{"id":10715,"date":"2026-07-20T10:41:57","date_gmt":"2026-07-20T10:41:57","guid":{"rendered":"https:\/\/ic-vendor.com\/lm3000sq-nopb\/"},"modified":"2026-07-20T10:41:57","modified_gmt":"2026-07-20T10:41:57","slug":"lm3000sq-nopb","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/lm3000sq-nopb\/","title":{"rendered":"LM3000SQ\/NOPB"},"content":{"rendered":"

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

The LM3000SQ\/NOPB is a dual synchronous buck controller from Texas Instruments with an input range of 3.3 V to 18.5 V. Packaged in a 32-pin WQFN (RTV), it uses emulated current mode control with bottom-side FET sensing for fast transient response and current limiting without external sense resistors. The two outputs operate 180\u00b0 out of phase for reduced input capacitor requirements.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u62d3\u6251\u7ed3\u6784<\/td>\nDual Synchronous Buck Controller<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n3.3 V to 18.5 V<\/td>\n<\/tr>\n
Output Voltage Range<\/td>\n0.6 V to 80% of VIN<\/td>\n<\/tr>\n
Max Output Current<\/td>\n20 A per channel (external MOSFETs)<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n200 kHz to 1.5 MHz (adjustable)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n32-WQFN (RTV) \u2014 5.0 x 5.0 mm<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
FB Accuracy<\/td>\n1%<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Emulated current mode control with bottom-side FET current sensing<\/li>\n
  • 180\u00b0 out-of-phase operation reduces input capacitance<\/li>\n
  • Independent enable, soft-start, and track for each output<\/li>\n
  • Remote differential output voltage sensing<\/li>\n
  • Hiccup mode short-circuit protection<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • DC power distribution systems<\/li>\n
    • Graphics card GPU and memory power<\/li>\n
    • FPGA, CPLD, and ASIC core supplies<\/li>\n
    • Embedded processor I\/O supplies<\/li>\n
    • Networking equipment routers and switches<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM3000SQ\/NOPB is a dual synchronous buck controller from Texas Instruments with an input range of 3.3 V to 18.5 V. Packaged in a 32-pin WQFN (RTV), it uses emulated current mode control with bottom-side FET sensing for fast transient response and current limiting without external sense resistors. The two outputs operate 180\u00b0 […]<\/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":[2055],"chip_brand":[138],"class_list":["post-10715","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","tag-lm3000sq-nopb","chip_brand-ti"],"acf":{"brief_explanation":"Dual sync buck controller, 3.3\u201318.5 V, 20 A\/ch, emulated current mode, 32-WQFN","date_code":"","package_case":"32-WQFN (RTV) \u2014 5.0 x 5.0 mm","in_stock":12462,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm3000.pdf","price":"$3.22 @ 1ku","product_introduction":"The LM3000 is a dual output synchronous buck controller from Texas Instruments designed to convert input voltages from 3.3 V to 18.5 V down to output voltages as low as 0.6 V. The two outputs switch at a programmable frequency of 200 kHz to 1.5 MHz, with the second output 180\u00b0 out of phase to minimize input filter requirements. The emulated current-mode control uses bottom-side FET sensing for fast transient response and current limit without external sense resistors. Separate enable, soft-start, and track pins allow independent control for flexible power sequencing.","working_principle":"The LM3000 uses an emulated current-mode control architecture that synthesizes the inductor current ramp internally. The bottom-side MOSFET RDS(on) is sensed during the off-time to reconstruct the inductor current, eliminating external sense resistors. The error amplifier compares the differential output voltage (sensed remotely) against a 0.6 V reference with 1% accuracy. The PWM comparator generates the gate drive timing. The two channels operate 180\u00b0 out of phase, effectively doubling the input ripple frequency. A CLKOUT pin provides a 90\u00b0 phase-shifted clock for daisy-chaining multiple LM3000 devices. Protection features include UVLO, power good, over-voltage crowbar, and hiccup mode short-circuit protection.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VDD<\/td>Output<\/td>Internal 5 V regulator output<\/td><\/tr>
      2<\/td>EN1<\/td>Input<\/td>Channel 1 enable<\/td><\/tr>
      3<\/td>SS1<\/td>I\/O<\/td>Channel 1 soft-start capacitor<\/td><\/tr>
      4<\/td>TRK1<\/td>Input<\/td>Channel 1 tracking input<\/td><\/tr>
      5<\/td>ILIM1<\/td>Input<\/td>Channel 1 current limit set<\/td><\/tr>
      6<\/td>FB1<\/td>Input<\/td>Channel 1 feedback (diff +)<\/td><\/tr>
      7<\/td>CMP1<\/td>I\/O<\/td>Channel 1 compensation<\/td><\/tr>
      8<\/td>VIN<\/td>Input<\/td>Input supply (3.3\u201318.5 V)<\/td><\/tr>
      9<\/td>SW1<\/td>I\/O<\/td>Channel 1 switch node<\/td><\/tr>
      10<\/td>HO1<\/td>Output<\/td>Channel 1 high-side gate drive<\/td><\/tr>
      11<\/td>LO1<\/td>Output<\/td>Channel 1 low-side gate drive<\/td><\/tr>
      12<\/td>PGND1<\/td>Power<\/td>Channel 1 power ground<\/td><\/tr>
      13\u201316<\/td>Ch2 pins<\/td>Mixed<\/td>Channel 2 mirrors Ch1<\/td><\/tr>
      17<\/td>PGOOD2<\/td>Output<\/td>Channel 2 power good<\/td><\/tr>
      18<\/td>PGOOD1<\/td>Output<\/td>Channel 1 power good<\/td><\/tr><\/table>","application_scenarios":"
      • 12 V to point-of-load conversion for GPU and memory<\/li>
      • FPGA core and I\/O dual-rail power generation<\/li>
      • Networking equipment dual-output DC-DC conversion<\/li>
      • 5 V \/ 12 V industrial power distribution<\/li>
      • Embedded processor core and DDR supply<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM3150MHX\/NOPB<\/td>20-HTSSOP<\/td>Single sync buck controller, similar range<\/td><\/tr>
        TI<\/td>LM5141RHBR<\/td>28-TSSOP<\/td>Single 100 V sync buck controller<\/td><\/tr>
        Analog Devices<\/td>LT3718EUH#PBF<\/td>32-QFN<\/td>Dual step-down controller<\/td><\/tr>
        Infineon<\/td>IR3651STRPBF<\/td>28-TSSOP<\/td>Dual step-down controller<\/td><\/tr>
        Richtek<\/td>RT8859MGS<\/td>32-VQFN<\/td>Dual step-down controller<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10715","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=10715"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10715\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10715"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}