{"id":2926,"date":"2026-05-27T14:11:23","date_gmt":"2026-05-27T14:11:23","guid":{"rendered":"https:\/\/materialparts.com\/ltc4418cufpbf\/"},"modified":"2026-05-27T14:11:23","modified_gmt":"2026-05-27T14:11:23","slug":"ltc4418cufpbf","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ltc4418cufpbf\/","title":{"rendered":"LTC4418CUF#PBF"},"content":{"rendered":"

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

The LTC4418CUF#PBF from Analog Devices is a dual-channel prioritized PowerPath controller in a 20-lead 4x4mm QFN package. It connects one of two valid power supplies to a common output based on priority and validity, with 2.5V to 40V operating range, 26\u03bcA quiescent current, \u00b11.5% OV\/UV protection, and fast non-overlap switchover that blocks reverse and cross conduction currents.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Operating Voltage Range<\/td>\n2.5V to 40V<\/td>\n<\/tr>\n
Input Protection<\/td>\n-42V reverse, 60V tolerant V1\/V2<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n26\u03bcA typ.<\/td>\n<\/tr>\n
OV\/UV Threshold Accuracy<\/td>\n\u00b11.5%<\/td>\n<\/tr>\n
Gate Drive Clamp<\/td>\n6V (protects external MOSFETs)<\/td>\n<\/tr>\n
Validation Time<\/td>\nAdjustable via external capacitor<\/td>\n<\/tr>\n
Soft Start<\/td>\nControlled (minimizes inrush)<\/td>\n<\/tr>\n
VALID Output<\/td>\nOpen-drain status indicators<\/td>\n<\/tr>\n
Cascadeable<\/td>\nYes (with LTC4417 for 3+ inputs)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n20-Lead QFN (4 x 4 x 0.75mm w\/ EP)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0\u00b0C to +70\u00b0C (C-grade)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Selects highest priority valid supply from two inputs<\/li>\n
  • Blocks reverse and cross conduction currents<\/li>\n
  • Wide 2.5V to 40V operating voltage range<\/li>\n
  • -42V reverse connection protection; 60V tolerant V1\/V2 inputs<\/li>\n
  • Adjustable input validation time<\/li>\n
  • Fast switchover minimizes output voltage droop<\/li>\n
  • Low 26\u03bcA operating quiescent current<\/li>\n
  • \u00b11.5% accurate OV\/UV protection thresholds<\/li>\n
  • Adjustable overvoltage\/undervoltage hysteresis<\/li>\n
  • Cascadeable with LTC4417 for additional input supplies<\/li>\n
  • 6V gate drive clamp for external MOSFET protection<\/li>\n
  • Controlled soft-start minimizes inrush current<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial handheld instruments<\/li>\n
    • High availability and redundant power systems<\/li>\n
    • Battery backup systems<\/li>\n
    • Servers and computer peripherals<\/li>\n
    • Automotive dual-supply switchover<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LTC4418CUF#PBF from Analog Devices is a dual-channel prioritized PowerPath controller in a 20-lead 4x4mm QFN package. It connects one of two valid power supplies to a common output based on priority and validity, with 2.5V to 40V operating range, 26\u03bcA quiescent current, \u00b11.5% OV\/UV protection, and fast non-overlap switchover that blocks reverse […]<\/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":[13,29],"tags":[],"chip_brand":[165],"class_list":["post-2926","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-adi"],"acf":{"brief_explanation":"Dual-channel prioritized PowerPath controller, 2.5-40V, 26\u03bcA Iq, \u00b11.5% OV\/UV, 20-QFN 4x4","date_code":"","package_case":"QFN-20 (4 x 4 x 0.75mm with exposed pad)","in_stock":3824,"datasheet":"https:\/\/www.analog.com\/en\/products\/ltc4418.html","price":"$3.39 @ 1ku","product_introduction":"The LTC4418CUF#PBF from Analog Devices is a dual-channel prioritized PowerPath controller that connects one of two valid power supplies to a common output based on priority and validity. Priority is defined by pin assignment: V1 has higher priority, V2 has lower. A supply is valid when its voltage remains within the OV\/UV window continuously for at least the configured validation time. The device