{"id":10496,"date":"2026-07-20T04:24:27","date_gmt":"2026-07-20T04:24:27","guid":{"rendered":"https:\/\/ic-vendor.com\/ncp380lmuajaatbg\/"},"modified":"2026-07-20T04:24:27","modified_gmt":"2026-07-20T04:24:27","slug":"ncp380lmuajaatbg","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/ar\/ncp380lmuajaatbg\/","title":{"rendered":"NCP380LMUAJAATBG"},"content":{"rendered":"

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

The onsemi NCP380LMUAJAATBG is a high-side power distribution switch with adjustable current limiting, designed for USB and other hot-swap applications. Housed in a UDFN-6 package, it integrates a 70 m\u03a9 P-channel MOSFET with current limit, thermal shutdown, reverse voltage protection, and under-voltage lockout. The adjustable current limit range is 500 mA to 2.1 A via an external resistor, and the device supports IEC 61000-4-2 Level 4 ESD 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\n
Switch Type<\/td>\nHigh-Side Power Switch (P-MOSFET)<\/td>\n<\/tr>\n
\u0646\u0637\u0627\u0642 \u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n2.5 V to 5.5 V<\/td>\n<\/tr>\n
On-Resistance (Typ)<\/td>\n70 m\u03a9 (UDFN-6)<\/td>\n<\/tr>\n
Current Limit (Adjustable)<\/td>\n500 mA to 2.1 A (via RILIM)<\/td>\n<\/tr>\n
Maximum DC Current<\/td>\n2.1 A (UDFN-6)<\/td>\n<\/tr>\n
\u062a\u0645\u0643\u064a\u0646 \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\nActive High (EN)<\/td>\n<\/tr>\n
Fault Output<\/td>\nActive Low (FLAG, open drain)<\/td>\n<\/tr>\n
ESD Rating (IEC 61000-4-2)<\/td>\n15 kV Air, 8 kV Contact (Output)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40\u00b0C to +85\u00b0C (TA)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nUDFN-6 (2 x 2 mm)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 70 m\u03a9 low on-resistance P-channel MOSFET for minimal voltage drop<\/li>\n
  • Adjustable current limit from 500 mA to 2.1 A via external resistor<\/li>\n
  • Reverse voltage protection with internal comparator<\/li>\n
  • Thermal shutdown with auto-retry<\/li>\n
  • Under-voltage lockout (UVLO) ensures safe startup<\/li>\n
  • Built-in soft-start controls inrush current<\/li>\n
  • Soft turn-off minimizes voltage ringing during switching<\/li>\n
  • IEC 61000-4-2 Level 4 ESD protection (8 kV contact, 15 kV air)<\/li>\n
  • Fault flag output signals over-current, over-temperature, or reverse-voltage<\/li>\n
  • Pb-Free, RoHS compliant<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • USB port power distribution in laptops and TVs<\/li>\n
    • Hot-swap power supply sequencing<\/li>\n
    • Peripheral device power management<\/li>\n
    • Battery charger output protection<\/li>\n
    • General-purpose 5V\/3.3V power switching<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The onsemi NCP380LMUAJAATBG is a high-side power distribution switch with adjustable current limiting, designed for USB and other hot-swap applications. Housed in a UDFN-6 package, it integrates a 70 m\u03a9 P-channel MOSFET with current limit, thermal shutdown, reverse voltage protection, and under-voltage lockout. The adjustable current limit range is 500 mA to 2.1 […]<\/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":[1801],"chip_brand":[144],"class_list":["post-10496","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","tag-ncp380lmuajaatbg","chip_brand-on"],"acf":{"brief_explanation":"High-side power switch, 70m\u03a9, 2.5-5.5V, adj current limit 0.5-2.1A, reverse V prot, UDFN-6, USB","date_code":"","package_case":"UDFN-6 (2.0 x 2.0 x 0.55 mm, exposed pad)","in_stock":4532,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/NCP380-D.PDF","price":"$0.398 @ 3ku","product_introduction":"The onsemi NCP380LMUAJAATBG is a high-side power distribution switch designed for applications subject to heavy capacitive loads and short-circuit conditions, such as USB ports and hot-swap power supplies. The device integrates a 70 m\u03a9 P-channel MOSFET in a compact UDFN-6 package with exposed pad for excellent thermal