{"id":5697,"date":"2026-06-11T04:12:45","date_gmt":"2026-06-11T04:12:45","guid":{"rendered":"https:\/\/materialparts.com\/lm2842xqmkx\/"},"modified":"2026-06-12T03:06:50","modified_gmt":"2026-06-12T03:06:50","slug":"lm2842xqmkx","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/lm2842xqmkx\/","title":{"rendered":"LM2842XQMKX"},"content":{"rendered":"

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

The LM2842XQMKX from TI is a 42V 0.5A SIMPLE SWITCHER step-down converter with 550kHz switching in SOT-23-6 for distributed power and industrial supplies.<\/p>\n

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\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOT-23-6 (2.9×1.6mm)<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • See datasheet for complete specifications<\/li>\n
  • Industry-standard package<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Industrial control<\/li>\n
    • Consumer electronics<\/li>\n
    • Communication equipment<\/li>\n
    • Power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM2842XQMKX from TI is a 42V 0.5A SIMPLE SWITCHER step-down converter with 550kHz switching in SOT-23-6 for distributed power and industrial supplies. Key Specifications Package SOT-23-6 (2.9×1.6mm) Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Power management<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-5697","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"42V 0.5A buck converter, 550kHz, SOT-23-6","date_code":"","package_case":"SOT-23-6 (2.9x1.6mm)","in_stock":11252,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm2842.pdf","price":"$0.80 @ 1ku","product_introduction":"The LM2842XQMKX from TI is a 42V 0.5A SIMPLE SWITCHER step-down converter with 550kHz switching in SOT-23-6 for distributed power and industrial supplies.","working_principle":"The LM2842XQMKX is a 42V 0.5A step-down DC-DC converter from Texas Instruments in SOT-23-6 with 550kHz switching frequency (X suffix). The internal N-channel MOSFET is rated for 0.5A peak current with a typical RDS(on) of 500mOhm. The converter uses peak current-mode control: the error amplifier compares the FB pin voltage to the 0.765V internal reference, and its output (COMP) sets the peak inductor current threshold. The internal slope compensation prevents sub-harmonic oscillation at duty cycles above 50%. The bootstrap capacitor on CB provides the gate drive voltage for the internal high-side N-channel MOSFET (VSW + 5V approximately). An external Schottky catch diode (recommended SS34 or similar) is required to provide a current path for the inductor during the off-time. The EN pin has an internal 800k-ohm pull-up resistor, so leaving it floating enables the device automatically. The maximum duty cycle is approximately 90%, allowing output voltages up to 0.9 x VIN. The input undervoltage lockout (UVLO) threshold is 3.9V (rising). The thermal shutdown activates at 165C with 15C hysteresis. The QMKX suffix specifies SOT-23-6, AEC-Q100 qualified, 550kHz switching frequency.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>CB<\/td>Output<\/td>Bootstrap capacitor (connect 0.1uF to SW for high-side gate drive)<\/td><\/tr>
      2<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      3<\/td>FB<\/td>Input<\/td>Feedback (set output via resistor divider, 0.765V reference)<\/td><\/tr>
      4<\/td>EN<\/td>Input<\/td>Enable (HIGH=ON, LOW=shutdown, internal pull-up)<\/td><\/tr>
      5<\/td>VIN<\/td>Power<\/td>Input supply (4.5-42V)<\/td><\/tr>
      6<\/td>SW<\/td>Output<\/td>Switch node (connects to inductor and catch diode)<\/td><\/tr><\/table>","application_scenarios":"
    • Industrial control<\/li>
    • Consumer electronics<\/li>
    • Communication equipment<\/li>
    • Power management<\/li>","alternative_models":"
      Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
      Texas Instruments<\/td>LM2842YQMKX<\/td>SOT-23-6<\/td>550kHz switching frequency version<\/td><\/tr>
      Texas Instruments<\/td>LM2841XQMKX<\/td>SOT-23-6<\/td>0.3A version, same pinout<\/td><\/tr>
      Monolithic Power<\/td>MP2459DN-LF-Z<\/td>SOT-23-6<\/td>55V 0.5A buck, 1.5MHz, similar<\/td><\/tr>
      Diodes Inc.<\/td>AP64150QFN-7<\/td>DFN-6<\/td>40V 0.5A buck, 1.2MHz<\/td><\/tr>
      Texas Instruments<\/td>LMR16006XDDCR<\/td>SOT-23-6<\/td>60V 600mA buck, 1.5MHz<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5697","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=5697"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5697\/revisions"}],"predecessor-version":[{"id":6049,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5697\/revisions\/6049"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=5697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=5697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=5697"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=5697"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}