incorporates fast non-overlap switching circuitry to prevent both reverse and cross conduction while minimizing output voltage droop. The gate driver includes a 6V clamp for external MOSFET protection, and controlled soft-start minimizes inrush current. Multiple LTC4418s can be cascaded for more than two input supplies.","working_principle":"The LTC4418 monitors two input power supplies through external resistive divider networks connected to the UV and OV pins of each channel. When an input voltage remains within its programmed undervoltage\/overvoltage window for the duration of the validation time (set by an external capacitor on the TMR pin), the VALID output asserts to indicate a valid supply. The controller always connects the highest-priority valid input (V1) to the common output by driving the gate of the corresponding external P-channel MOSFET. If V1 falls outside its valid window, the V1 channel is immediately disconnected and V2 is connected with minimal switchover time. Fast non-overlap switching ensures both MOSFETs are never on simultaneously, blocking reverse and cross-conduction currents. The 6V gate clamp protects the external MOSFET gates from overvoltage.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>V1<\/td>Power<\/td>Input 1 supply (higher priority)<\/td><\/tr>
      2<\/td>UV1<\/td>Input<\/td>Channel 1 undervoltage threshold<\/td><\/tr>
      3<\/td>OV1<\/td>Input<\/td>Channel 1 overvoltage threshold<\/td><\/tr>
      4<\/td>VS1<\/td>Input<\/td>Channel 1 source sense for gate drive<\/td><\/tr>
      5<\/td>G1<\/td>Output<\/td>Channel 1 gate drive for external PFET<\/td><\/tr>
      6<\/td>VALID1<\/td>Output<\/td>Channel 1 valid status (open-drain)<\/td><\/tr>
      7<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      8<\/td>TMR<\/td>I\/O<\/td>Validation time adjust (external cap)<\/td><\/tr>
      9<\/td>SHDN<\/td>Input<\/td>Shutdown control (active low)<\/td><\/tr>
      10<\/td>HYS<\/td>Input<\/td>OV\/UV hysteresis adjustment<\/td><\/tr>
      11<\/td>INTVCC<\/td>Power<\/td>Internal regulated supply<\/td><\/tr>
      12<\/td>VOUT<\/td>Power<\/td>Common output connection<\/td><\/tr>
      13<\/td>VALID2<\/td>Output<\/td>Channel 2 valid status (open-drain)<\/td><\/tr>
      14<\/td>G2<\/td>Output<\/td>Channel 2 gate drive for external PFET<\/td><\/tr>
      15<\/td>VS2<\/td>Input<\/td>Channel 2 source sense for gate drive<\/td><\/tr>
      16<\/td>OV2<\/td>Input<\/td>Channel 2 overvoltage threshold<\/td><\/tr>
      17<\/td>UV2<\/td>Input<\/td>Channel 2 undervoltage threshold<\/td><\/tr>
      18<\/td>V2<\/td>Power<\/td>Input 2 supply (lower priority)<\/td><\/tr><\/table>","application_scenarios":"
      • Battery-to-wall-adapter automatic switchover in portable instruments<\/li>
      • Redundant power supply ORing in high-availability servers<\/li>
      • Battery backup systems with priority supply selection<\/li>
      • Industrial systems requiring seamless power path transition<\/li>
      • Automotive dual-battery system prioritization<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ADI<\/td>LTC4417IUF#PBF<\/td>QFN-24<\/td>Triple-channel prioritizer<\/td><\/tr>
        ADI<\/td>LTC4419CUF#PBF<\/td>QFN-20<\/td>18V dual-input micropower prioritizer<\/td><\/tr>
        TI<\/td>TPS2116APWR<\/td>TSSOP-20<\/td>Dual-input power mux, 5.5V<\/td><\/tr>
        TI<\/td>TPS2120RUXR<\/td>QFN-12<\/td>Dual-input ORing controller, 22V<\/td><\/tr>
        Maxim<\/td>MAX6326UR31+T<\/td>SOT-23<\/td>Simple priority power controller<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2926","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=2926"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2926\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2926"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2926"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2926"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2926"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}