{"id":7028,"date":"2026-06-23T02:13:59","date_gmt":"2026-06-23T02:13:59","guid":{"rendered":"https:\/\/ic-vendor.com\/mc78l05abdr2g\/"},"modified":"2026-06-23T02:13:59","modified_gmt":"2026-06-23T02:13:59","slug":"mc78l05abdr2g","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/mc78l05abdr2g\/","title":{"rendered":"MC78L05ABDR2G"},"content":{"rendered":"

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

The MC78L05ABDR2G from onsemi is a 5V fixed-output positive linear voltage regulator in an SOIC-8 package. It provides 100mA output current with an input voltage range of 7V to 30V, making it suitable for simple 5V rail generation in space-constrained applications where low cost and simplicity are priorities.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\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>\n100mA<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n7.0V ~ 30V<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n1.7V (Typical) @ IOUT=40mA<\/td>\n<\/tr>\n
Output Voltage Accuracy<\/td>\n+\/-4% (A suffix)<\/td>\n<\/tr>\n
Line Regulation<\/td>\n0.2%\/V (Typical)<\/td>\n<\/tr>\n
Load Regulation<\/td>\n0.1%\/mA (Typical)<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n3.8mA (Typical)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8 (4.90 x 3.90mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C ~ +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Fixed 5V output requires no external resistors<\/li>\n
  • A-grade +\/-4% output voltage accuracy<\/li>\n
  • Internal thermal shutdown and short-circuit current limiting<\/li>\n
  • Output transistor safe-area compensation<\/li>\n
  • Wide input voltage range up to 30V<\/li>\n
  • Lead-free SOIC-8 package (R2G suffix)<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Microcontroller 5V supply rails<\/li>\n
    • Sensor power conditioning<\/li>\n
    • Relay and solenoid driver supplies<\/li>\n
    • Simple logic IC power<\/li>\n
    • General-purpose 5V bias generation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MC78L05ABDR2G from onsemi is a 5V fixed-output positive linear voltage regulator in an SOIC-8 package. It provides 100mA output current with an input voltage range of 7V to 30V, making it suitable for simple 5V rail generation in space-constrained applications where low cost and simplicity are priorities. Key Specifications Output Voltage 5.0V […]<\/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":[144],"class_list":["post-7028","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-on"],"acf":{"brief_explanation":"5V\/100mA fixed linear regulator, 7-30V input, +\/-4% accuracy, thermal shutdown in SOIC-8","date_code":"","package_case":"SOIC-8 (4.90 x 3.90 x 1.50 mm)","in_stock":6533,"datasheet":"https:\/\/www.onsemi.com\/download\/data-sheet\/pdf\/mc78l00a-d.pdf","price":"$0.25 @ 1ku","product_introduction":"The MC78L05ABDR2G from onsemi is a member of the MC78L00A series of fixed-output positive linear voltage regulators. It provides a regulated 5.0V output at up to 100mA from an input voltage of 7V to 30V. The A-grade version offers +\/-4% output voltage accuracy over the operating temperature range. Internal protection features include thermal shutdown, short-circuit current limiting, and output transistor safe-area compensation, making the device virtually indestructible. The SOIC-8 package provides a compact surface-mount alternative to the classic TO-92 through-hole package. The R2G suffix indicates lead-free tape and reel packaging. With only input and output bypass capacitors required, the MC78L05AB provides the simplest possible 5V regulation solution.","working_principle":"The MC78L05AB operates as a series-pass linear regulator using a bandgap voltage reference and error amplifier. The internal bandgap reference provides a stable 1.25V which is amplified and divided internally to produce the 5.0V output. The error amplifier continuously compares a fraction of the output voltage with the internal reference and adjusts the series pass transistor drive to maintain regulation. The dropout voltage (1.7V typical at 40mA) represents the minimum input-output differential required for regulation. The thermal shutdown circuit monitors junction temperature and disables the pass transistor when it exceeds approximately 150\u00b0C. The short-circuit current limiter restricts output current to a safe level when the output is shorted to ground. The quiescent current of 3.8mA flows through the device to ground regardless of load.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>OUTPUT<\/td>Regulated 5V output<\/td><\/tr>
      2<\/td>GROUND<\/td>Common ground<\/td><\/tr>
      3<\/td>INPUT<\/td>Unregulated input voltage (7V-30V)<\/td><\/tr>
      4-8<\/td>NC<\/td>No connect (SOIC-8 only)<\/td><\/tr><\/table>","application_scenarios":"
      • MCU 5V Supply Rail<\/b>: Simple 100mA 5V generation from 9V battery or 12V adapter for 5V microcontroller circuits<\/li>
      • Sensor Power Conditioning<\/b>: Provides clean 5V bias from noisy 12V\/24V industrial supply with internal thermal protection<\/li>
      • Relay Driver Supply<\/b>: Low-cost 5V generation for relay coil power in industrial control panels<\/li>
      • Logic IC Bias<\/b>: Direct 5V supply for CMOS\/TTL logic ICs with built-in short-circuit protection<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        MC78L05ACDR2G<\/td>onsemi<\/td>C-grade (+\/-8% accuracy, lower cost)<\/td><\/tr>
        L78L05ABUTR<\/td>ST<\/td>5V\/100mA, SOT-89 package<\/td><\/tr>
        LM78L05ACM<\/td>TI<\/td>5V\/100mA, SOIC-8<\/td><\/tr>
        KA78L05AMTF<\/td>onsemi\/Fairchild<\/td>5V\/100mA, TO-252 (DPAK)<\/td><\/tr>
        NCP551SN33T1G<\/td>onsemi<\/td>3.3V\/150mA LDO, low Iq, SOT-23-5<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/7028","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=7028"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/7028\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=7028"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=7028"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=7028"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}