{"id":3230,"date":"2026-06-01T00:06:58","date_gmt":"2026-06-01T00:06:58","guid":{"rendered":"https:\/\/materialparts.com\/ap2171sg-13\/"},"modified":"2026-06-01T00:12:43","modified_gmt":"2026-06-01T00:12:43","slug":"ap2171sg-13","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ap2171sg-13\/","title":{"rendered":"AP2171SG-13"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The AP2171SG-13 from Diodes Incorporated is a single-channel load switch with adjustable current limit in a SOT-23-5 package. It features an input voltage range of 1.2 V to 5.5 V, a low 40 mOhm on-resistance, and programmable current limiting from 0.15 A to 2.0 A for USB and hot-swap power rail protection.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u0646\u0637\u0627\u0642 \u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n1.2 V to 5.5 V<\/td>\n<\/tr>\n
On-Resistance<\/td>\n40 mOhm typical<\/td>\n<\/tr>\n
Current Limit Range<\/td>\n0.15 A to 2.0 A (adjustable)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u0647\u062f\u0626\u0629<\/td>\n1 uA typical (off state)<\/td>\n<\/tr>\n
Reverse Current Blocking<\/td>\nYes<\/td>\n<\/tr>\n
Output Discharge<\/td>\nIntegrated<\/td>\n<\/tr>\n
\u062a\u0645\u0643\u064a\u0646 \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\nActive high<\/td>\n<\/tr>\n
Fault Flag Output<\/td>\nOpen-drain<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +85 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Low RDS(on) of 40 mOhm for minimal voltage drop<\/li>\n
  • Adjustable current limit via external resistor<\/li>\n
  • Reverse current blocking prevents backfeed<\/li>\n
  • Integrated output discharge for rapid power-down<\/li>\n
  • Thermal shutdown protection<\/li>\n
  • Open-drain fault flag indicates overcurrent or thermal events<\/li>\n
  • Controlled turn-on slew rate limits inrush current<\/li>\n
  • Compact SOT-23-5 package<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • USB port power switching and protection<\/li>\n
    • Hot-swap power rail management<\/li>\n
    • Portable device power distribution<\/li>\n
    • SSD and storage device power sequencing<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AP2171SG-13 from Diodes Incorporated is a single-channel load switch with adjustable current limit in a SOT-23-5 package. It features an input voltage range of 1.2 V to 5.5 V, a low 40 mOhm on-resistance, and programmable current limiting from 0.15 A to 2.0 A for USB and hot-swap power rail protection. Key […]<\/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":[199],"class_list":["post-3230","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-diodes"],"acf":{"brief_explanation":"Load switch, 1.2-5.5V, 40mOhm, adj current limit 0.15-2A, reverse block, SOT-23-5","date_code":"","package_case":"SOT-23-5 (2.90 x 1.60 x 1.10 mm)","in_stock":9800,"datasheet":"https:\/\/www.diodes.com\/assets\/Datasheets\/AP2171.pdf","price":"$0.25 @ 1ku","product_introduction":"The AP2171SG-13 from Diodes Incorporated is a single-channel integrated load switch designed for power rail switching and protection in portable electronics and USB-powered systems. It integrates a 40 mOhm N-channel MOSFET with adjustable current limiting, reverse current blocking, and controlled turn-on slew rate in a compact SOT-23-5 package. The current limit is programmable from 0.15 A to 2.0 A via a single external resistor, allowing designers to tailor the protection level for different load requirements. Reverse current blocking prevents backfeed from the output to the input when the switch is off, protecting upstream circuitry. The integrated output discharge resistor rapidly discharges the output capacitance when the switch is turned off, ensuring a clean power-down sequence. An open-drain fault flag (FLG) signals overcurrent, short-circuit, or thermal shutdown conditions to the system controller. The controlled turn-on slew rate limits inrush current during hot-plug events, preventing voltage droops on the input supply.","working_principle":"The AP2171SG-13 operates through four functional blocks: (1) The power switch is an N-channel MOSFET with 40 mOhm on-resistance, controlled by the EN (enable) input. When EN is driven high, the gate driver applies a controlled ramp to the MOSFET gate, producing a slew-rate-limited turn-on that limits inrush current into the output capacitance. When EN is driven low, the MOSFET turns off rapidly. (2) The current limit circuit monitors the MOSFET current and compares it against the threshold set by the external resistor on the ILIM pin. When the current exceeds the limit, the MOSFET gate voltage is reduced to regulate the current at the set value. If the overcurrent persists, the thermal shutdown activates. (3) The reverse current blocking circuit uses a comparator to detect when VOUT exceeds VIN, disabling the MOSFET to prevent current flow from output to input. (4) The fault flag (FLG) is an open-drain output that asserts low during overcurrent, short-circuit, or thermal shutdown events, providing real-time status to the host controller.","pin_description":"
      Pin No.<\/td>Pin Name<\/td>Function<\/td><\/tr>
      1<\/td>VIN<\/td>Input voltage (1.2-5.5 V)<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td><\/tr>
      3<\/td>EN<\/td>Enable input (active high)<\/td><\/tr>
      4<\/td>ILIM<\/td>Current limit set resistor (to GND)<\/td><\/tr>
      5<\/td>VOUT<\/td>Output voltage (to load)<\/td><\/tr><\/table>","application_scenarios":"
      • USB port power switching where the adjustable current limit protects the USB host controller from overcurrent faults and the reverse blocking prevents backfeed from peripheral devices<\/li>
      • Hot-swap power rail management in server and telecom cards where controlled turn-on slew rate limits inrush current during card insertion<\/li>
      • Portable device power distribution using multiple AP2171 devices to independently enable and protect individual power domains with fault reporting<\/li>
      • SSD power sequencing where the integrated output discharge ensures rapid and clean power-down during hot-unplug events<\/li><\/ul>","alternative_models":"
        Model<\/td>Brand<\/td>Ron<\/td>Ilim<\/td>Package<\/td><\/tr>
        AP2172SG-13<\/td>Diodes<\/td>40 mOhm<\/td>Fixed<\/td>SOT-23-5<\/td><\/tr>
        TPS22916DBVR<\/td>TI<\/td>50 mOhm<\/td>-<\/td>SOT-23-5<\/td><\/tr>
        NCP380LSN05AAT1G<\/td>onsemi<\/td>50 mOhm<\/td>Adj<\/td>TSOT-23-6<\/td><\/tr>
        FDC6324L<\/td>onsemi<\/td>Discrete<\/td>-<\/td>SOT-23-6<\/td><\/tr>
        SIP32431DR3-T1-GE3<\/td>Vishay<\/td>44 mOhm<\/td>-<\/td>TSOT-23-5<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=3230"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3230\/revisions"}],"predecessor-version":[{"id":3246,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3230\/revisions\/3246"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3230"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3230"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}