{"id":5705,"date":"2026-06-11T04:12:58","date_gmt":"2026-06-11T04:12:58","guid":{"rendered":"https:\/\/materialparts.com\/lm3488mm-nopb\/"},"modified":"2026-06-12T03:07:02","modified_gmt":"2026-06-12T03:07:02","slug":"lm3488mm-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm3488mm-nopb\/","title":{"rendered":"LM3488MM\/NOPB"},"content":{"rendered":"

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

The LM3488MM\/NOPB from TI is a versatile N-channel switching controller for flyback, SEPIC, and buck topologies with 2.97-48V input and adjustable frequency in VSSOP-8.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n
\u5305\u88c5<\/td>\nVSSOP-8 (3x3mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • See datasheet for complete specifications<\/li>\n
  • Industry-standard package<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial control<\/li>\n
    • Consumer electronics<\/li>\n
    • Communication equipment<\/li>\n
    • Power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM3488MM\/NOPB from TI is a versatile N-channel switching controller for flyback, SEPIC, and buck topologies with 2.97-48V input and adjustable frequency in VSSOP-8. Key Specifications Package VSSOP-8 (3x3mm) Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Power management<\/p>","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":[138],"class_list":["post-5705","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"N-channel controller for flyback\/SEPIC\/buck, 2.97-48V, VSSOP-8","date_code":"","package_case":"VSSOP-8 (3x3mm)","in_stock":5229,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm3488.pdf","price":"$1.50 @ 1ku","product_introduction":"The LM3488MM\/NOPB from TI is a versatile N-channel switching controller for flyback, SEPIC, and buck topologies with 2.97-48V input and adjustable frequency in VSSOP-8.","working_principle":"The LM3488MM\/NOPB is a versatile N-channel controller for switch-mode power supplies from Texas Instruments in VSSOP-8, operating from 2.97V to 48V input. It is NOT a buck converter but rather a current-mode PWM controller that drives an external N-channel MOSFET, supporting boost, flyback, SEPIC, and buck-boost topologies. The peak current-mode control loop works as follows: the error amplifier compares the FB pin voltage to the internal 1.26V reference and generates a COMP voltage that sets the peak inductor current threshold. The ISENSE pin monitors the voltage across an external current-sense resistor in series with the MOSFET source. When the voltage exceeds the COMP-set threshold, the DR output turns OFF the MOSFET. The switching frequency is adjustable from 100kHz to 1MHz via an external resistor from the FREQ pin (internally tied to COMP in this version). The COMP pin requires an external Type-II compensation network (RC + C) to stabilize the current-mode loop. The SHDN pin has an internal 1.2uA pull-up current source, so leaving it floating enables the device. The DR output can source\/sink 0.7A peak gate current, sufficient for MOSFETs with Qg up to 30nC. The maximum duty cycle is 85-90% (frequency dependent). The device includes slope compensation (0.5V added to ISENSE ramp) to prevent sub-harmonic oscillation at duty cycles above 50%. The input UVLO threshold is 2.7V (rising).","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>FB<\/td>Input<\/td>Feedback (connect resistor divider, 1.26V reference)<\/td><\/tr>
      2<\/td>COMP<\/td>Analog<\/td>Error amplifier output (connect RC compensation network)<\/td><\/tr>
      3<\/td>SHDN<\/td>Input<\/td>Shutdown (HIGH=ON, LOW=shutdown, internal pull-up)<\/td><\/tr>
      4<\/td>AGND<\/td>Power<\/td>Analog ground<\/td><\/tr>
      5<\/td>ISENSE<\/td>Input<\/td>Current sense input (connect sense resistor to PGND)<\/td><\/tr>
      6<\/td>PGND<\/td>Power<\/td>Power ground (FET driver return)<\/td><\/tr>
      7<\/td>DR<\/td>Output<\/td>Gate drive output (drives external N-ch MOSFET gate)<\/td><\/tr>
      8<\/td>VIN<\/td>Power<\/td>Input supply (2.97-48V)<\/td><\/tr><\/table>","application_scenarios":"
    • Industrial control<\/li>
    • Consumer electronics<\/li>
    • Communication equipment<\/li>
    • Power management<\/li>","alternative_models":"
      Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
      Texas Instruments<\/td>LM3488MMX\/NOPB<\/td>VSSOP-8<\/td>Same device, tape-and-reel<\/td><\/tr>
      Texas Instruments<\/td>LM3489MM\/NOPB<\/td>VSSOP-8<\/td>Adjustable current limit version<\/td><\/tr>
      Texas Instruments<\/td>LM5021MM-2\/NOPB<\/td>VSSOP-10<\/td>100V current-mode, similar topology<\/td><\/tr>
      Monolithic Power<\/td>MP3910AGJ-Z<\/td>SOT-23-6<\/td>60V current-mode controller, 600kHz<\/td><\/tr>
      Richtek<\/td>RT8459AGQW<\/td>DFN-10<\/td>60V LED controller, boost\/buck-boost<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5705","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=5705"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5705\/revisions"}],"predecessor-version":[{"id":6057,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5705\/revisions\/6057"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5705"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}