{"id":7812,"date":"2026-06-27T03:35:16","date_gmt":"2026-06-27T03:35:16","guid":{"rendered":"https:\/\/materialparts.com\/tps2557drbr-2\/"},"modified":"2026-06-27T03:35:16","modified_gmt":"2026-06-27T03:35:16","slug":"tps2557drbr-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/tps2557drbr-2\/","title":{"rendered":"TPS2557DRBR"},"content":{"rendered":"

Productos<\/h2>\n

The TPS2557DRBR is a precision adjustable current-limited power-distribution switch from Texas Instruments with 0.5A to 5A current limit range, 50 mOhm RDS(ON), and USB 2.0 compliance in an 8-pin VSSOP package.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Current Limit Range<\/td>\n0.5 A to 5 A (adjustable via external resistor)<\/td>\n<\/tr>\n
Current Limit Accuracy<\/td>\n\u00b16% at 2A setting<\/td>\n<\/tr>\n
RDS(ON)<\/td>\n50 mOhm typical<\/td>\n<\/tr>\n
Input Voltage Range<\/td>\n2.5 V to 6.5 V<\/td>\n<\/tr>\n
UVLO Threshold<\/td>\n2.2 V (falling)<\/td>\n<\/tr>\n
Enable Input<\/td>\nActive high, compatible with 1V logic<\/td>\n<\/tr>\n
Fault Reporting<\/td>\nOpen-drain FAULT output<\/td>\n<\/tr>\n
Thermal Shutdown<\/td>\nAuto-retry after thermal fault<\/td>\n<\/tr>\n
Reverse Current Blocking<\/td>\nYes (when disabled)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
Paquete<\/td>\nVSSOP-8 (3.0 x 3.0 mm)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Precision adjustable current limit: 0.5A to 5A<\/li>\n
  • Low 50 mOhm RDS(ON) MOSFET switch<\/li>\n
  • USB 2.0 compliant with 500 mA and 900 mA settings<\/li>\n
  • Auto-retry thermal shutdown protection<\/li>\n
  • Reverse current blocking when disabled<\/li>\n
  • Open-drain fault reporting output<\/li>\n
  • 1V logic-compatible enable input<\/li>\n
  • Undervoltage lockout (UVLO)<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • USB power distribution<\/li>\n
    • Hot-plug power supplies<\/li>\n
    • Laptop and notebook USB ports<\/li>\n
    • Industrial power distribution<\/li>\n
    • Battery-powered load switches<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS2557DRBR is a precision adjustable current-limited power-distribution switch from Texas Instruments with 0.5A to 5A current limit range, 50 mOhm RDS(ON), and USB 2.0 compliance in an 8-pin VSSOP package. Key Specifications Current Limit Range 0.5 A to 5 A (adjustable via external resistor) Current Limit Accuracy \u00b16% at 2A setting RDS(ON) […]<\/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":[36,13],"tags":[],"chip_brand":[138],"class_list":["post-7812","post","type-post","status-publish","format-standard","hentry","category-gate-driver-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Adjustable current-limited power switch, 0.5-5A, 50mOhm, USB compliant, VSSOP-8","date_code":"","package_case":"VSSOP-8 (3.0 x 3.0 mm, HRI package)","in_stock":10200,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps2557.pdf","price":"$0.72 @ 1ku","product_introduction":"The TPS2557DRBR is a precision adjustable current-limited power-distribution switch from Texas Instruments featuring an N-channel MOSFET with 50 mOhm on-resistance and programmable current limit from 0.5A to 5A via an external resistor. The device meets USB 2.0 current limit requirements and provides comprehensive protection including thermal shutdown with auto-retry, undervoltage lockout, and reverse current blocking when the switch is disabled. The open-drain FAULT output reports overcurrent and thermal fault conditions. The 1V logic-compatible enable input allows direct interface with low-voltage microcontrollers. The device operates from 2.5V to 6.5V in the compact VSSOP-8 package suitable for USB port protection and general power distribution applications.","working_principle":"The TPS2557 uses an N-channel MOSFET as the main pass element, driven by an internal charge pump that ensures the gate voltage is sufficient for low RDS(ON) even at the minimum 2.5V input. The current limit circuit senses the MOSFET current and compares it against a reference set by the external RILIM resistor. When the current exceeds the limit, the control loop reduces the gate drive to regulate the current at the set limit, rather than immediately shutting off. This provides a constant-current limiting behavior that allows the output to recover when the overload is removed. If the current-limit condition persists and causes excessive power dissipation, the thermal shutdown activates at approximately 140\u00b0C and the switch turns off. After the junction cools by approximately 20\u00b0C, the switch automatically retries, cycling on and off until the fault clears. The FAULT open-drain output pulls low during overcurrent and thermal fault conditions.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>\n
      1<\/td>OUT<\/td>Power<\/td>Switch output (connects to load)<\/td><\/tr>\n
      2<\/td>ILIM<\/td>Analog<\/td>Current limit set (connect resistor to GND)<\/td><\/tr>\n
      3<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>\n
      4<\/td>EN<\/td>Input<\/td>Enable (active high, 1V logic compatible)<\/td><\/tr>\n
      5<\/td>FAULT<\/td>Output<\/td>Fault indicator (open-drain, active low)<\/td><\/tr>\n
      6<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>\n
      7<\/td>IN<\/td>Power<\/td>Switch input (2.5-6.5V)<\/td><\/tr>\n
      8<\/td>OUT<\/td>Power<\/td>Switch output (connected to pin 1 internally)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • USB Port Protection:<\/strong> Adjustable 0.5-5A current limit meets USB 2.0 500mA\/900mA requirements with \u00b16% accuracy<\/li>\n
      • Hot-Plug Supplies:<\/strong> Current limiting and thermal shutdown protect against inrush current and short circuits during hot-plug events<\/li>\n
      • Laptop USB Ports:<\/strong> 50 mOhm RDS(ON) minimizes voltage drop; FAULT output enables port status reporting to host controller<\/li>\n
      • Industrial Distribution:<\/strong> Reverse current blocking prevents backfeed when a powered port is disabled or input voltage drops<\/li>\n
      • Battery Load Switches:<\/strong> 1V-compatible enable input and 2.5V minimum operation suit single-cell Li-Ion powered systems<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>\n
        TPS2556DRBR<\/td>TI<\/td>Fixed 1.1A current limit version<\/td><\/tr>\n
        TPS2552DRVR<\/td>TI<\/td>0.5-1.5A range, SOT-23-6, smaller<\/td><\/tr>\n
        TPS2549RTER<\/td>TI<\/td>USB charging port controller + switch<\/td><\/tr>\n
        FDC6327L<\/td>onsemi<\/td>Load switch, smaller current range<\/td><\/tr>\n
        AP2145SG-13<\/td>Diodes Inc<\/td>Adjustable current limit, SOT-23-6<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7812","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=7812"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7812\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=7812"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=7812"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=7812"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=7812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}