{"id":6559,"date":"2026-06-18T13:52:19","date_gmt":"2026-06-18T13:52:19","guid":{"rendered":"https:\/\/materialparts.com\/tps51125rger\/"},"modified":"2026-06-18T13:52:19","modified_gmt":"2026-06-18T13:52:19","slug":"tps51125rger","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tps51125rger\/","title":{"rendered":"TPS51125RGER"},"content":{"rendered":"

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

The TPS51125RGER from Texas Instruments is a dual-channel, 5A\/5A synchronous step-down controller for notebook system power. It supports 5V to 28V input and features D-CAP mode for fast transient response, packaged in a 24-pin VQFN (4x4mm).<\/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
\u0627\u0644\u0642\u0646\u0648\u0627\u062a<\/td>\n2 (dual output)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n5A per channel<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n5V to 28V<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n0.75V to 5.5V<\/td>\n<\/tr>\n
\u062a\u0631\u062f\u062f \u0627\u0644\u062a\u062d\u0648\u064a\u0644<\/td>\n300kHz (CH1), 400kHz (CH2)<\/td>\n<\/tr>\n
\u0627\u0644\u0637\u0648\u0628\u0648\u0644\u0648\u062c\u064a\u0627<\/td>\nSynchronous buck controller<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n24-VQFN (4x4mm)<\/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<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • D-CAP mode for fast transient response<\/li>\n
  • No external compensation components required<\/li>\n
  • Internal 5V LDO for MOSFET gate drive<\/li>\n
  • Adaptive on-time control<\/li>\n
  • Overcurrent protection with hiccup mode<\/li>\n
  • Power good output per channel<\/li>\n
  • Adjustable soft-start<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Notebook PC system power<\/li>\n
    • Dual-rail DDR memory power<\/li>\n
    • Embedded system point-of-load<\/li>\n
    • Industrial distributed power<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS51125RGER from Texas Instruments is a dual-channel, 5A\/5A synchronous step-down controller for notebook system power. It supports 5V to 28V input and features D-CAP mode for fast transient response, packaged in a 24-pin VQFN (4x4mm). Key Specifications Channels 2 (dual output) Output Current 5A per channel Input Voltage 5V to 28V Output […]<\/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":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-6559","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Dual 5A synchronous buck controller, 5-28V input, D-CAP mode, 24-VQFN","date_code":"","package_case":"24-VQFN (4x4mm)","in_stock":14926,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps51125.pdf","price":"$2.10 @ 1ku","product_introduction":"The TPS51125RGER is a dual-channel synchronous step-down controller from Texas Instruments designed for notebook PC system power. Each channel supports up to 5A output current from a 5V to 28V input, with adjustable output voltage from 0.75V to 5.5V. The D-CAP mode control provides fast transient response without external compensation components, simplifying design. An internal 5V LDO supplies gate drive voltage for the external MOSFETs. Protection features include overcurrent with hiccup mode, undervoltage lockout, and thermal shutdown. Power good outputs per channel enable power sequencing.","working_principle":"The TPS51125RGER uses D-CAP (Direct Control with Adaptive on-time) mode control, which is a constant on-time architecture with input voltage feed-forward. The on-time is adjusted based on the input voltage to maintain approximately constant switching frequency. Each channel operates independently with its own feedback loop. The internal 5V LDO provides the gate drive voltage for the external N-channel MOSFETs in the synchronous buck power stage. The adaptive on-time controller compares the output voltage to the reference and triggers a new on-time when the output falls below the threshold, providing inherently stable operation without compensation components. Overcurrent protection monitors the low-side MOSFET voltage drop during the off-time.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>VFB1<\/td>Channel 1 feedback voltage<\/td><\/tr>
      2<\/td>COMP1<\/td>Channel 1 compensation (D-CAP: connect capacitor)<\/td><\/tr>
      3<\/td>TRIP1<\/td>Channel 1 OCP setting<\/td><\/tr>
      4<\/td>PGND1<\/td>Channel 1 power ground<\/td><\/tr>
      5<\/td>DRVL1<\/td>Channel 1 low-side gate drive<\/td><\/tr>
      6<\/td>VREG5<\/td>5V LDO output<\/td><\/tr>
      7<\/td>DRVH1<\/td>Channel 1 high-side gate drive<\/td><\/tr>
      8<\/td>SW1<\/td>Channel 1 switch node<\/td><\/tr>
      9<\/td>PGND2<\/td>Channel 2 power ground<\/td><\/tr>
      10<\/td>DRVL2<\/td>Channel 2 low-side gate drive<\/td><\/tr>
      11<\/td>DRVH2<\/td>Channel 2 high-side gate drive<\/td><\/tr>
      12<\/td>SW2<\/td>Channel 2 switch node<\/td><\/tr>
      13<\/td>VFB2<\/td>Channel 2 feedback voltage<\/td><\/tr>
      14<\/td>COMP2<\/td>Channel 2 compensation<\/td><\/tr>
      15<\/td>TRIP2<\/td>Channel 2 OCP setting<\/td><\/tr>
      16<\/td>PGOOD2<\/td>Channel 2 power good<\/td><\/tr>
      17<\/td>EN2<\/td>Channel 2 enable<\/td><\/tr>
      18<\/td>SS2<\/td>Channel 2 soft-start<\/td><\/tr>
      19<\/td>PGOOD1<\/td>Channel 1 power good<\/td><\/tr>
      20<\/td>EN1<\/td>Channel 1 enable<\/td><\/tr>
      21<\/td>SS1<\/td>Channel 1 soft-start<\/td><\/tr>
      22<\/td>VIN<\/td>Input supply voltage<\/td><\/tr>
      23<\/td>GND<\/td>Analog ground<\/td><\/tr>
      24<\/td>VREF<\/td>Reference output (0.75V)<\/td><\/tr><\/table>","application_scenarios":"
      • Notebook PC dual-rail DDR memory power (VDDQ + VTT)<\/li>
      • Embedded system dual point-of-load converters from 12V\/19V bus<\/li>
      • Industrial distributed power with fast transient response requirements<\/li>
      • Server and networking equipment dual-output power supply<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        TPS51124RGER<\/td>TI<\/td>Similar, different current rating<\/td><\/tr>
        TPS51126RGER<\/td>TI<\/td>Higher current version<\/td><\/tr>
        ISL95813<\/td>Renesas<\/td>Dual buck controller, similar function<\/td><\/tr>
        MP2940<\/td>MPS<\/td>Dual buck controller, PMBus<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6559","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=6559"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6559\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6559"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6559"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}