{"id":7314,"date":"2026-06-24T03:37:51","date_gmt":"2026-06-24T03:37:51","guid":{"rendered":"https:\/\/materialparts.com\/lm2676s-5-0\/"},"modified":"2026-06-24T03:37:51","modified_gmt":"2026-06-24T03:37:51","slug":"lm2676s-5-0","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/lm2676s-5-0\/","title":{"rendered":"LM2676S-5.0"},"content":{"rendered":"

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

The LM2676S-5.0 from Texas Instruments is a SIMPLE SWITCHER 3A step-down voltage regulator providing a fixed 5V output from an 8V to 40V input. Featuring a 150mOhm DMOS switch, 260kHz operation, and up to 94% efficiency in a TO-263 (KTW) package.<\/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\n\n
\u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n8 V to 40 V<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n5.0 V (fixed, +\/-2%)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n3 A<\/td>\n<\/tr>\n
Switch RDS(on)<\/td>\n150 mOhm (DMOS)<\/td>\n<\/tr>\n
\u062a\u0631\u062f\u062f \u0627\u0644\u062a\u062d\u0648\u064a\u0644<\/td>\n260 kHz (fixed)<\/td>\n<\/tr>\n
Efficiency<\/td>\nUp to 94%<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u0647\u062f\u0626\u0629<\/td>\n4.2 mA typical (operating)<\/td>\n<\/tr>\n
\u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a<\/td>\n50 uA (shutdown via ON\/OFF pin)<\/td>\n<\/tr>\n
Duty Cycle<\/td>\n0% to 100%<\/td>\n<\/tr>\n
Protection<\/td>\nThermal shutdown, current limit<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40\u00b0C to +125\u00b0C (junction)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nTO-263-7 (KTW)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 3A output with integrated 150mOhm DMOS switch for high-efficiency buck regulation<\/li>\n
  • Fixed 5V output with +\/-2% accuracy over line, load, and temperature<\/li>\n
  • 8V to 40V wide input range suitable for 12V, 24V, and 28V systems<\/li>\n
  • Only 5 external components required for a complete step-down regulator<\/li>\n
  • ON\/OFF pin for shutdown with 50uA standby current<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • 12V\/24V to 5V step-down conversion at up to 3A in industrial systems<\/li>\n
    • Telecom and automotive power supply with 8-40V input range<\/li>\n
    • Distributed power architectures requiring efficient 5V regulation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM2676S-5.0 from Texas Instruments is a SIMPLE SWITCHER 3A step-down voltage regulator providing a fixed 5V output from an 8V to 40V input. Featuring a 150mOhm DMOS switch, 260kHz operation, and up to 94% efficiency in a TO-263 (KTW) package. Key Specifications Input Voltage 8 V to 40 V Output Voltage 5.0 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[32],"tags":[],"chip_brand":[138],"class_list":["post-7314","post","type-post","status-publish","format-standard","hentry","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"8-40V 3A SIMPLE SWITCHER buck, 5V fixed output, 150mR DMOS, 260kHz, 94% eff, TO-263","date_code":"","package_case":"TO-263-7 \/ KTW (10.10 x 8.89 mm)","in_stock":6740,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm2676.pdf","price":"$2.94 @ 1ku","product_introduction":"The LM2676S-5.0 from Texas Instruments is a SIMPLE SWITCHER step-down voltage regulator providing a fixed 5.0V output at up to 3A from an 8V to 40V input. The device integrates a 150mOhm DMOS power switch and all necessary control circuitry, requiring only 5 external components (input capacitor, bootstrap capacitor, catch diode, inductor, and output capacitor) for a complete step-down regulator design. The 260kHz fixed-frequency oscillator allows the use of physically small inductors and capacitors. Efficiency reaches up to 94% at full load, significantly reducing thermal management requirements. The output voltage tolerance is maintained at +\/-2% over all line, load, and temperature conditions. An ON\/OFF control pin allows the regulator to be shut down to a 50uA standby current. Internal thermal shutdown and current limiting protect the device during fault conditions. The TO-263 (KTW) surface-mount package provides excellent thermal performance with a low junction-to-case thermal resistance.","working_principle":"The LM2676S-5.0 uses a current-mode buck regulator topology with an integrated DMOS power switch. (1) Current-Mode Control: An internal oscillator generates a 260kHz clock. Each clock cycle, the high-side DMOS switch turns on and current through the inductor ramps up. A current sense comparator monitors the switch current and terminates the on-time when the peak current reaches the error amplifier output level. (2) Output Regulation: The internal resistor divider samples the output voltage and compares it with a 2.21V internal reference. The error amplifier adjusts the peak current setpoint to maintain 5V output regulation. (3) DMOS Switch: The 150mOhm N-channel DMOS transistor provides the power switching function. A bootstrap circuit (CB capacitor) generates the gate drive voltage above VIN for the high-side switch. (4) Catch Diode: An external Schottky diode conducts the inductor current during the switch off-time. The diode must have a reverse voltage rating above VIN and a forward current rating above IOUT. (5) Shutdown: When the ON\/OFF pin is pulled below 1.4V, the regulator enters standby mode with 50uA supply current. When floating or driven above 2.0V, normal operation resumes.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>SWITCH<\/td>Power switch output (to inductor)<\/td><\/tr>
      2<\/td>VIN<\/td>Input supply (8-40V)<\/td><\/tr>
      3<\/td>CB<\/td>Bootstrap capacitor (to SWITCH)<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td><\/tr>
      5<\/td>FEEDBACK<\/td>Output voltage feedback (connect to VOUT for 5V)<\/td><\/tr>
      6<\/td>ON\/OFF<\/td>Shutdown control (float=on, low=off)<\/td><\/tr>
      7<\/td>GND<\/td>Ground (tab)<\/td><\/tr><\/table>","application_scenarios":"
      • 12V or 24V to 5V at 3A in industrial and telecom power supplies<\/li>
      • Automotive 12V\/24V system 5V regulation with TO-263 thermal performance<\/li>
      • Distributed power 5V regulation with 94% efficiency and 5-component BOM<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM2676S-3.3<\/td>TO-263-7<\/td>3.3V fixed output version<\/td><\/tr>
        TI<\/td>LM2676S-ADJ<\/td>TO-263-7<\/td>Adjustable output version<\/td><\/tr>
        TI<\/td>LM2679T-5.0<\/td>TO-220-7<\/td>5A version, through-hole<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7314","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=7314"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7314\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=7314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=7314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=7314"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7314"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}