{"id":2435,"date":"2026-05-20T03:57:28","date_gmt":"2026-05-20T03:57:28","guid":{"rendered":"https:\/\/materialparts.com\/lm1117mpx-5-0-nopb\/"},"modified":"2026-05-20T03:57:28","modified_gmt":"2026-05-20T03:57:28","slug":"lm1117mpx-5-0-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm1117mpx-5-0-nopb\/","title":{"rendered":"LM1117MPX-5.0\/NOPB"},"content":{"rendered":"

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

The LM1117MPX-5.0\/NOPB from Texas Instruments is an 800mA low-dropout (LDO) linear voltage regulator with a fixed 5.0V output. It features a dropout voltage of 1.2V at full load, current limiting and thermal shutdown protection, and +\/-1% output voltage accuracy, housed in a compact SOT-223 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u5236\u9020\u5546<\/td>\n\u5fb7\u5dde\u4eea\u5668<\/td>\n<\/tr>\n
Output Voltage<\/td>\n5.0V (fixed)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n800mA<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n1.2V @ 800mA<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n6.5V ~ 15V<\/td>\n<\/tr>\n
Line Regulation<\/td>\n0.2% (max)<\/td>\n<\/tr>\n
Load Regulation<\/td>\n0.4% (max)<\/td>\n<\/tr>\n
Accuracy<\/td>\n+\/-1%<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-223-4<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0\u00b0C ~ 125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 800mA output current capability<\/li>\n
  • Low dropout voltage: 1.2V at 800mA<\/li>\n
  • Fixed 5.0V output with +\/-1% accuracy<\/li>\n
  • Zener-trimmed bandgap reference<\/li>\n
  • Internal current limiting and thermal shutdown<\/li>\n
  • Minimum 10uF output capacitor required (tantalum)<\/li>\n
  • Available in SOT-223 and WSON packages<\/li>\n
  • Line regulation: 0.2% max, Load regulation: 0.4% max<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 5V power supply regulation from 6.5V-15V sources<\/li>\n
    • Post-regulation for switching power supplies<\/li>\n
    • Battery-powered instruments<\/li>\n
    • Embedded system power rails<\/li>\n
    • PC add-in cards<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM1117MPX-5.0\/NOPB from Texas Instruments is an 800mA low-dropout (LDO) linear voltage regulator with a fixed 5.0V output. It features a dropout voltage of 1.2V at full load, current limiting and thermal shutdown protection, and +\/-1% output voltage accuracy, housed in a compact SOT-223 package. Key Specifications Manufacturer Texas Instruments Output Voltage 5.0V […]<\/p>\n","protected":false},"author":2,"featured_media":2868,"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-2435","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":"800mA LDO regulator, 5.0V fixed output, 1.2V dropout, +\/-1% accuracy, SOT-223 package","date_code":"","package_case":"SOT-223-4 (6.5 x 3.5 x 1.8 mm)","in_stock":9815,"datasheet":"https:\/\/www.ti.com\/product\/LM1117","price":"$0.35 @ 1ku","product_introduction":"The Texas Instruments LM1117MPX-5.0\/NOPB is a low-dropout linear voltage regulator capable of supplying 800mA of output current at a fixed 5.0V. The device features a dropout voltage of only 1.2V at full load current, making it suitable for applications where the input-to-output differential is small. A Zener-trimmed bandgap reference ensures output voltage accuracy of +\/-1% over line, load, and temperature. The regulator includes internal current limiting and thermal shutdown protection, safeguarding the device against overload and fault conditions. The SOT-223 surface-mount package provides an efficient thermal path, and a minimum 10uF tantalum output capacitor is required for stability and transient response improvement.","working_principle":"The LM1117 operates as a series-pass linear regulator with three key functional blocks: 1) Bandgap Reference: A Zener-trimmed bandgap voltage reference generates a precise internal reference voltage that is compared against a fraction of the output voltage. This trimming ensures +\/-1% initial accuracy. 2) Error Amplifier: The error amplifier continuously compares the feedback voltage with the reference and drives the pass transistor to maintain regulation. The loop compensation is designed for stability with a minimum 10uF output capacitor. 3) Protection Circuits: Current limiting protects the pass element from excessive current, while the thermal shutdown circuit disables the output when the junction temperature exceeds approximately 160\u00b0C, preventing device damage from overheating.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND\/ADJ<\/td>Ground<\/td>Ground terminal (fixed version); Adjust for adjustable version<\/td><\/tr>
      2<\/td>VOUT<\/td>Output<\/td>Regulated 5.0V output; internally connected to tab<\/td><\/tr>
      3<\/td>VIN<\/td>Input<\/td>Unregulated input voltage (6.5V to 15V)<\/td><\/tr>
      4<\/td>TAB<\/td>Output<\/td>Tab connected to VOUT for heat dissipation<\/td><\/tr><\/table>","application_scenarios":"
      • 5V power regulation from 6.5V-15V input rails in embedded systems<\/li>
      • Post-regulation after switching converters for noise-sensitive analog circuits<\/li>
      • Battery-powered instruments requiring stable 5V supply<\/li>
      • PC add-in cards and peripheral power management<\/li>
      • Industrial control systems with 12V or 9V input sources<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM1117IMPX-5.0\/NOPB<\/td>SOT-223<\/td>Industrial temp -40C to 125C<\/td><\/tr>
        TI<\/td>TLV1117LV50DCYR<\/td>SOT-223<\/td>Lower dropout, newer alternative<\/td><\/tr>
        TI<\/td>TLV76150DCYR<\/td>SOT-223<\/td>Improved LDO, direct drop-in<\/td><\/tr>
        onsemi<\/td>NCP1117ST50T3G<\/td>SOT-223<\/td>1A output, 5V fixed<\/td><\/tr>
        Microchip<\/td>MCP1825-5002E\/DB<\/td>SOT-223<\/td>500mA, low Iq<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2435","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=2435"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2435\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2868"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2435"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}