{"id":9971,"date":"2026-07-08T07:37:33","date_gmt":"2026-07-08T07:37:33","guid":{"rendered":"https:\/\/ic-vendor.com\/ifx91041ejvmakma1\/"},"modified":"2026-07-08T07:37:33","modified_gmt":"2026-07-08T07:37:33","slug":"ifx91041ejvmakma1","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/ifx91041ejvmakma1\/","title":{"rendered":"IFX91041EJVMAKMA1"},"content":{"rendered":"

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

The Infineon IFX91041EJVMAKMA1 is a 4.5V to 45V, 1.2A step-down (buck) DC-DC converter with integrated power MOSFET in a VQFN-12 (3x3mm) package. With programmable switching frequency (200kHz-2MHz) and spread-spectrum clocking for EMI reduction, it is designed for automotive and industrial power supply applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u62d3\u6251\u7ed3\u6784<\/td>\nSynchronous Step-Down (Buck)<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n4.5V to 45V<\/td>\n<\/tr>\n
Output Voltage<\/td>\n1.0V to 22V (adjustable)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n1.2A<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n200kHz to 2MHz (programmable)<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n30uA (typical, PFM mode)<\/td>\n<\/tr>\n
Spread Spectrum<\/td>\nYes (SSCG for EMI)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nVQFN-12 (3x3mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +150\u00b0C<\/td>\n<\/tr>\n
\u8d44\u683c<\/td>\nAEC-Q100<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 4.5V to 45V wide input range<\/li>\n
  • 1.2A output current<\/li>\n
  • Spread-spectrum clocking for EMI<\/li>\n
  • PFM mode for light-load efficiency<\/li>\n
  • 30uA quiescent current in PFM<\/li>\n
  • External sync and frequency dithering<\/li>\n
  • AEC-Q100 automotive qualified<\/li>\n
  • Compact 3x3mm VQFN package<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Automotive ECU point-of-load<\/li>\n
    • 12V\/24V battery system step-down<\/li>\n
    • Industrial 24V bus conversion<\/li>\n
    • Truck and bus power supplies<\/li>\n
    • Telecom 48V-to-logic conversion<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The Infineon IFX91041EJVMAKMA1 is a 4.5V to 45V, 1.2A step-down (buck) DC-DC converter with integrated power MOSFET in a VQFN-12 (3x3mm) package. With programmable switching frequency (200kHz-2MHz) and spread-spectrum clocking for EMI reduction, it is designed for automotive and industrial power supply applications. Key Specifications Topology Synchronous Step-Down (Buck) Input Voltage 4.5V to […]<\/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":[31,13],"tags":[1266],"chip_brand":[173],"class_list":["post-9971","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","tag-ifx91041ejvmakma1","chip_brand-infineon"],"acf":{"brief_explanation":"45V 1.2A sync buck, SSCG, PFM 30uA, VQFN-12 3x3mm, Infineon AEC-Q100","date_code":"","package_case":"VQFN-12 (3.0 x 3.0 x 0.65mm, exposed pad)","in_stock":13665,"datasheet":"https:\/\/www.infineon.com\/dgdl\/Infineon-IFX91041EV-DS-v01_02-EN.pdf","price":"$2.50 @ 1ku","product_introduction":"The Infineon IFX91041EJVMAKMA1 is a 45V 1.2A synchronous buck converter in a compact 3x3mm VQFN-12 package, AEC-Q100 qualified for automotive applications. The spread-spectrum clock generation (SSCG) reduces EMI peaks, simplifying EMC compliance. PFM mode with 30uA quiescent current maintains efficiency at light loads, critical for always-on automotive ECUs.","working_principle":"The IFX91041EJVMAKMA1 uses current-mode control with integrated N-channel MOSFETs for synchronous rectification. The 4.5V to 45V input range covers automotive 12V\/24V battery systems with full load-dump protection. The spread-spectrum clock generation (SSCG) modulates the switching frequency by \u00b16% around the center frequency, spreading EMI energy across a wider bandwidth and reducing peak emissions. The PFM (pulse frequency modulation) mode reduces switching frequency at light loads to maintain high efficiency while drawing only 30uA quiescent current. An external synchronization input allows frequency locking to a system clock.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>OUT<\/td>Power<\/td>Output (inductor connection)<\/td><\/tr>
      2<\/td>VIN<\/td>Input<\/td>Input supply (4.5-45V)<\/td><\/tr>
      3<\/td>EN\/UVLO<\/td>Input<\/td>Enable \/ undervoltage lockout<\/td><\/tr>
      4<\/td>SS<\/td>I\/O<\/td>Soft-start capacitor<\/td><\/tr>
      5<\/td>FSW<\/td>Input<\/td>Frequency programming resistor<\/td><\/tr>
      6<\/td>FB<\/td>Input<\/td>Feedback voltage (1.0V reference)<\/td><\/tr>
      7<\/td>COMP<\/td>I\/O<\/td>Error amplifier compensation<\/td><\/tr>
      8<\/td>SYNC<\/td>Input<\/td>External clock synchronization<\/td><\/tr>
      9<\/td>PG<\/td>Output<\/td>Power-good open-drain<\/td><\/tr>
      10<\/td>PFGND<\/td>Ground<\/td>Power ground<\/td><\/tr>
      11<\/td>OUT<\/td>Power<\/td>Output (inductor connection)<\/td><\/tr>
      12<\/td>SGND<\/td>Ground<\/td>Signal ground<\/td><\/tr><\/table>","application_scenarios":"
      • Automotive ECU 12V\/24V to 3.3V\/5V point-of-load<\/li>
      • Truck\/bus 24V system power conversion<\/li>
      • Industrial 24V bus step-down regulation<\/li>
      • Automotive infotainment system power supply<\/li>
      • Telecom -48V intermediate bus conversion<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM5161DDAR<\/td>SOP-8<\/td>65V 1A buck<\/td><\/tr>
        Monolithic Power<\/td>MP8759GD-Z<\/td>QFN-12<\/td>18V 9A, lower Vin<\/td><\/tr>
        Infineon<\/td>IFX91041EJV XUMA1<\/td>VQFN-12<\/td>Same function<\/td><\/tr>
        MPS<\/td>MP4581DQ-LF-Z<\/td>QFN-12<\/td>45V 1A sync buck<\/td><\/tr>
        TI<\/td>TPS54061DRBR<\/td>VSON-8<\/td>60V 200mA alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/9971","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=9971"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/9971\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=9971"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=9971"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=9971"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9971"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}