performance. When the output load exceeds the current limit threshold or a short circuit occurs, the device switches to constant-current regulation mode, limiting the output current to the programmed level. The current limit threshold is adjustable from 500 mA to 2.1 A via an external resistor (RILIM). An internal reverse-voltage detection comparator disables the switch when the output voltage exceeds the input voltage, protecting the input supply. The FLAG output (active low, open drain) signals fault conditions including over-current, over-temperature, and reverse voltage. Built-in soft-start and soft turn-off features minimize inrush current and voltage ringing. The device supports IEC 61000-4-2 Level 4 ESD protection on the output.","working_principle":"The NCP380LMUAJAATBG operates as a high-side power switch using an internal P-channel MOSFET. When EN is driven high, the gate driver turns on the P-MOSFET, connecting VIN to VOUT through the 70 m\u03a9 on-resistance. The soft-start circuit gradually turns on the MOSFET to limit inrush current into capacitive loads. The current sense circuit monitors the load current \u2014 when it exceeds the programmed limit (set by RILIM), the device enters constant-current mode, regulating the MOSFET gate to maintain the current at the limit threshold. If the over-current condition persists and the junction temperature rises, the thermal shutdown circuit turns off the MOSFET at approximately 140\u00b0C. The reverse voltage comparator monitors VOUT vs VIN \u2014 if VOUT exceeds VIN by more than ~140 mV, the MOSFET is turned off to prevent current flowing back into the source. The FLAG output is asserted low during any fault condition. The UVLO circuit ensures the MOSFET remains off until VIN exceeds approximately 2.0V.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>OUT<\/td>Output<\/td>Power switch output \u2014 connect to load<\/td><\/tr>\n
      2<\/td>GND<\/td>Power<\/td>Ground reference<\/td><\/tr>\n
      3<\/td>FLAG<\/td>Output<\/td>Fault flag output (active low, open drain) \u2014 requires pull-up resistor<\/td><\/tr>\n
      4<\/td>IN<\/td>Power<\/td>Power switch input voltage (2.5V to 5.5V)<\/td><\/tr>\n
      5<\/td>EN<\/td>Input<\/td>Enable input \u2014 logic high turns on switch<\/td><\/tr>\n
      6<\/td>ILIM<\/td>Input<\/td>Current limit programming \u2014 connect RILIM to GND<\/td><\/tr>\n
      Pad<\/td>PAD1<\/td>Thermal<\/td>Exposed thermal pad \u2014 must be soldered to PCB ground plane<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • USB port power switching and protection in laptops, tablets, and TVs<\/li>\n
      • Hot-plug power supply management in server and telecom equipment<\/li>\n
      • Li-ion battery charger output short-circuit protection<\/li>\n
      • General-purpose 5V or 3.3V peripheral power distribution<\/li>\n
      • Automotive USB charger port protection (non-automotive grade)<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        onsemi<\/td>NCP380HSNAAATBG<\/td>TSOP-5<\/td>Fixed current limit, smaller form factor<\/td><\/tr>\n
        onsemi<\/td>NCP380LMUAJAATBG<\/td>UDFN-6<\/td>This part (adjustable, UDFN)<\/td><\/tr>\n
        Texas Instruments<\/td>TPS2552DRBT<\/td>SON-6<\/td>Similar USB power switch<\/td><\/tr>\n
        Maxim Integrated<\/td>MAX894LETA+<\/td>TDFN-6<\/td>Comparable adjustable current limit switch<\/td><\/tr>\n
        onsemi<\/td>NIS6201STDR2G<\/td>TSOP-5<\/td>Lower RDS(on) alternative, fixed limit<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/10496","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/comments?post=10496"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/10496\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/media?parent=10496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/categories?post=10496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/tags?post=10496"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=10496"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}