{"id":2479,"date":"2026-05-21T01:19:42","date_gmt":"2026-05-21T01:19:42","guid":{"rendered":"https:\/\/materialparts.com\/lm2675mx-5-0-nopb\/"},"modified":"2026-05-21T01:19:42","modified_gmt":"2026-05-21T01:19:42","slug":"lm2675mx-5-0-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm2675mx-5-0-nopb\/","title":{"rendered":"LM2675MX-5.0\/NOPB"},"content":{"rendered":"

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

The LM2675MX-5.0\/NOPB from Texas Instruments is a SIMPLE SWITCHER 6.5V-to-40V, 1A step-down buck voltage regulator with fixed 5.0V output. It features 260kHz switching frequency, up to 96% efficiency, only 5 external components required, and TTL shutdown capability in an 8-pin SOIC package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u5236\u9020\u5546<\/td>\n\u5fb7\u5dde\u4eea\u5668<\/td>\n<\/tr>\n
\u62d3\u6251\u7ed3\u6784<\/td>\nBuck (Step-Down)<\/td>\n<\/tr>\n
Output Voltage<\/td>\n5.0V (fixed)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n1A<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n8V to 40V<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n260kHz<\/td>\n<\/tr>\n
Efficiency<\/td>\nUp to 96%<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n2.5mA typical<\/td>\n<\/tr>\n
Standby Current<\/td>\n50uA typical<\/td>\n<\/tr>\n
Output Voltage Tolerance<\/td>\n+-1.5% max<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n8-SOIC (4.9 x 6.0mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +125C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Efficiency up to 96%<\/li>\n
  • Only 5 external components required<\/li>\n
  • Fixed 5.0V output with +-1.5% tolerance<\/li>\n
  • 260kHz fixed frequency internal oscillator<\/li>\n
  • 0.25Ohm DMOS output switch<\/li>\n
  • TTL shutdown capability, low-power standby mode<\/li>\n
  • Thermal shutdown and current limit protection<\/li>\n
  • Uses readily available standard inductors<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Simple high-efficiency step-down regulators<\/li>\n
    • Efficient pre-regulator for linear regulators<\/li>\n
    • Positive-to-negative converters<\/li>\n
    • Battery-powered equipment<\/li>\n
    • Embedded system power supplies<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM2675MX-5.0\/NOPB from Texas Instruments is a SIMPLE SWITCHER 6.5V-to-40V, 1A step-down buck voltage regulator with fixed 5.0V output. It features 260kHz switching frequency, up to 96% efficiency, only 5 external components required, and TTL shutdown capability in an 8-pin SOIC package. Key Specifications Manufacturer Texas Instruments Topology Buck (Step-Down) Output Voltage 5.0V […]<\/p>\n","protected":false},"author":2,"featured_media":2866,"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-2479","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"1A SIMPLE SWITCHER buck regulator, 5.0V fixed, 8-40V input, 260kHz, 96% eff, SOIC-8","date_code":"","package_case":"8-SOIC (4.9 x 6.0 x 1.75mm)","in_stock":7430,"datasheet":"https:\/\/www.ti.com\/product\/LM2675","price":"$2.35 @ 1ku","product_introduction":"The Texas Instruments LM2675MX-5.0\/NOPB is a SIMPLE SWITCHER step-down voltage regulator built with LMDMOS process technology. It provides all active functions for a 1A buck switching regulator with fixed 5.0V output. The device requires only five external components and features patented internal frequency compensation and a fixed 260kHz oscillator. The high efficiency exceeding 90% means PCB copper traces provide sufficient heat sinking. Standard inductors from multiple manufacturers are compatible, greatly simplifying design. The device includes +-1.5% output voltage tolerance, external shutdown with 50uA standby current, and current limiting with thermal shutdown protection.","working_principle":"The LM2675MX-5.0\/NOPB operates as a fixed-frequency buck converter with three key subsystems: 1) Oscillator and Control: The 260kHz internal oscillator sets the switching frequency. Voltage-mode control with patented internal compensation maintains output regulation. The duty cycle adjusts to maintain 5.0V output across input voltage and load variations. 2) Power Stage: The internal 0.25Ohm DMOS output switch alternately connects and disconnects the input voltage to the output inductor. When on, energy is stored in the inductor; when off, the catch diode provides a current path, transferring stored energy to the output capacitor and load. 3) Protection: Cycle-by-cycle current limiting prevents switch damage. Thermal shutdown disables the output when junction temperature exceeds the safe limit. The ON\/OFF pin allows TTL-level shutdown with 50uA standby current.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>ON\/OFF<\/td>Input<\/td>Shutdown control (TTL level, active low)<\/td><\/tr>
      2<\/td>VIN<\/td>Power<\/td>Input supply voltage (8V to 40V)<\/td><\/tr>
      3<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      4<\/td>FB<\/td>Input<\/td>Feedback (connect to output for 5V fixed)<\/td><\/tr>
      5<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      6<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      7<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      8<\/td>VSW<\/td>Output<\/td>Switch output (connect to inductor)<\/td><\/tr><\/table>","application_scenarios":"
      • 5V power supply from 12V or 24V industrial bus<\/li>
      • Efficient pre-regulator before low-noise linear regulators<\/li>
      • Battery-powered equipment requiring 5V from 9V-24V sources<\/li>
      • Embedded system point-of-load regulation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM2675MX-3.3\/NOPB<\/td>SOIC-8<\/td>3.3V version, same series<\/td><\/tr>
        TI<\/td>LM2675MX-12\/NOPB<\/td>SOIC-8<\/td>12V version, same series<\/td><\/tr>
        TI<\/td>LM2675MX-ADJ\/NOPB<\/td>SOIC-8<\/td>Adjustable version<\/td><\/tr>
        TI<\/td>LMR16030PDDAR<\/td>HSOIC-8<\/td>60V, 3A, newer alternative<\/td><\/tr>
        Monolithic Power<\/td>MP1484DS<\/td>SOIC-8<\/td>4.5-18V, 2A buck<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2479","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=2479"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2479\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2866"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2479"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2479"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}