{"id":2437,"date":"2026-05-20T03:57:32","date_gmt":"2026-05-20T03:57:32","guid":{"rendered":"https:\/\/materialparts.com\/tps2051bdgn\/"},"modified":"2026-05-20T03:57:32","modified_gmt":"2026-05-20T03:57:32","slug":"tps2051bdgn","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tps2051bdgn\/","title":{"rendered":"TPS2051BDGN"},"content":{"rendered":"

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

The TPS2051BDGN from Texas Instruments is a single-channel, current-limited power-distribution switch with an N-channel MOSFET output. It supports 2.7V to 5.5V load voltage, 500mA maximum output current, 70mohm on-resistance, and features current limiting, over-temperature, and UVLO protection in an 8-MSOP PowerPAD package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u5236\u9020\u5546<\/td>\n\u5fb7\u5dde\u4eea\u5668<\/td>\n<\/tr>\n
Switch Type<\/td>\nGeneral Purpose, High Side<\/td>\n<\/tr>\n
Number of Outputs<\/td>\n1<\/td>\n<\/tr>\n
Load Voltage<\/td>\n2.7V ~ 5.5V<\/td>\n<\/tr>\n
Max Output Current<\/td>\n500mA<\/td>\n<\/tr>\n
Rds On (typ)<\/td>\n70 mOhm<\/td>\n<\/tr>\n
Fault Protection<\/td>\nCurrent Limiting, OTP, UVLO<\/td>\n<\/tr>\n
\u8f93\u5165\u7c7b\u578b<\/td>\n\u975e\u9006\u53d8\u5f0f<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n8-MSOP PowerPAD (3 x 3mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C ~ 85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • High-side N-channel MOSFET power switch<\/li>\n
  • 500mA maximum continuous output current<\/li>\n
  • 70mohm typical on-resistance<\/li>\n
  • Fixed current limiting for fault protection<\/li>\n
  • Over-temperature shutdown protection<\/li>\n
  • Undervoltage lockout (UVLO)<\/li>\n
  • Status flag output for fault indication<\/li>\n
  • 8-MSOP PowerPAD for efficient thermal dissipation<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • USB power management and port protection<\/li>\n
    • Hot-plug power supply control<\/li>\n
    • Peripheral power switching in PCs<\/li>\n
    • Industrial load switching and protection<\/li>\n
    • Battery-powered system power routing<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS2051BDGN from Texas Instruments is a single-channel, current-limited power-distribution switch with an N-channel MOSFET output. It supports 2.7V to 5.5V load voltage, 500mA maximum output current, 70mohm on-resistance, and features current limiting, over-temperature, and UVLO protection in an 8-MSOP PowerPAD package. Key Specifications Manufacturer Texas Instruments Switch Type General Purpose, High Side […]<\/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-2437","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"500mA high-side power switch, 70mOhm Ron, 2.7V-5.5V, current limit\/OTP\/UVLO, MSOP-8 PowerPAD","date_code":"","package_case":"8-MSOP PowerPAD (3 x 3 mm)","in_stock":3120,"datasheet":"https:\/\/www.ti.com\/product\/TPS2051B","price":"$1.20 @ 1ku","product_introduction":"The Texas Instruments TPS2051BDGN is a single-channel current-limited power-distribution switch designed for applications requiring controlled power routing with robust fault protection. The device integrates an N-channel MOSFET with 70mohm typical on-resistance and supports load voltages from 2.7V to 5.5V with up to 500mA continuous current. Built-in current limiting, over-temperature shutdown, and undervoltage lockout protect both the switch and the downstream circuitry from fault conditions. A status flag output provides real-time fault indication to the system controller. The 8-MSOP PowerPAD package ensures efficient thermal management in space-constrained designs.","working_principle":"The TPS2051BDGN operates as a controlled high-side power switch with three main protection subsystems: 1) N-Channel MOSFET Switch: The integrated N-channel MOSFET connects the input supply to the load when enabled. The gate drive circuit ensures the MOSFET is fully enhanced for low 70mohm on-resistance. 2) Current Limiting: When the output current exceeds the fixed threshold (approximately 1A typical), the current-limiting circuit reduces the gate drive to limit the output current, protecting the switch and downstream components. 3) Thermal Protection: A thermal sensor monitors the junction temperature and shuts down the MOSFET if it exceeds approximately 140\u00b0C. The device automatically restarts when the temperature drops below the threshold. UVLO ensures the switch remains off until the input voltage is above the minimum operating level.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>IN<\/td>Power<\/td>Input supply voltage (2.7V-5.5V)<\/td><\/tr>
      2<\/td>IN<\/td>Power<\/td>Input supply voltage (connected internally)<\/td><\/tr>
      3<\/td>ON<\/td>Input<\/td>Active-high enable input (non-inverting)<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      5<\/td>FLG<\/td>Output<\/td>Fault status flag (active-low, open-drain)<\/td><\/tr>
      6<\/td>NC<\/td>-<\/td>No connection<\/td><\/tr>
      7<\/td>OUT<\/td>Output<\/td>Switched output to load<\/td><\/tr>
      8<\/td>OUT<\/td>Output<\/td>Switched output (connected internally)<\/td><\/tr>
      Pad<\/td>PowerPAD<\/td>Thermal<\/td>Thermal pad, connect to GND plane<\/td><\/tr><\/table>","application_scenarios":"
      • USB port power distribution and overcurrent protection in PCs and hubs<\/li>
      • Hot-plug power supply control in removable peripherals<\/li>
      • Industrial load switching with fault detection and reporting<\/li>
      • Battery-powered systems requiring controlled power routing<\/li>
      • General-purpose high-side power switching with protection<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TPS2052BDGN<\/td>8-MSOP<\/td>Dual channel version<\/td><\/tr>
        TI<\/td>TPS2041BDGN<\/td>8-MSOP<\/td>P-channel, 200mA, complementary<\/td><\/tr>
        Diodes Inc<\/td>AP2171MPG-13<\/td>MSOP-8<\/td>Similar function, 500mA<\/td><\/tr>
        TI<\/td>TPS22915BYFPR<\/td>DSBGA-4<\/td>2A load switch, smaller package<\/td><\/tr>
        onsemi<\/td>NCP380LSNAAT1G<\/td>DFN-8<\/td>Adjustable current limit<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2437","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=2437"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2437\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2437"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2437"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2437"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}