{"id":6422,"date":"2026-06-16T03:14:33","date_gmt":"2026-06-16T03:14:33","guid":{"rendered":"https:\/\/materialparts.com\/ao3400a\/"},"modified":"2026-06-16T03:14:33","modified_gmt":"2026-06-16T03:14:33","slug":"ao3400a","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ao3400a\/","title":{"rendered":"AO3400A"},"content":{"rendered":"

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

The AO3400A from Alpha & Omega Semiconductor is a 30V N-channel MOSFET in a SOT-23 package. With an ultra-low RDS(on) of 26mOhm at VGS=4.5V and 5.8A continuous drain current, it is one of the most capable MOSFETs available in the tiny SOT-23 footprint, making it ideal for load switching and DC-DC conversion in space-constrained designs.<\/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
Drain-Source Voltage (VDSS)<\/td>\n30V<\/td>\n<\/tr>\n
Continuous Drain Current<\/td>\n5.8A (TA=25C)<\/td>\n<\/tr>\n
RDS(on) Max<\/td>\n26mOhm (VGS=4.5V, ID=5.8A)<\/td>\n<\/tr>\n
RDS(on) Max<\/td>\n33mOhm (VGS=2.5V)<\/td>\n<\/tr>\n
Gate Threshold Voltage<\/td>\n0.65V to 1.2V<\/td>\n<\/tr>\n
\u062a\u0628\u062f\u064a\u062f \u0627\u0644\u0637\u0627\u0642\u0629<\/td>\n1.4W (TA=25C)<\/td>\n<\/tr>\n
Total Gate Charge<\/td>\n9.5nC (typical)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-55C to +150C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOT-23<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Ultra-low RDS(on): 26mOhm at 4.5V<\/li>\n
  • Logic-level gate drive (2.5V)<\/li>\n
  • 5.8A in tiny SOT-23 package<\/li>\n
  • Low gate charge: 9.5nC<\/li>\n
  • ESD protected gate<\/li>\n
  • RoHS compliant<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Load switching in portable devices<\/li>\n
    • \u0645\u062d\u0648\u0644\u0627\u062a DC-DC<\/li>\n
    • Battery management<\/li>\n
    • Motor drive for small motors<\/li>\n
    • Power management in IoT<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AO3400A from Alpha & Omega Semiconductor is a 30V N-channel MOSFET in a SOT-23 package. With an ultra-low RDS(on) of 26mOhm at VGS=4.5V and 5.8A continuous drain current, it is one of the most capable MOSFETs available in the tiny SOT-23 footprint, making it ideal for load switching and DC-DC conversion in […]<\/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":[30,13],"tags":[],"chip_brand":[197],"class_list":["post-6422","post","type-post","status-publish","format-standard","hentry","category-ac-dc-converters","category-integrated-circuits-ics","chip_brand-aos"],"acf":{"brief_explanation":"30V N-CH MOSFET, 5.8A, 26mOhm RDS(on), logic-level, SOT-23","date_code":"","package_case":"SOT-23-3 (2.90 x 1.30 x 1.00 mm)","in_stock":100000,"datasheet":"https:\/\/aosmd.com\/res\/data_sheets\/AO3400A.pdf","price":"$0.04 @ 1ku","product_introduction":"The AO3400A from Alpha & Omega Semiconductor is a 30V N-channel enhancement-mode MOSFET in a SOT-23 package that delivers extraordinary performance for its tiny footprint. With RDS(on) of only 26mOhm at VGS=4.5V and 5.8A continuous drain current, it outperforms many larger MOSFETs while occupying minimal board space. The low 0.65-1.2V gate threshold enables direct drive from 2.5V or 3.3V logic, eliminating the need for gate driver circuitry. The 9.5nC total gate charge allows fast switching at high frequencies. This combination of low RDS(on), logic-level gate, and SOT-23 package makes the AO3400A the go-to MOSFET for load switches, DC-DC converters, and power management in smartphones, wearables, and IoT devices.","working_principle":"The AO3400A is an N-channel enhancement-mode MOSFET using trench technology. When VGS exceeds the threshold (0.65-1.2V), an inversion layer forms in the P-body under the gate oxide, creating a conductive N-channel between source and drain. At VGS=4.5V, the channel is fully enhanced with RDS(on) of only 26mOhm thanks to advanced trench cell design that maximizes channel density. The low gate charge of 9.5nC allows the gate capacitance to be charged\/discharged quickly, enabling switching at frequencies up to several MHz. The body diode (P-body to N-epi junction) provides a natural freewheeling path with typical forward voltage of 0.75V.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>Gate<\/td>Input<\/td>Gate; drive 2.5V-4.5V for low RDS(on)<\/td><\/tr>
      2<\/td>Source<\/td>Power<\/td>Source; connects to ground or load<\/td><\/tr>
      3<\/td>Drain<\/td>Power<\/td>Drain; connects to load or supply<\/td><\/tr><\/table>","application_scenarios":"
      • Load Switch in Portable Devices:<\/b> Controls power rails from 3.3V or 5V MCU GPIO with 26mOhm RDS(on) minimizing voltage drop and power loss at up to 5.8A in smartphones and wearables<\/li>
      • Synchronous Buck Converter:<\/b> Serves as the low-side switch in synchronous buck converters up to 5A with 9.5nC gate charge enabling >1MHz switching in tiny SOT-23 footprint<\/li>
      • Battery Protection:<\/b> Disconnects battery from load with logic-level gate drive and ultra-low RDS(on) preserving battery voltage in Li-ion protection circuits<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>VDSS<\/th>ID<\/th>RDS(on)<\/th>Key Difference<\/th><\/tr>
        SI2302DS<\/td>Vishay<\/td>20V<\/td>2.2A<\/td>65mOhm<\/td>Lower current, same package<\/td><\/tr>
        AO3401A<\/td>AOS<\/td>-30V<\/td>-4.3A<\/td>35mOhm<\/td>P-channel complement<\/td><\/tr>
        DMN2075U<\/td>Diodes<\/td>20V<\/td>6.4A<\/td>22mOhm<\/td>Similar spec, different vendor<\/td><\/tr>
        2N7002<\/td>Generic<\/td>60V<\/td>0.3A<\/td>2Ohm<\/td>Much higher RDS(on), higher V<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6422","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=6422"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6422\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6422"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6422"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6422"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6422"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}