{"id":3663,"date":"2026-06-07T13:32:24","date_gmt":"2026-06-07T13:32:24","guid":{"rendered":"https:\/\/materialparts.com\/ep53f8qi\/"},"modified":"2026-06-07T13:32:24","modified_gmt":"2026-06-07T13:32:24","slug":"ep53f8qi","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ep53f8qi\/","title":{"rendered":"EP53F8QI"},"content":{"rendered":"

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

The EP53F8QI from Intel (formerly Altera\/Enpirion) is a 1500mA PowerSoC synchronous buck DC-DC converter with integrated inductor in a 3x3mm 16-pin QFN package. Operating from 2.4V to 5.5V input with up to 94% efficiency and 4MHz switching frequency, it delivers an adjustable output from 0.6V to 4.96V in a total solution footprint of just 40mm2.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n1500 mA (max)<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n2.4V to 5.5V<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n0.6V to VIN-Vdropout (adjustable)<\/td>\n<\/tr>\n
\u062a\u0631\u062f\u062f \u0627\u0644\u062a\u062d\u0648\u064a\u0644<\/td>\n4 MHz (fixed)<\/td>\n<\/tr>\n
Efficiency<\/td>\nUp to 94%<\/td>\n<\/tr>\n
Output Ripple<\/td>\n8 mVp-p (typical)<\/td>\n<\/tr>\n
Solution Footprint<\/td>\n40 mm2 (min)<\/td>\n<\/tr>\n
Power OK Output<\/td>\nYes (open-drain)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n16-pin QFN (3 x 3 x 1.1 mm)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Integrated inductor, MOSFETs, and compensation<\/li>\n
  • Total solution footprint as small as 40mm2<\/li>\n
  • 4MHz fixed switching frequency<\/li>\n
  • Up to 94% efficiency<\/li>\n
  • 8mVp-p low output ripple<\/li>\n
  • Power OK signal with 5mA sink<\/li>\n
  • 100% duty cycle low-dropout operation<\/li>\n
  • UVLO, overcurrent, short circuit, and thermal protection<\/li>\n
  • Adjustable output via external resistor divider<\/li>\n
  • Enable pin with output discharge<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Wireless WAN data cards<\/li>\n
    • LDO replacement in noise-sensitive applications<\/li>\n
    • RF, audio, video, and high-speed I\/O power<\/li>\n
    • USB, DSL, STB, DVR, DTV, and IPC<\/li>\n
    • Computing, storage, and networking<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The EP53F8QI from Intel (formerly Altera\/Enpirion) is a 1500mA PowerSoC synchronous buck DC-DC converter with integrated inductor in a 3x3mm 16-pin QFN package. Operating from 2.4V to 5.5V input with up to 94% efficiency and 4MHz switching frequency, it delivers an adjustable output from 0.6V to 4.96V in a total solution footprint of […]<\/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-3663","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-intel"],"acf":{"brief_explanation":"1.5A PowerSoC buck converter, integrated inductor, 4MHz, 3x3mm QFN, 94% eff","date_code":"","package_case":"QFN-16 (3.0 x 3.0 x 1.1 mm)","in_stock":4877,"datasheet":"https:\/\/cdrdv2-public.intel.com\/632780\/ep53f8qi_01542.pdf","price":"$3.50 @ 1ku","product_introduction":"The EP53F8QI from Intel Enpirion is a 1500mA PowerSoC synchronous buck DC-DC converter with an integrated inductor, MOSFET switches, and compensation in a 3x3x1.1mm 16-pin QFN package. The QI suffix denotes the QFN package with industrial temperature range (-40 to +85C). By integrating the inductor, the EP53F8QI achieves a total solution footprint as small as 40mm2 with only two external capacitors and a resistor divider. The 4MHz fixed switching frequency enables small external capacitors while the integrated inductor minimizes radiated and conducted EMI, making it ideal for noise-sensitive RF and high-speed applications. The output voltage is programmed via an external resistor divider with a 0.6V reference.","working_principle":"The EP53F8QI operates through four subsystems: (1) Integrated Power Stage: A synchronous buck converter with integrated high-side and low-side MOSFETs and a custom thin-film inductor. The 4MHz switching frequency reduces the required inductance value, enabling integration into the QFN package. (2) Voltage-Mode PWM Control: A voltage-mode pulse-width modulation controller with internal type-III compensation. The feedback voltage (VFB) is compared against a 0.6V reference. The output voltage is set by a resistor divider: VOUT = 0.6V x (1 + Ra\/Rb). The upper resistor Ra should be 237kOhm for optimal loop response. (3) Power OK (POK): An open-drain output that pulls low when the output voltage falls below 90% of the set value, providing power-good status to the system. (4) Protection: Under-voltage lockout (UVLO) disables the converter when VIN drops below 2.2V. Over-current protection (OCP) limits the inductor current cycle-by-cycle. Thermal shutdown disables the converter at 155C junction temperature with 15C hysteresis.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1, 15, 16<\/td>NC(SW)<\/td>--<\/td>No connect (internal switch node). Must be soldered to PCB but not electrically connected externally.<\/td><\/tr>
      2, 3<\/td>PGND<\/td>Power<\/td>Power ground. Connect to GND of input\/output capacitors.<\/td><\/tr>
      4<\/td>AVIN2<\/td>Power<\/td>Analog input voltage. Connect to AVIN1 only.<\/td><\/tr>
      5<\/td>VFB<\/td>Analog<\/td>Feedback pin for external voltage divider (0.6V reference).<\/td><\/tr>
      6<\/td>NC<\/td>--<\/td>No connect.<\/td><\/tr>
      7, 8<\/td>VOUT<\/td>Power<\/td>Output voltage and power. Connect to output capacitors.<\/td><\/tr>
      9<\/td>AGND<\/td>Power<\/td>Analog ground for controller circuits.<\/td><\/tr>
      10<\/td>AVIN1<\/td>Power<\/td>Analog supply input. Connect to PVIN via 10Ohm resistor. Decouple with 1uF to AGND.<\/td><\/tr>
      11<\/td>POK<\/td>Output<\/td>Power OK open-drain output (low = output below regulation).<\/td><\/tr>
      12<\/td>ENABLE<\/td>Input<\/td>Enable input (high = on, low = off with output discharge).<\/td><\/tr>
      13, 14<\/td>PVIN<\/td>Power<\/td>Input power supply (2.4-5.5V). Decouple with input capacitors.<\/td><\/tr><\/table>","application_scenarios":"
      • Replacing inefficient LDOs in portable devices with up to 94% buck converter efficiency<\/li>
      • RF power supply with integrated inductor minimizing radiated EMI in noise-sensitive applications<\/li>
      • USB-powered device core voltage generation from 5V to 1.2V\/1.8V\/3.3V in 40mm2 footprint<\/li>
      • High-speed I\/O and FPGA core power with 8mVp-p low ripple and Power OK monitoring<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Iout<\/th>Frequency<\/th>Notes<\/th><\/tr>
        EP53F8QI-E<\/td>Intel<\/td>1.5A<\/td>4MHz<\/td>Evaluation board<\/td><\/tr>
        TPS82671SIPR<\/td>TI<\/td>600mA<\/td>5.5MHz<\/td>Lower current MicroSiP<\/td><\/tr>
        LMZ10501SILR<\/td>TI<\/td>1A<\/td>2MHz<\/td>Nano-module<\/td><\/tr>
        MAX38640AATD+T<\/td>ADI<\/td>500mA<\/td>4MHz<\/td>Smaller, lower current<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3663","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=3663"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3663\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3663"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3663"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}