{"id":3577,"date":"2026-06-06T10:57:45","date_gmt":"2026-06-06T10:57:45","guid":{"rendered":"https:\/\/materialparts.com\/lm2675m-5-0-nopb\/"},"modified":"2026-06-06T10:57:45","modified_gmt":"2026-06-06T10:57:45","slug":"lm2675m-5-0-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm2675m-5-0-nopb\/","title":{"rendered":"LM2675M-5.0\/NOPB"},"content":{"rendered":"

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

The LM2675M-5.0\/NOPB from Texas Instruments is a SIMPLE SWITCHER 1A step-down (buck) voltage regulator with fixed 5.0V output. Operating from 8V to 40V input, it achieves up to 96% efficiency with only 5 external components. The 260 kHz fixed-frequency oscillator enables small inductor size 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\n
\u7c7b\u578b<\/td>\n1A Step-Down (Buck) Regulator<\/td>\n<\/tr>\n
Output Voltage<\/td>\n5.0V (fixed)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n1 A<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n8V – 40V<\/td>\n<\/tr>\n
Efficiency<\/td>\nUp to 96%<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n260 kHz (fixed)<\/td>\n<\/tr>\n
Output Accuracy<\/td>\n+\/-1.5% over line and load<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n50 uA (typical)<\/td>\n<\/tr>\n
Standby Current<\/td>\n50 uA (shutdown mode)<\/td>\n<\/tr>\n
External Components<\/td>\n5 (inductor, diode, 2 caps, IC)<\/td>\n<\/tr>\n
Protection<\/td>\nThermal shutdown, current limit<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8 (D)<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to 125 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Fixed 5.0V output with +\/-1.5% accuracy over line and load<\/li>\n
  • 8V to 40V wide input voltage range<\/li>\n
  • Up to 96% efficiency for minimal power dissipation<\/li>\n
  • Only 5 external components required<\/li>\n
  • 260 kHz fixed-frequency oscillator for small inductor size<\/li>\n
  • TTL-compatible shutdown with low 50 uA standby current<\/li>\n
  • Thermal shutdown and current limit protection<\/li>\n
  • Available in 3.3V, 5V, 12V, and adjustable output versions<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Automotive 12V\/24V to 5V power conversion<\/li>\n
    • Industrial distributed power systems<\/li>\n
    • Battery-powered 5V systems<\/li>\n
    • Embedded 5V logic supply from unregulated source<\/li>\n
    • Post-regulation for offline converters<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM2675M-5.0\/NOPB from Texas Instruments is a SIMPLE SWITCHER 1A step-down (buck) voltage regulator with fixed 5.0V output. Operating from 8V to 40V input, it achieves up to 96% efficiency with only 5 external components. The 260 kHz fixed-frequency oscillator enables small inductor size in an 8-pin SOIC package. Key Specifications Type 1A […]<\/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":[138],"class_list":["post-3577","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"1A buck regulator, 5.0V fixed, 8-40V input, 96% eff, 260kHz, SOIC-8, -40-125C","date_code":"","package_case":"SOIC-8 \/ D (4.90 x 3.90 x 1.58 mm)","in_stock":4817,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm2675.pdf","price":"$2.15 @ 1ku","product_introduction":"The LM2675M-5.0\/NOPB from Texas Instruments is a SIMPLE SWITCHER 1A step-down voltage regulator with a fixed 5.0V output. Operating from 8V to 40V input, it achieves up to 96% efficiency using a DMOS power switch fabricated in TI LMDMOS process. The 260 kHz fixed-frequency PWM operation allows the use of small external inductors and capacitors, minimizing total solution size. The complete regulator requires only 5 external components: input capacitor, output capacitor, bootstrap capacitor, Schottky diode, and inductor. The +\/-1.5% output accuracy is maintained over the full input voltage and load current range.","working_principle":"The LM2675M-5.0\/NOPB uses a fixed-frequency pulse-width modulation (PWM) control architecture with a 260 kHz internal oscillator. The internal DMOS power switch is driven by the PWM comparator, which adjusts the duty cycle to maintain the 5.0V output. A current-mode control loop provides fast transient response and cycle-by-cycle current limiting. The bootstrap capacitor on the CB pin provides the gate drive voltage for the high-side DMOS switch. The feedback resistors are integrated for the fixed 5.0V output, eliminating external divider components. The ON\/OFF pin provides TTL-compatible shutdown; when driven low, the device enters standby mode drawing only 50 uA. Thermal shutdown activates at approximately 165 C junction temperature, and current limiting protects the DMOS switch during overload conditions.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>CB<\/td>I\/O<\/td>Bootstrap capacitor (connect 0.01uF to VOUT)<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      3<\/td>ON\/OFF<\/td>Input<\/td>Shutdown control (HIGH=on, LOW=off)<\/td><\/tr>
      4<\/td>VIN<\/td>Power<\/td>Input supply (8-40V)<\/td><\/tr>
      5<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      6<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      7<\/td>SW<\/td>Power<\/td>Switch output (connect to inductor and diode)<\/td><\/tr>
      8<\/td>VOUT<\/td>Output<\/td>Regulated 5.0V output<\/td><\/tr><\/table>","application_scenarios":"
      • Automotive: 12V\/24V battery to 5V logic supply with 96% efficiency<\/li>
      • Industrial: Distributed 24V to 5V power with minimal external components<\/li>
      • Battery systems: High-efficiency 8-40V to 5V conversion for portable equipment<\/li>
      • Embedded logic: 5V MCU and peripheral supply from unregulated DC bus<\/li>
      • Post-regulation: 5V output from offline flyback for clean secondary supply<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM2675M-3.3\/NOPB<\/td>SOIC-8<\/td>Fixed 3.3V version, same specs<\/td><\/tr>
        TI<\/td>LM2675M-ADJ\/NOPB<\/td>SOIC-8<\/td>Adjustable 1.21-37V version<\/td><\/tr>
        TI<\/td>LM2679M-5.0\/NOPB<\/td>SOIC-8<\/td>3A version, same family<\/td><\/tr>
        Monolithic Power<\/td>MP1584EN-LF-Z<\/td>SOIC-8<\/td>3A, 4.5-28V, 1.5MHz, smaller inductor<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3577","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=3577"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3577\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3577"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3577"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}