{"id":2940,"date":"2026-05-27T14:30:23","date_gmt":"2026-05-27T14:30:23","guid":{"rendered":"https:\/\/materialparts.com\/en5337qi\/"},"modified":"2026-05-27T14:41:02","modified_gmt":"2026-05-27T14:41:02","slug":"en5337qi","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/en5337qi\/","title":{"rendered":"EN5337QI"},"content":{"rendered":"

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

The EN5337QI from Altera (Enpirion) is a 3A PowerSoC synchronous buck DC-DC converter with an integrated inductor in a 7x4mm QFN-38 package. Operating at 5MHz switching frequency from 2.375V to 5.5V input, it delivers adjustable 0.6V to 5V output at up to 92% efficiency with a total solution footprint of approximately 75mm\u00b2.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u62d3\u6251\u7ed3\u6784<\/td>\nSynchronous Buck (Step-Down)<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n2.375V to 5.5V<\/td>\n<\/tr>\n
Output Voltage<\/td>\n0.6V to 5V (adjustable)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n3A continuous<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n5MHz<\/td>\n<\/tr>\n
Peak Efficiency<\/td>\n92%<\/td>\n<\/tr>\n
Integrated Inductor<\/td>\nYes (in package)<\/td>\n<\/tr>\n
Integrated MOSFETs<\/td>\nYes (high-side + low-side)<\/td>\n<\/tr>\n
\u63a7\u5236\u6a21\u5f0f<\/td>\nVoltage-mode PWM<\/td>\n<\/tr>\n
Output Enable<\/td>\nActive high<\/td>\n<\/tr>\n
Power OK (POK)<\/td>\nYes<\/td>\n<\/tr>\n
External Sync<\/td>\nYes (SYNC pin)<\/td>\n<\/tr>\n
Soft Start<\/td>\nProgrammable<\/td>\n<\/tr>\n
Protection<\/td>\nOCP, SCP, OTP, UVLO<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nQFN-38 (7 x 4 x 1.85mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
Life Cycle<\/td>\nObsolete (EOL)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Integrated inductor, MOSFETs, and controller in one package<\/li>\n
  • Total power solution footprint \u2248 75mm\u00b2<\/li>\n
  • 3A continuous output current<\/li>\n
  • 5MHz switching frequency (external clock sync)<\/li>\n
  • Up to 92% peak efficiency<\/li>\n
  • Adjustable output from 0.6V to 5V<\/li>\n
  • Programmable soft-start time<\/li>\n
  • Power OK output signal<\/li>\n
  • Undervoltage lockout (UVLO)<\/li>\n
  • Overcurrent protection (OCP)<\/li>\n
  • Short circuit protection (SCP)<\/li>\n
  • Thermal shutdown protection (OTP)<\/li>\n
  • Minimal external components required<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Point-of-load regulation for FPGAs and ASICs<\/li>\n
    • Low-power processor and DSP core voltage<\/li>\n
    • Noise-sensitive A\/V and RF applications<\/li>\n
    • Distributed power architectures (2.5V, 3.3V, 5V rails)<\/li>\n
    • Networking, computing, and consumer equipment<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The EN5337QI from Altera (Enpirion) is a 3A PowerSoC synchronous buck DC-DC converter with an integrated inductor in a 7x4mm QFN-38 package. Operating at 5MHz switching frequency from 2.375V to 5.5V input, it delivers adjustable 0.6V to 5V output at up to 92% efficiency with a total solution footprint of approximately 75mm\u00b2. Key […]<\/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":[132],"class_list":["post-2940","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-altera"],"acf":{"brief_explanation":"3A PowerSoC buck converter, 5MHz, integrated inductor, 2.375-5.5V in, 0.6-5V out, 92% eff, QFN-38 7x4mm","date_code":"","package_case":"QFN-38 (7.0 x 4.0 x 1.9mm, exposed pad)","in_stock":1152,"datasheet":"https:\/\/cdrdv2.intel.com\/v1\/dl\/getContent\/632775?fileName=en5337qi_02638.pdf","price":"$3.50 @ 1ku","product_introduction":"The EN5337QI from Altera (formerly Enpirion) is a 3A PowerSoC synchronous buck DC-DC converter that integrates the MOSFET