{"id":3684,"date":"2026-06-08T02:02:03","date_gmt":"2026-06-08T02:02:03","guid":{"rendered":"https:\/\/materialparts.com\/stmps2141str\/"},"modified":"2026-06-08T02:02:03","modified_gmt":"2026-06-08T02:02:03","slug":"stmps2141str","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/stmps2141str\/","title":{"rendered":"STMPS2141STR"},"content":{"rendered":"

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

The STMPS2141STR from STMicroelectronics is a 500mA single-channel high-side power switch with 90mOhm N-channel MOSFET, active-low enable, and comprehensive fault protection. Designed for USB and hot-plug applications in a SOT-23-5 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
Switch Type<\/td>\nHigh-side N-channel MOSFET<\/td>\n<\/tr>\n
Continuous Current<\/td>\n500mA<\/td>\n<\/tr>\n
RDS(ON)<\/td>\n90mOhm (typ)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2.7V to 5.5V<\/td>\n<\/tr>\n
Enable Logic<\/td>\nActive Low<\/td>\n<\/tr>\n
Current Limit<\/td>\n800mA<\/td>\n<\/tr>\n
Standby Current<\/td>\n12uA (max)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to 125 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 90mOhm low RDS(ON) MOSFET switch<\/li>\n
  • 500mA continuous output current with 800mA limit<\/li>\n
  • Thermal and short-circuit protection with fault flag<\/li>\n
  • Undervoltage lockout (UVLO)<\/li>\n
  • Reverse current protection<\/li>\n
  • UL recognized component<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • USB port power switching<\/li>\n
    • Hot-plug power distribution<\/li>\n
    • USB hub power management<\/li>\n
    • Capacitive load driving<\/li>\n
    • Notebook and desktop PC power<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The STMPS2141STR from STMicroelectronics is a 500mA single-channel high-side power switch with 90mOhm N-channel MOSFET, active-low enable, and comprehensive fault protection. Designed for USB and hot-plug applications in a SOT-23-5 package. Key Specifications Switch Type High-side N-channel MOSFET Continuous Current 500mA RDS(ON) 90mOhm (typ) Supply Voltage 2.7V to 5.5V Enable Logic Active Low […]<\/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":[36,13],"tags":[],"chip_brand":[142],"class_list":["post-3684","post","type-post","status-publish","format-standard","hentry","category-gate-driver-ics","category-integrated-circuits-ics","chip_brand-st"],"acf":{"brief_explanation":"500mA high-side power switch, 90mOhm, active-low enable, fault flag, SOT-23-5","date_code":"","package_case":"SOT-23-5 (3.0 x 1.75 x 1.3 mm)","in_stock":4392,"datasheet":"https:\/\/www.st.com\/resource\/en\/datasheet\/stmps2141.pdf","price":"$0.39 @ 1ku","product_introduction":"The STMPS2141STR from STMicroelectronics is an enhanced single-channel power distribution switch designed for applications where heavy capacitive loads and short circuits are likely to be encountered. The device incorporates a 90mOhm N-channel MOSFET high-side switch controlled by an active-low logic enable input. It supports continuous output current up to 500mA with a current limit of 800mA. When an overcurrent condition is detected, the device switches into a constant-current mode to protect the system. A fault flag output signals overcurrent conditions to the host controller. Additional protection features include undervoltage lockout (UVLO), thermal shutdown with automatic recovery, and reverse current blocking. The device is UL recognized (File E354278). The STMPS2141STR operates from 2.7V to 5.5V in a compact SOT-23-5 package rated for -40 to 125 C operation.","working_principle":"The STMPS2141STR operates as a high-side power switch with integrated protection. Key subsystems include: (1) N-Channel MOSFET Switch - the main switching element with 90mOhm on-resistance, controlled by the enable input via a charge pump gate driver; (2) Charge Pump - generates the gate voltage above the supply rail to fully enhance the N-channel MOSFET for low RDS(ON); (3) Current Limiting - monitors load current and transitions to constant-current mode when the threshold (800mA) is exceeded; (4) Thermal Protection - monitors junction temperature and shuts down the switch when exceeding safe limits, with automatic recovery upon cooling; (5) UVLO - ensures the switch remains off until the supply voltage is above the minimum operating threshold; (6) Fault Logic - drives an open-drain fault output when overcurrent or thermal conditions are detected.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      2<\/td>OUT<\/td>Output<\/td>Switch output to load<\/td><\/tr>
      3<\/td>EN<\/td>Input<\/td>Enable input (active low)<\/td><\/tr>
      4<\/td>FAULT<\/td>Output<\/td>Fault flag output (open drain)<\/td><\/tr>
      5<\/td>IN<\/td>Input<\/td>Power supply input<\/td><\/tr><\/table>","application_scenarios":"
      • USB port power switching and protection in computers and hubs<\/li>
      • Hot-plug and hot-swap power distribution<\/li>
      • Capacitive load switching with inrush current protection<\/li>
      • Notebook PC USB and peripheral power management<\/li>
      • Industrial power distribution with fault reporting<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Texas Instruments<\/td>TPS2041BDBVR<\/td>SOT-23-5<\/td>500mA, active low, similar<\/td><\/tr>
        ON Semiconductor<\/td>NCP380HSN05AAT1G<\/td>SOT-23-5<\/td>500mA, adjustable limit<\/td><\/tr>
        STMicroelectronics<\/td>STMPS2151STR<\/td>SOT-23-5<\/td>500mA, active high enable<\/td><\/tr>
        STMicroelectronics<\/td>STMPS2161STR<\/td>SOT-23-5<\/td>1A, active low enable<\/td><\/tr>
        Microchip<\/td>MIC20XX-0.5BML<\/td>SOT-23-5<\/td>500mA, low RDS(ON)<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3684","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=3684"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3684\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3684"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}