{"id":2544,"date":"2026-05-23T06:10:44","date_gmt":"2026-05-23T06:10:44","guid":{"rendered":"https:\/\/materialparts.com\/lm1117mpx-3-3-nopb\/"},"modified":"2026-05-23T06:10:44","modified_gmt":"2026-05-23T06:10:44","slug":"lm1117mpx-3-3-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/lm1117mpx-3-3-nopb\/","title":{"rendered":"LM1117MPX-3.3\/NOPB"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The LM1117MPX-3.3\/NOPB from Texas Instruments is an 800mA low-dropout linear regulator with a fixed 3.3V output in a SOT-223 surface-mount package. Featuring 1.2V dropout at 800mA and +\/-1% output accuracy, it is widely used for point-of-load regulation in digital systems.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n3.3V (fixed)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n800mA<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062a\u0633\u0631\u0628<\/td>\n1.2V @ 800mA<\/td>\n<\/tr>\n
Input Voltage Max<\/td>\n15V<\/td>\n<\/tr>\n
\u062f\u0642\u0629 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n+\/-1%<\/td>\n<\/tr>\n
Line Regulation<\/td>\n0.2% max<\/td>\n<\/tr>\n
Load Regulation<\/td>\n0.4% max<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n0\u00b0C ~ 125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 800mA output current capability<\/li>\n
  • 1.2V dropout at full load<\/li>\n
  • +\/-1% output voltage accuracy<\/li>\n
  • Current limiting and thermal shutdown<\/li>\n
  • Zener-trimmed bandgap reference<\/li>\n
  • SOT-223 space-saving package<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • 3.3V point-of-load regulation<\/li>\n
    • FPGA and CPLD core power<\/li>\n
    • Post-regulation after DC-DC converters<\/li>\n
    • Instrumentation and test equipment<\/li>\n
    • Embedded system power supplies<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM1117MPX-3.3\/NOPB from Texas Instruments is an 800mA low-dropout linear regulator with a fixed 3.3V output in a SOT-223 surface-mount package. Featuring 1.2V dropout at 800mA and +\/-1% output accuracy, it is widely used for point-of-load regulation in digital systems. Key Specifications Output Voltage 3.3V (fixed) Output Current 800mA Dropout Voltage 1.2V @ […]<\/p>\n","protected":false},"author":2,"featured_media":2572,"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-2544","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, 3.3V fixed, 1.2V dropout, SOT-223, +\/-1% accuracy","date_code":"","package_case":"SOT-223-4 (6.7 x 3.7 x 1.7 mm)","in_stock":9540,"datasheet":"https:\/\/www.ti.com\/product\/LM1117","price":"$0.82 @ 1ku","product_introduction":"The LM1117MPX-3.3\/NOPB is an 800mA low-dropout linear regulator from Texas Instruments, providing a fixed 3.3V output with +\/-1% accuracy ensured by a Zener-trimmed bandgap reference. The 1.2V dropout voltage at 800mA allows operation with minimal headroom, while the wide input range (up to 15V) provides flexibility in power supply design. Built-in current limiting and thermal shutdown protect both the device and the load. The SOT-223 package offers a compact footprint with adequate thermal performance for moderate dissipation applications.","working_principle":"The LM1117 uses a PNP pass element to achieve low dropout voltage. An error amplifier compares a divided-down version of the output voltage with an internal bandgap reference (trimmed by Zener zapping for +\/-1% accuracy). The amplifier drives the PNP pass transistor base to regulate the output. When the input-output differential falls below the dropout voltage, the PNP saturates and output tracks input minus Vdropout. Current limiting activates when load current exceeds the safe operating area, and thermal shutdown disables the output when junction temperature exceeds approximately 160C.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND\/ADJ<\/td>Ground<\/td>Ground (fixed version)<\/td><\/tr>
      2<\/td>VOUT<\/td>Output<\/td>Regulated 3.3V output<\/td><\/tr>
      3<\/td>VIN<\/td>Input<\/td>Input voltage (up to 15V)<\/td><\/tr>
      4<\/td>VOUT (Tab)<\/td>Output<\/td>Output \/ Heatsink tab<\/td><\/tr><\/table>","application_scenarios":"
      • 3.3V rail generation from 5V supply in digital systems<\/li>
      • FPGA\/CPLD I\/O power regulation<\/li>
      • Post-regulation after switching converters for noise-sensitive loads<\/li>
      • Embedded processor and peripheral power<\/li>
      • Battery-powered device regulation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TLV1117LV33DCYR<\/td>SOT-223<\/td>Lower dropout, newer alternative<\/td><\/tr>
        onsemi<\/td>NCP1117ST33T3G<\/td>SOT-223<\/td>Pin-compatible, 800mA<\/td><\/tr>
        Microchip<\/td>TC2117-3.3VDBTR<\/td>SOT-223<\/td>800mA, low Iq<\/td><\/tr>
        Diodes Inc<\/td>AZ1117CH-3.3TRG1<\/td>SOT-223<\/td>1A, 3.3V LDO<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2544","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=2544"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2544\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media\/2572"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=2544"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=2544"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=2544"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=2544"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}