{"id":7413,"date":"2026-06-24T05:03:25","date_gmt":"2026-06-24T05:03:25","guid":{"rendered":"https:\/\/materialparts.com\/lp2951acd-3-3-nopb\/"},"modified":"2026-06-24T05:03:25","modified_gmt":"2026-06-24T05:03:25","slug":"lp2951acd-3-3-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lp2951acd-3-3-nopb\/","title":{"rendered":"LP2951ACD-3.3\/NOPB"},"content":{"rendered":"

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

The LP2951ACD-3.3\/NOPB from Texas Instruments is a micropower LDO regulator with fixed 3.3V output, 100mA, 380mV dropout, error flag, and shutdown in an 8-pin SOIC package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Output Voltage<\/td>\n3.3 V (fixed)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n100 mA<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n380 mV @ 100mA<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n75 uA typical<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n3.8 V to 30 V<\/td>\n<\/tr>\n
Output Accuracy<\/td>\n+\/-1% at 25\u00b0C (AC grade)<\/td>\n<\/tr>\n
Error Flag<\/td>\nYes (open-collector)<\/td>\n<\/tr>\n
Shutdown<\/td>\nYes (logic level)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8 (3.9mm wide)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Fixed 3.3V LDO in SOIC-8 with error flag and shutdown<\/li>\n
  • AC grade +\/-1% accuracy, 380mV dropout at 100mA<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 3.3V LDO for battery-powered and industrial systems in SOIC-8<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LP2951ACD-3.3\/NOPB from Texas Instruments is a micropower LDO regulator with fixed 3.3V output, 100mA, 380mV dropout, error flag, and shutdown in an 8-pin SOIC package. Key Specifications Output Voltage 3.3 V (fixed) Output Current 100 mA Dropout Voltage 380 mV @ 100mA Quiescent Current 75 uA typical Input Voltage 3.8 V to […]<\/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":[13,32],"tags":[],"chip_brand":[138],"class_list":["post-7413","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"Fixed 3.3V LDO, 100mA, 380mV dropout, error flag, SOIC-8","date_code":"","package_case":"SOIC-8 (4.90 x 3.91 x 1.50 mm)","in_stock":6700,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lp2951-n.pdf","price":"$0.58 @ 1ku","product_introduction":"The LP2951ACD-3.3\/NOPB from Texas Instruments is the SOIC-8 package version of the fixed 3.3V LP2951AC LDO regulator. Compared to the VSSOP-8 version (LP2951ACMX-3.3), this device uses the wider SOIC-8 package which is easier to handle in manual assembly and rework. The device provides a precisely regulated 3.3V output at up to 100mA with only 380mV dropout. The AC grade provides +\/-1% output accuracy at 25\u00b0C. The error flag output indicates when the output drops below approximately 92% of nominal (3.04V), providing early power-fail warning. The shutdown pin reduces quiescent current to near zero. The \/NOPB suffix indicates non-braided tape and reel packaging.","working_principle":"Identical to the LP2951ACMX-3.3\/NOPB. The D suffix denotes the SOIC-8 package, which is wider and easier to solder than the VSSOP-8. All electrical operation is the same. See LP2951ACMX-3.3 entry for working principle.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>VOUT<\/td>3.3V regulated output<\/td><\/tr>
      2<\/td>SENSE<\/td>Feedback sense (connect to VOUT)<\/td><\/tr>
      3<\/td>SHDN<\/td>Shutdown (high = off)<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td><\/tr>
      5<\/td>ERR<\/td>Error flag (open-collector)<\/td><\/tr>
      6<\/td>TAP<\/td>Internal divider tap<\/td><\/tr>
      7<\/td>FB<\/td>Feedback input (NC for fixed 3.3V)<\/td><\/tr>
      8<\/td>VIN<\/td>Input supply (3.8-30V)<\/td><\/tr><\/table>","application_scenarios":"
      • 3.3V LDO regulation in SOIC-8 for battery-powered industrial systems<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LP2951ACMX-3.3\/NOPB<\/td>VSSOP-8<\/td>Same function, smaller package<\/td><\/tr>
        TI<\/td>LP2951ACD-5.0\/NOPB<\/td>SOIC-8<\/td>Fixed 5.0V version<\/td><\/tr>
        TI<\/td>LP2951ACD\/NOPB<\/td>SOIC-8<\/td>Adjustable version<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7413","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=7413"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7413\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7413"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7413"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7413"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7413"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}