{"id":2538,"date":"2026-05-23T06:10:32","date_gmt":"2026-05-23T06:10:32","guid":{"rendered":"https:\/\/materialparts.com\/lm2937imp-5-0-nopb\/"},"modified":"2026-05-23T06:10:32","modified_gmt":"2026-05-23T06:10:32","slug":"lm2937imp-5-0-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm2937imp-5-0-nopb\/","title":{"rendered":"LM2937IMP-5.0\/NOPB"},"content":{"rendered":"

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

The LM2937IMP-5.0\/NOPB from Texas Instruments is a 500mA low-dropout voltage regulator with a fixed 5.0V output in a SOT-223 surface-mount package. It features high PSRR, low quiescent current, and built-in protection circuits ideal for automotive and industrial applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
Output Voltage<\/td>\n5.0V (fixed)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n500mA<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n6V ~ 26V<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n0.5V typ @ 500mA<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n10mA typ<\/td>\n<\/tr>\n
Line Regulation<\/td>\n50mV<\/td>\n<\/tr>\n
Load Regulation<\/td>\n50mV<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C ~ 85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 500mA output with low dropout voltage<\/li>\n
  • Wide input voltage range up to 26V<\/li>\n
  • Reverse battery protection<\/li>\n

Short-circuit and thermal shutdown protection<\/td>\n<\/tr>\n
  • Transient load dump protection (+60V\/-50V)<\/li>\n
  • Output accuracy of +\/-5%<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Automotive electronics and ECU power supplies<\/li>\n
    • Battery-powered instrumentation<\/li>\n
    • Industrial control systems<\/li>\n
    • Post-regulation after switching supplies<\/li>\n
    • Portable equipment power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM2937IMP-5.0\/NOPB from Texas Instruments is a 500mA low-dropout voltage regulator with a fixed 5.0V output in a SOT-223 surface-mount package. It features high PSRR, low quiescent current, and built-in protection circuits ideal for automotive and industrial applications. Key Specifications Output Voltage 5.0V (fixed) Output Current 500mA Input Voltage Range 6V ~ 26V […]<\/p>\n","protected":false},"author":2,"featured_media":2578,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[138],"class_list":["post-2538","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"500mA LDO, 5V fixed output, 26V max input, SOT-223, automotive rated","date_code":"","package_case":"SOT-223-4 (6.7 x 3.7 x 1.7 mm)","in_stock":9456,"datasheet":"https:\/\/www.ti.com\/product\/LM2937","price":"$1.10 @ 1ku","product_introduction":"The LM2937IMP-5.0\/NOPB is a 500mA positive low-dropout voltage regulator from Texas Instruments, optimized for automotive and battery-powered applications. It provides a fixed 5.0V output from an input voltage range of 6V to 26V, with a typical dropout voltage of just 0.5V at full load. The device incorporates comprehensive protection including reverse battery protection, +60V\/-50V transient load dump immunity, short-circuit current limiting, and thermal shutdown. These features make it exceptionally robust in harsh electrical environments.","working_principle":"The LM2937 uses a PNP pass transistor to achieve low dropout voltage. In regulation, the error amplifier compares a fraction of the output voltage (via an internal resistor divider) with a bandgap reference, adjusting the PNP transistor base drive to maintain 5.0V at the output. When input voltage drops below the minimum headroom, the PNP saturates and the output tracks the input minus the dropout voltage. Internal protection circuits monitor output current and die temperature, activating current limiting or thermal shutdown when thresholds are exceeded.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VIN<\/td>Input<\/td>Input voltage (6-26V)<\/td><\/tr>
      2<\/td>GND<\/td>Power<\/td>Ground \/ Tab<\/td><\/tr>
      3<\/td>VOUT<\/td>Output<\/td>Regulated 5V output<\/td><\/tr>
      4<\/td>GND (Tab)<\/td>Power<\/td>Ground \/ Heatsink tab<\/td><\/tr><\/table>","application_scenarios":"
      • Automotive ECU and sensor power supplies<\/li>
      • Battery-powered instrumentation and meters<\/li>
      • Post-regulation after switching converters<\/li>
      • Industrial PLC and control module power<\/li>
      • Portable device 5V rail generation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Texas Instruments<\/td>LM2937IMPX-5.0\/NOPB<\/td>SOT-223<\/td>Tape and reel version<\/td><\/tr>
        onsemi<\/td>NCP566ST5T3G<\/td>SOT-223<\/td>5V, 500mA LDO<\/td><\/tr>
        Microchip<\/td>TC1262-5.0VDBTR<\/td>SOT-223<\/td>5V, 500mA, low Iq<\/td><\/tr>
        Infineon<\/td>TLE4274D<\/td>TO-252<\/td>Automotive 5V LDO, 200mA<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2538","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=2538"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2538\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2578"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2538"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}