{"id":3664,"date":"2026-06-07T13:32:26","date_gmt":"2026-06-07T13:32:26","guid":{"rendered":"https:\/\/materialparts.com\/en5339qi\/"},"modified":"2026-06-07T13:32:26","modified_gmt":"2026-06-07T13:32:26","slug":"en5339qi","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/en5339qi\/","title":{"rendered":"EN5339QI"},"content":{"rendered":"

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

The EN5339QI from Intel (formerly Altera\/Enpirion) is a 3A PowerSoC synchronous buck DC-DC converter with integrated inductor in a 4x6mm 24-pin QFN package. Operating from 2.4V to 5.5V input with 3.5MHz switching frequency, it delivers an adjustable output from 0.6V to VIN in a compact footprint suitable for high-current point-of-load regulation.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n
\u8f93\u51fa\u7535\u6d41<\/td>\n3 A (max)<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n2.4V to 5.5V<\/td>\n<\/tr>\n
Output Voltage<\/td>\n0.6V to VIN-Vdropout (adjustable)<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n3.5 MHz (fixed)<\/td>\n<\/tr>\n
Efficiency<\/td>\nUp to 93%<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +125 C (junction)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nQFN-24 (4 x 6 x 1.1 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 3A output current with integrated inductor<\/li>\n
  • 4x6mm QFN-24 package with integrated inductor<\/li>\n
  • 3.5MHz fixed switching frequency<\/li>\n
  • Up to 93% efficiency<\/li>\n
  • Adjustable output voltage via resistor divider<\/li>\n
  • Power OK output<\/li>\n
  • 100% duty cycle low-dropout mode<\/li>\n
  • UVLO, overcurrent, short circuit, and thermal protection<\/li>\n
  • Enable pin with soft-start<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • FPGA and ASIC core power<\/li>\n
    • Point-of-load DC-DC conversion<\/li>\n
    • Computing and networking equipment<\/li>\n
    • Portable instrument power<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The EN5339QI from Intel (formerly Altera\/Enpirion) is a 3A PowerSoC synchronous buck DC-DC converter with integrated inductor in a 4x6mm 24-pin QFN package. Operating from 2.4V to 5.5V input with 3.5MHz switching frequency, it delivers an adjustable output from 0.6V to VIN in a compact footprint suitable for high-current point-of-load regulation. Key Specifications […]<\/p>\n","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":[196],"class_list":["post-3664","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-intel"],"acf":{"brief_explanation":"3A PowerSoC buck converter, integrated inductor, 3.5MHz, 4x6mm QFN-24","date_code":"","package_case":"QFN-24 (4.0 x 6.0 x 1.1 mm)","in_stock":2655,"datasheet":"https:\/\/cdrdv2-public.intel.com\/632780\/en5339qi_06903.pdf","price":"$25.40 @ 1ku","product_introduction":"The EN5339QI from Intel Enpirion is a 3A PowerSoC synchronous buck DC-DC converter integrating the inductor, MOSFET switches, and compensation in a 4x6x1.1mm 24-pin QFN package. The QI suffix denotes the QFN package. Operating from 2.4V to 5.5V input with a 3.5MHz fixed switching frequency, it provides up to 3A output current with adjustable output voltage from 0.6V to VIN. The integrated inductor eliminates the need for external magnetics, simplifying PCB layout and ensuring predictable EMI performance. With up to 93% efficiency and a complete protection suite, the EN5339QI is ideal for high-current FPGA and ASIC point-of-load power conversion.","working_principle":"The EN5339QI operates through four subsystems: (1) Integrated Power Stage: A synchronous buck converter with integrated high-side and low-side MOSFETs and a proprietary thin-film inductor inside the QFN package. The 3.5MHz switching frequency enables the use of a small integrated inductor while maintaining high efficiency. (2) Voltage-Mode PWM Control: A voltage-mode controller with internal compensation drives the power stage. The output voltage is set by an external resistor divider connected to the VFB pin with a 0.6V reference. (3) Power OK and Soft-Start: The POK output provides a power-good indicator. Soft-start limits inrush current during power-up by ramping the reference voltage gradually. (4) Protection: Cycle-by-cycle over-current protection, under-voltage lockout, output over-voltage protection, and thermal shutdown protect the device and load from fault conditions.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1-4<\/td>PGND<\/td>Power<\/td>Power ground connections<\/td><\/tr>
      5, 6<\/td>PVIN<\/td>Power<\/td>Input power supply (2.4-5.5V)<\/td><\/tr>
      7-10<\/td>VOUT<\/td>Power<\/td>Output voltage connections<\/td><\/tr>
      11<\/td>VFB<\/td>Analog<\/td>Feedback pin (0.6V reference)<\/td><\/tr>
      12<\/td>AGND<\/td>Power<\/td>Analog ground<\/td><\/tr>
      13<\/td>AVIN<\/td>Power<\/td>Analog supply input<\/td><\/tr>
      14<\/td>POK<\/td>Output<\/td>Power OK open-drain output<\/td><\/tr>
      15<\/td>ENABLE<\/td>Input<\/td>Enable (high=on, low=off)<\/td><\/tr>
      16-24<\/td>NC\/PGND<\/td>--<\/td>No connect \/ Power ground<\/td><\/tr><\/table>","application_scenarios":"
      • FPGA core power delivery at 3A from 5V or 3.3V input with integrated inductor simplifying design<\/li>
      • ASIC point-of-load regulation with 0.6V reference for low-voltage cores<\/li>
      • High-current POL conversion in networking equipment with Power OK monitoring<\/li>
      • Compact DC-DC solution replacing discrete inductor-based buck converters<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Iout<\/th>Frequency<\/th>Notes<\/th><\/tr>
        FS1406-0600-AL<\/td>TDK<\/td>6A<\/td>3MHz<\/td>Higher current replacement<\/td><\/tr>
        TPS82140SILR<\/td>TI<\/td>3A<\/td>2MHz<\/td>MicroSiP module<\/td><\/tr>
        LMZ31710RVQ<\/td>TI<\/td>10A<\/td>1MHz<\/td>Much higher current<\/td><\/tr>
        EN5366QI<\/td>Intel<\/td>6A<\/td>4MHz<\/td>Same family, higher current<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3664","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=3664"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3664\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3664"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}