switches, controller, compensation, and inductor into a single 7x4mm QFN-38 package. Operating at 5MHz switching frequency from a 2.375V to 5.5V input, it delivers an adjustable output from 0.6V to 5V at up to 92% efficiency. The total solution footprint is only approximately 75mm\u00b2, requiring just input and output capacitors externally. Note: This device is obsolete; the EN5339QI or Intel Enpirion 3A PowerSoC alternatives should be considered for new designs.","working_principle":"The EN5337QI uses a voltage-mode PWM control architecture operating at a fixed 5MHz switching frequency. The integrated high-side and low-side MOSFET switches are driven by the controller, with the proprietary integrated inductor storing energy during the on-time and releasing it during the off-time. The 5MHz frequency enables very small inductor and capacitor values, allowing the inductor to be integrated within the package. The voltage-mode control compares a fraction of the output voltage (through the FB pin) against an internal reference, with the error amplifier driving the PWM modulator. External clock synchronization via the SYNC pin allows multiple converters to operate at the same frequency, preventing beat-frequency interference in noise-sensitive applications.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1-2, 12, 34-38<\/td>NC(SW)<\/td>-<\/td>No connect (internally connected to switch node, do not connect externally)<\/td><\/tr>
      3-11<\/td>VOUT<\/td>Power<\/td>Regulated output voltage<\/td><\/tr>
      13-18<\/td>PGND<\/td>Power<\/td>Power ground (connect to GND plane)<\/td><\/tr>
      19-21<\/td>PVIN<\/td>Power<\/td>Input power supply (2.375V to 5.5V)<\/td><\/tr>
      22-25<\/td>NC<\/td>-<\/td>No connect (do not connect)<\/td><\/tr>
      26<\/td>SYNC<\/td>Input<\/td>External clock synchronization<\/td><\/tr>
      27<\/td>ENABLE<\/td>Input<\/td>Output enable (active high)<\/td><\/tr>
      28<\/td>POK<\/td>Output<\/td>Power OK status (open-drain)<\/td><\/tr>
      29<\/td>SS<\/td>Analog<\/td>Soft-start capacitor<\/td><\/tr>
      30<\/td>FB<\/td>Input<\/td>Output voltage feedback<\/td><\/tr>
      31<\/td>AGND<\/td>Power<\/td>Analog ground<\/td><\/tr>
      32<\/td>AVIN<\/td>Power<\/td>Analog supply input<\/td><\/tr>
      33<\/td>EAOUT<\/td>Analog<\/td>Error amplifier output (compensation)<\/td><\/tr><\/table>","application_scenarios":"
      • Point-of-load 1.0V\/1.2V core voltage for Altera FPGAs<\/li>
      • Low-noise 1.8V\/2.5V rail for RF and A\/V circuits<\/li>
      • Compact 3.3V to 1.5V conversion in space-constrained designs<\/li>
      • Multi-rail distributed power with SYNC synchronization<\/li>
      • High-density computing and networking board power<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Altera\/Intel<\/td>EN5339QI<\/td>QFN-38<\/td>3A low-profile replacement, newer<\/td><\/tr>
        Altera\/Intel<\/td>EN5366QI<\/td>QFN-38<\/td>6A version, same footprint concept<\/td><\/tr>
        TI<\/td>TPSM84421M0R<\/td>B3QFN-25<\/td>4A module with integrated inductor<\/td><\/tr>
        Monolithic Power<\/td>MPM3690GQV-10<\/td>QFN-22<\/td>3A module, 6V input, integrated inductor<\/td><\/tr>
        Richtek<\/td>RTZ9203GQW<\/td>QFN-24<\/td>3A integrated inductor module<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2940","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=2940"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2940\/revisions"}],"predecessor-version":[{"id":2946,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2940\/revisions\/2946"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2940"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2940"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2940"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}