{"id":7144,"date":"2026-06-23T04:06:04","date_gmt":"2026-06-23T04:06:04","guid":{"rendered":"https:\/\/materialparts.com\/tps2051bdgnr\/"},"modified":"2026-06-23T04:06:04","modified_gmt":"2026-06-23T04:06:04","slug":"tps2051bdgnr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tps2051bdgnr\/","title":{"rendered":"TPS2051BDGNR"},"content":{"rendered":"

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

The TPS2051BDGNR from Texas Instruments is a current-limited power-distribution switch in MSOP-8 with active-high enable and 0.5A continuous current. Operating from 2.7V to 5.5V, it provides short-circuit and thermal protection for USB and general-purpose load switching.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n
\u8f93\u5165\u7535\u538b<\/td>\n2.7 V to 5.5 V<\/td>\n<\/tr>\n
Continuous Current<\/td>\n0.5 A<\/td>\n<\/tr>\n
RDS(on)<\/td>\n135 mOhm (max) at 5V<\/td>\n<\/tr>\n
Current Limit<\/td>\n0.9 A (typical)<\/td>\n<\/tr>\n
Enable<\/td>\nActive High<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +85C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 0.5A current-limited power switch with 135mOhm RDS(on)<\/li>\n
  • Active-high enable for direct MCU control<\/li>\n
  • Short-circuit and over-temperature protection<\/li>\n
  • Undervoltage lockout for safe startup<\/li>\n
  • Fault reporting via open-drain OC output<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • USB port power switching<\/li>\n
    • General-purpose load switching<\/li>\n
    • Hot-plug power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS2051BDGNR from Texas Instruments is a current-limited power-distribution switch in MSOP-8 with active-high enable and 0.5A continuous current. Operating from 2.7V to 5.5V, it provides short-circuit and thermal protection for USB and general-purpose load switching. Key Specifications Input Voltage 2.7 V to 5.5 V Continuous Current 0.5 A RDS(on) 135 mOhm (max) […]<\/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":[13,29],"tags":[],"chip_brand":[138],"class_list":["post-7144","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"0.5A power switch, active-high, 135mOhm, MSOP-8, USB\/load switching, fault report","date_code":"","package_case":"MSOP-8 \/ VSSOP-8 (3.00 x 3.00 x 0.95 mm)","in_stock":13117,"datasheet":"https:\/\/www.ti.com\/product\/TPS2051","price":"$0.48 @ 1ku","product_introduction":"The TPS2051BDGNR from Texas Instruments is a single-channel current-limited power-distribution switch in an MSOP-8 (DGN) package. The N-channel MOSFET switch has 135mOhm maximum on-resistance at 5V input and supports 0.5A continuous current with 0.9A typical current limit. The active-high enable allows direct MCU control. Protection features include short-circuit current limiting, over-temperature shutdown, and undervoltage lockout. An open-drain fault output (OC) reports overcurrent and thermal faults. The device operates from 2.7V to 5.5V, making it suitable for USB port power switching and general-purpose load management.","working_principle":"The TPS2051BDGNR uses an N-channel MOSFET power switch with integrated protection. (1) Power Switch: An N-channel MOSFET with 135mOhm RDS(on) connects the input (IN) to the output (OUT) when enabled. A charge pump generates the gate drive voltage above VIN for low RDS(on). (2) Current Limiting: When output current exceeds 0.9A typical, the current limit circuit reduces the gate drive to maintain constant current. (3) Thermal Shutdown: At approximately 140C junction temperature, the switch turns off. Auto-recovery occurs when temperature drops below threshold. (4) UVLO: The switch is off when VIN is below 2.0V. (5) Fault Output: Open-drain OC pulls low on overcurrent or thermal fault.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>OUT<\/td>Output<\/td>Switch output to load<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      3<\/td>OC<\/td>Output<\/td>Fault indicator (open-drain)<\/td><\/tr>
      4<\/td>EN<\/td>Input<\/td>Enable (active high)<\/td><\/tr>
      5-6<\/td>IN<\/td>Input<\/td>Power input (2.7-5.5V)<\/td><\/tr>
      7-8<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr><\/table>","application_scenarios":"
      • USB port power switching with 0.5A current limiting<\/li>
      • General-purpose load switching with active-high enable control<\/li>
      • Hot-plug power management with short-circuit and thermal protection<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TPS2051CDBVR<\/td>SOT-23-6<\/td>Same function, smaller package<\/td><\/tr>
        TI<\/td>TPS2041BDGNR<\/td>MSOP-8<\/td>Active-low enable version<\/td><\/tr>
        onsemi<\/td>NCP380LSNAJT1G<\/td>SOT-23-6<\/td>0.5A current-limited switch<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7144","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=7144"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7144\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7144"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}