{"id":2497,"date":"2026-05-21T01:20:16","date_gmt":"2026-05-21T01:20:16","guid":{"rendered":"https:\/\/materialparts.com\/lmr34206fsc5rnxrq1\/"},"modified":"2026-05-21T01:20:16","modified_gmt":"2026-05-21T01:20:16","slug":"lmr34206fsc5rnxrq1","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lmr34206fsc5rnxrq1\/","title":{"rendered":"LMR34206FSC5RNXRQ1"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The LMR34206FSC5RNXRQ1 from Texas Instruments is an AEC-Q100 qualified 42V, 2A synchronous buck converter with 5V fixed output, 2.2MHz switching frequency, 18uA quiescent current, and integrated high-side and low-side MOSFETs in an SOT-563 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u5236\u9020\u5546<\/td>\n\u5fb7\u5dde\u4eea\u5668<\/td>\n<\/tr>\n
\u62d3\u6251\u7ed3\u6784<\/td>\nSynchronous Buck<\/td>\n<\/tr>\n
Output Voltage<\/td>\n5V (fixed)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n2A<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n3.8V to 42V<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n2.2MHz<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n18uA (sleep mode)<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n1.5uA<\/td>\n<\/tr>\n
\u8d44\u683c<\/td>\nAEC-Q100 Grade 1<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-563 (1.6 x 1.2mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +150C (TJ)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • AEC-Q100 Grade 1 qualified for automotive<\/li>\n
  • 42V maximum input with load dump protection<\/li>\n
  • 2A output with integrated high-side and low-side MOSFETs<\/li>\n
  • 5V fixed output voltage<\/li>\n
  • 2.2MHz switching frequency for small external components<\/li>\n
  • 18uA ultra-low quiescent current<\/li>\n
  • 1.5uA shutdown current<\/li>\n
  • Spread-spectrum modulation for EMI reduction<\/li>\n
  • Cycle-by-cycle current limit<\/li>\n
  • Thermal shutdown protection<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Automotive infotainment and ADAS power supplies<\/li>\n
    • Automotive body electronics<\/li>\n
    • Industrial 24V bus systems<\/li>\n
    • Battery-powered automotive applications<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LMR34206FSC5RNXRQ1 from Texas Instruments is an AEC-Q100 qualified 42V, 2A synchronous buck converter with 5V fixed output, 2.2MHz switching frequency, 18uA quiescent current, and integrated high-side and low-side MOSFETs in an SOT-563 package. Key Specifications Manufacturer Texas Instruments Topology Synchronous Buck Output Voltage 5V (fixed) Output Current 2A Input Voltage Range 3.8V […]<\/p>\n","protected":false},"author":2,"featured_media":2780,"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-2497","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"42V 2A sync buck, 5V fixed, 2.2MHz, 18uA Iq, AEC-Q100, SOT-563","date_code":"","package_case":"SOT-563 (1.6 x 1.2 x 0.55mm)","in_stock":6500,"datasheet":"https:\/\/www.ti.com\/product\/LMR34206FSC5RN-Q1","price":"$1.85 @ 1ku","product_introduction":"The Texas Instruments LMR34206FSC5RNXRQ1 is an AEC-Q100 Grade 1 qualified synchronous step-down converter designed for automotive applications. It integrates both high-side and low-side MOSFETs for high-efficiency synchronous rectification, delivering 2A output current from a 3.8V to 42V input range with fixed 5V output. The 2.2MHz switching frequency minimizes the size of external inductor and capacitors. The 18uA quiescent current in sleep mode preserves battery life in always-on automotive systems. The device features spread-spectrum modulation for reduced EMI, cycle-by-cycle current limiting, and thermal shutdown. The ultra-small SOT-563 package (1.6 x 1.2mm) enables compact power supply designs in space-constrained automotive modules.","working_principle":"The LMR34206FSC5RNXRQ1 operates as a synchronous buck converter with four key subsystems: 1) Synchronous Power Stage: The integrated high-side P-channel MOSFET and low-side N-channel MOSFET provide efficient power conversion. During on-time, the high-side switch conducts, storing energy in the inductor. During off-time, the low-side switch provides a low-resistance path for inductor current (synchronous rectification), eliminating diode conduction losses. 2) Control: Peak current-mode control with internal compensation maintains 5V output regulation. The 2.2MHz fixed frequency allows very small inductor values (1.5uH typical). 3) Spread Spectrum: A +-6% frequency dithering modulates the switching frequency, spreading EMI energy across a wider band to ease compliance with automotive EMC standards. 4) Protection: UVLO, thermal shutdown at 170C, and cycle-by-cycle current limiting provide comprehensive fault protection for automotive environments.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      2<\/td>VIN<\/td>Power<\/td>Input supply (3.8V to 42V)<\/td><\/tr>
      3<\/td>EN<\/td>Input<\/td>Enable (active high)<\/td><\/tr>
      4<\/td>FB<\/td>Input<\/td>Feedback (connect to output for 5V fixed)<\/td><\/tr>
      5<\/td>SW<\/td>Output<\/td>Switch output (connect to inductor)<\/td><\/tr>
      6<\/td>BOOT<\/td>Capacitor<\/td>Bootstrap capacitor for high-side driver<\/td><\/tr><\/table>","application_scenarios":"
      • 5V supply from 12V car battery in automotive ADAS modules<\/li>
      • 24V industrial bus to 5V conversion with automotive qualification<\/li>
      • Battery-powered automotive ECU with 18uA sleep current<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LMR34206FAE5RNQ1<\/td>SOT-563<\/td>3.3V output version<\/td><\/tr>
        TI<\/td>LM61460AASQRJRRQ1<\/td>VQFN-HR-12<\/td>36V, 6A automotive buck<\/td><\/tr>
        Infineon<\/td>TLE6368G2<\/td>PG-DSO-14<\/td>45V, 2A automotive buck<\/td><\/tr>
        ROHM<\/td>BD9S302MUF-CETL2<\/td>QFN-16<\/td>45V, 3A automotive buck<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=2497"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2497\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2780"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2497"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}