{"id":10713,"date":"2026-07-20T10:41:53","date_gmt":"2026-07-20T10:41:53","guid":{"rendered":"https:\/\/ic-vendor.com\/lm26480sq-aa-nopb\/"},"modified":"2026-07-20T10:41:53","modified_gmt":"2026-07-20T10:41:53","slug":"lm26480sq-aa-nopb","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/lm26480sq-aa-nopb\/","title":{"rendered":"LM26480SQ-AA\/NOPB"},"content":{"rendered":"

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

The LM26480SQ-AA\/NOPB is a multi-function power management IC (PMU) from Texas Instruments that integrates two 1.5 A step-down DC-DC converters and two 300 mA LDOs. Packaged in a 24-pin WQFN (RTW), it operates from 2.8 V to 5.5 V and is optimized for powering advanced application processors and FPGAs. Each output features individual enable and power good for flexible power sequencing.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u62d3\u6251\u7ed3\u6784<\/td>\n2x Buck + 2x LDO (4-output PMU)<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n2.8 V to 5.5 V<\/td>\n<\/tr>\n
Buck1 Output<\/td>\n0.8 V to 2 V at 1.5 A<\/td>\n<\/tr>\n
Buck2 Output<\/td>\n1 V to 3.3 V at 1.5 A<\/td>\n<\/tr>\n
LDO Output<\/td>\n1 V to 3.5 V at 300 mA each<\/td>\n<\/tr>\n
Buck Switching Frequency<\/td>\n2 MHz<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n24-WQFN (RTW) \u2014 4.0 x 4.0 mm<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Integrated dual 1.5 A buck converters with up to 96% efficiency<\/li>\n
  • Dual 300 mA LDOs with 25 mV typical dropout<\/li>\n
  • 2 MHz PWM switching with automatic PFM mode at light loads<\/li>\n
  • Individual enable and power good for each output<\/li>\n
  • Internal power-on-reset monitors both buck outputs<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Application processor and FPGA power supplies<\/li>\n
    • Portable and handheld computing devices<\/li>\n
    • Smartphones and tablets<\/li>\n
    • Wireless communication modules<\/li>\n
    • SSD and storage controller power<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM26480SQ-AA\/NOPB is a multi-function power management IC (PMU) from Texas Instruments that integrates two 1.5 A step-down DC-DC converters and two 300 mA LDOs. Packaged in a 24-pin WQFN (RTW), it operates from 2.8 V to 5.5 V and is optimized for powering advanced application processors and FPGAs. Each output features individual […]<\/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":[13,29],"tags":[2053],"chip_brand":[138],"class_list":["post-10713","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","tag-lm26480sq-aa-nopb","chip_brand-ti"],"acf":{"brief_explanation":"Quad PMU: 2x 1.5 A buck + 2x 300 mA LDO, 2.8\u20135.5 V, 2 MHz, 24-WQFN","date_code":"","package_case":"24-WQFN (RTW) \u2014 4.0 x 4.0 mm","in_stock":8236,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm26480.pdf","price":"$1.46 @ 1ku","product_introduction":"The LM26480 is a multi-functional power management unit (PMU) from Texas Instruments, optimized for low-power digital applications. The device integrates two highly efficient 1.5 A step-down DC-DC converters and two 300 mA linear regulators in a compact 24-WQFN package. The DC-DC buck converters provide typical efficiencies up to 96%, with automatic PWM-to-PFM mode change under light loads for optimal efficiency across the load range. Features include soft start, undervoltage lockout, current overload protection, thermal overload protection, and an internal power-on-reset (POR) circuit.","working_principle":"The LM26480 integrates four independent power rails in a single IC. The two buck converters use a constant-frequency PWM architecture at 2 MHz, automatically transitioning to PFM mode at light loads to maintain high efficiency. Each buck uses an internal PMOS high-side switch and NMOS synchronous rectifier. The two LDOs use PMOS pass transistors for low dropout (25 mV typical) and low quiescent current. The power-on-reset circuit monitors the buck outputs and asserts the nPOR flag when either output falls below the threshold. Each output has an independent enable pin for flexible power-up sequencing, and power good outputs indicate regulation status.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VIN<\/td>Input<\/td>Main input supply (2.8\u20135.5 V)<\/td><\/tr>
      2<\/td>SW1<\/td>Output<\/td>Buck1 switch node<\/td><\/tr>
      3<\/td>PGND1<\/td>Power<\/td>Buck1 power ground<\/td><\/tr>
      4<\/td>FB1<\/td>Input<\/td>Buck1 feedback voltage<\/td><\/tr>
      5<\/td>EN1<\/td>Input<\/td>Buck1 enable<\/td><\/tr>
      6<\/td>PG1<\/td>Output<\/td>Buck1 power good<\/td><\/tr>
      7<\/td>EN3<\/td>Input<\/td>LDO1 enable<\/td><\/tr>
      8<\/td>VIN3<\/td>Input<\/td>LDO1 input supply<\/td><\/tr>
      9<\/td>VOUT3<\/td>Output<\/td>LDO1 output<\/td><\/tr>
      10<\/td>FB3<\/td>Input<\/td>LDO1 feedback<\/td><\/tr>
      11<\/td>VOUT4<\/td>Output<\/td>LDO2 output<\/td><\/tr>
      12<\/td>FB4<\/td>Input<\/td>LDO2 feedback<\/td><\/tr>
      13<\/td>VIN4<\/td>Input<\/td>LDO2 input supply<\/td><\/tr>
      14<\/td>EN4<\/td>Input<\/td>LDO2 enable<\/td><\/tr>
      15<\/td>PG2<\/td>Output<\/td>Buck2 power good<\/td><\/tr>
      16<\/td>EN2<\/td>Input<\/td>Buck2 enable<\/td><\/tr>
      17<\/td>FB2<\/td>Input<\/td>Buck2 feedback voltage<\/td><\/tr>
      18<\/td>AGND<\/td>Power<\/td>Analog ground<\/td><\/tr>
      19<\/td>PGND2<\/td>Power<\/td>Buck2 power ground<\/td><\/tr>
      20<\/td>SW2<\/td>Output<\/td>Buck2 switch node<\/td><\/tr><\/table>","application_scenarios":"
      • Multi-rail power for ARM-based application processors<\/li>
      • FPGA core and I\/O voltage generation from single supply<\/li>
      • Smartphone and tablet PMIC solution<\/li>
      • Wireless module power management<\/li>
      • Portable industrial instrument power supply<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TPS65218B0RSLR<\/td>28-VQFN<\/td>4-rail PMIC for processors<\/td><\/tr>
        TI<\/td>TPS6508640RSKR<\/td>56-VQFN<\/td>Multi-rail PMIC, higher integration<\/td><\/tr>
        Richtek<\/td>RT5759AHGF<\/td>24-WQFN<\/td>Dual buck + dual LDO PMU<\/td><\/tr>
        Maxim<\/td>MAX77620EWTP+T<\/td>42-WLP<\/td>Multi-rail PMIC for mobile<\/td><\/tr>
        ROHM<\/td>BD71815AMWEVK<\/td>56-QFN<\/td>Multi-rail PMIC alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10713","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=10713"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10713\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10713"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}