • Programmable overvoltage and undervoltage thresholds<\/li>\n
  • Reverse current blocking for output-to-input protection<\/li>\n
  • Adjustable slew rate for inrush current control<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Hot-swap and hot-plug power rail protection<\/li>\n
    • Industrial 24V\/48V bus protection<\/li>\n
    • Automotive ECU power supply protection<\/li>\n
    • Server and telecom board power isolation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS25921AD from Texas Instruments is a 4.5V-60V, 5A programmable eFuse (electronic fuse) in an SOIC-8 package. It provides overcurrent, overvoltage, undervoltage, and reverse current protection with 50m\u03a9 on-resistance, ideal for hot-swap and power rail protection. Key Specifications Input Voltage 4.5V – 60V Current Limit 0.5A – 5A (programmable) On-Resistance 50m\u03a9 (typ) Overvoltage […]<\/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":[13,29],"tags":[],"chip_brand":[138],"class_list":["post-6296","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"4.5-60V 5A programmable eFuse, 50m\u03a9 Ron, OV\/UV\/reverse current protection, SOIC-8","date_code":"","package_case":"SOIC-8 (4.9 x 3.9mm)","in_stock":4296,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps25921a.pdf","price":"$1.85 @1ku","product_introduction":"The TPS25921AD from Texas Instruments is a 4.5V-60V, 5A programmable eFuse designed for robust power rail protection in industrial and automotive applications. It integrates an N-channel MOSFET with 50m\u03a9 on-resistance and comprehensive protection features including programmable overcurrent, overvoltage, undervoltage, and reverse current blocking. The adjustable inrush current slew rate prevents voltage spikes during hot-swap events, while the fault output provides real-time status to the system controller.","working_principle":"The TPS25921AD uses an internal N-channel MOSFET as the pass element, controlled by a gate driver that regulates the MOSFET's on-state and slew rate. During startup, the gate voltage ramps slowly to control inrush current into downstream capacitors (adjustable slew rate). In normal operation, the MOSFET is fully enhanced with 50m\u03a9 on-resistance. The current sense amplifier monitors load current through an external sense resistor, tripping the MOSFET off when the programmed threshold is exceeded. The overvoltage comparator disables the MOSFET when VIN exceeds the programmed OVP threshold. Reverse current blocking uses a comparator to detect current flowing from OUT to IN and opens the MOSFET within microseconds.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>IN<\/td>Input supply (4.5-60V)<\/td><\/tr>
      2<\/td>UVLO<\/td>Undervoltage lockout programming<\/td><\/tr>
      3<\/td>OVP<\/td>Overvoltage protection programming<\/td><\/tr>
      4<\/td>ILIM<\/td>Current limit programming resistor<\/td><\/tr>
      5<\/td>\/FLT<\/td>Fault output (active low, open-drain)<\/td><\/tr>
      6<\/td>EN<\/td>Enable input (active high)<\/td><\/tr>
      7<\/td>OUT<\/td>Output (to load)<\/td><\/tr>
      8<\/td>GND<\/td>Ground<\/td><\/tr><\/table>","application_scenarios":"
      • 24V\/48V industrial bus hot-swap protection for I\/O modules<\/li>
      • Automotive ECU power supply overvoltage and overcurrent protection<\/li>
      • Server blade and line card hot-plug isolation<\/li>
      • Telecom -48V distribution fuse replacement<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Vin<\/th>Imax<\/th>Ron<\/th><\/tr>
        TPS25921L<\/td>TI<\/td>4.5-60V<\/td>5A<\/td>50m\u03a9<\/td><\/tr>
        TPS2595<\/td>TI<\/td>4.5-65V<\/td>5A<\/td>40m\u03a9<\/td><\/tr>
        LTC4365<\/td>ADI<\/td>2.5-34V<\/td>External<\/td>N\/A<\/td><\/tr>
        MAX14661<\/td>ADI<\/td>4.5-60V<\/td>5A<\/td>50m\u03a9<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6296","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=6296"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6296\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=6296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=6296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=6296"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=6296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}