{"id":2447,"date":"2026-05-20T04:47:56","date_gmt":"2026-05-20T04:47:56","guid":{"rendered":"https:\/\/materialparts.com\/ld1117s50ctr\/"},"modified":"2026-05-20T04:47:56","modified_gmt":"2026-05-20T04:47:56","slug":"ld1117s50ctr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/ld1117s50ctr\/","title":{"rendered":"LD1117S50CTR"},"content":{"rendered":"

Productos<\/h2>\n

The LD1117S50CTR from STMicroelectronics is a low-drop positive voltage regulator providing a fixed 5.0V output at up to 800mA. It features 1V typical dropout voltage, +-1% output accuracy at 25C, 75dB supply voltage rejection, and NPN pass transistor for high efficiency, in a SOT-223 surface-mount package.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Fabricante<\/td>\nSTMicroelectronics<\/td>\n<\/tr>\n
Output Voltage<\/td>\n5.0V (fixed)<\/td>\n<\/tr>\n
Corriente de salida<\/td>\n800mA<\/td>\n<\/tr>\n
Input Voltage Range<\/td>\n6.5V to 15V<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n1.0V typ, 1.2V max @ 800mA<\/td>\n<\/tr>\n
Output Accuracy<\/td>\n+-1% at 25C<\/td>\n<\/tr>\n
Corriente de reposo<\/td>\n5mA typ (into load)<\/td>\n<\/tr>\n
PSRR<\/td>\n75dB typ @ 120Hz<\/td>\n<\/tr>\n
Output Noise<\/td>\n100uVrms (10Hz-10kHz)<\/td>\n<\/tr>\n
Paquete<\/td>\nSOT-223-4<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n0C to +125C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Low dropout voltage: 1V typical at 800mA<\/li>\n
  • Output current up to 800mA (1.3A peak)<\/li>\n
  • Fixed 5.0V output with +-1% accuracy at 25C<\/li>\n
  • NPN pass transistor for high efficiency<\/li>\n
  • Supply voltage rejection: 75dB typical<\/li>\n
  • Internal current limiting and thermal shutdown<\/li>\n
  • Only 10uF output capacitor required for stability<\/li>\n
  • Available in +-1% and +-2% tolerance grades<\/li>\n
  • Pin-compatible with standard 1117 regulators<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • 5V power supply regulation<\/li>\n
    • Battery-powered equipment<\/li>\n
    • Post-regulation for switching supplies<\/li>\n
    • Embedded system power rails<\/li>\n
    • Consumer electronics<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LD1117S50CTR from STMicroelectronics is a low-drop positive voltage regulator providing a fixed 5.0V output at up to 800mA. It features 1V typical dropout voltage, +-1% output accuracy at 25C, 75dB supply voltage rejection, and NPN pass transistor for high efficiency, in a SOT-223 surface-mount package. Key Specifications Manufacturer STMicroelectronics Output Voltage 5.0V […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[142],"class_list":["post-2447","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-st"],"acf":{"brief_explanation":"800mA LDO, 5.0V fixed, 1V dropout, +-1% accuracy, 75dB PSRR, SOT-223","date_code":"","package_case":"SOT-223-4 (6.5 x 3.5 x 1.8 mm)","in_stock":13200,"datasheet":"https:\/\/www.st.com\/en\/power-management\/ld1117.html","price":"$0.18 @ 1ku","product_introduction":"The STMicroelectronics LD1117S50CTR is a low-drop positive voltage regulator capable of providing up to 800mA of output current at a fixed 5.0V. The NPN pass transistor ensures high efficiency since the quiescent current flows mostly into the load, unlike PNP-based LDOs. The on-chip trimming allows the regulator to achieve very tight output voltage tolerance of +-1% at 25C. With a typical dropout voltage of only 1V at 800mA, the LD1117 is suitable for applications where the input-to-output voltage differential is limited. A minimum 10uF output capacitor is required for stability. The device includes internal current limiting and thermal shutdown protection for reliable operation.","working_principle":"The LD1117S50CTR operates as a series-pass linear regulator using an NPN pass transistor topology: 1) Reference and Error Amplifier: A bandgap voltage reference generates a stable internal reference voltage. The error amplifier continuously compares the output feedback with this reference and drives the NPN pass transistor to maintain the output at 5.0V. 2) NPN Pass Element: Unlike PNP-based LDOs, the NPN pass transistor draws its base current from the input supply, and the quiescent current flows into the load rather than to ground. This results in higher efficiency, especially at lighter loads. The dropout voltage is determined by the VCE(sat) of the NPN transistor, typically 1V at 800mA. 3) Protection: Internal current limiting prevents excessive output current, and thermal shutdown protects the device from overheating during fault conditions.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND\/ADJ<\/td>Ground<\/td>Ground terminal (fixed 5V 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 (Tab)<\/td>VOUT<\/td>Output<\/td>Thermal tab connected to VOUT<\/td><\/tr><\/table>","application_scenarios":"
      • 5V power regulation from 6.5V-15V sources in embedded systems<\/li>
      • Post-regulation after switching converters for low-noise 5V rails<\/li>
      • Battery-powered equipment requiring efficient 5V regulation<\/li>
      • Consumer electronics and computer peripheral power supplies<\/li>
      • Industrial control systems with 9V or 12V input sources<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ST<\/td>LDL1117S50R<\/td>SOT-223<\/td>Newer, 1.2A, higher PSRR version<\/td><\/tr>
        TI<\/td>LM1117MPX-5.0\/NOPB<\/td>SOT-223<\/td>800mA, 5V, +-1% accuracy<\/td><\/tr>
        onsemi<\/td>NCP1117ST50T3G<\/td>SOT-223<\/td>1A, 5V LDO<\/td><\/tr>
        TI<\/td>TLV1117LV50DCYR<\/td>SOT-223<\/td>1.5A, lower Iq, newer<\/td><\/tr>
        Microchip<\/td>MCP1825S-5002E\/DB<\/td>SOT-223<\/td>500mA, 5V, low Iq<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/2447","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=2447"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/2447\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=2447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=2447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=2447"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=2447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}