{"id":6243,"date":"2026-06-12T10:03:26","date_gmt":"2026-06-12T10:03:26","guid":{"rendered":"https:\/\/materialparts.com\/l7805cd2t-tr\/"},"modified":"2026-06-12T10:03:26","modified_gmt":"2026-06-12T10:03:26","slug":"l7805cd2t-tr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/l7805cd2t-tr\/","title":{"rendered":"L7805CD2T-TR"},"content":{"rendered":"

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

The L7805CD2T-TR from STMicroelectronics is a positive voltage regulator providing a fixed 5V output at up to 1.5A. Part of the L78 series, it features thermal overload protection, short-circuit protection, and 2% output voltage tolerance in a D2PAK (TO-263) surface-mount package.<\/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\n\n\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n5V (fixed)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n1.5A (max)<\/td>\n<\/tr>\n
\u0646\u0637\u0627\u0642 \u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n7V to 35V<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062a\u0633\u0631\u0628<\/td>\n2V (typ at 1A)<\/td>\n<\/tr>\n
Line Regulation<\/td>\n100 mV (typ)<\/td>\n<\/tr>\n
Load Regulation<\/td>\n100 mV (typ)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u0647\u062f\u0626\u0629<\/td>\n8 mA (typ)<\/td>\n<\/tr>\n
Ripple Rejection<\/td>\n62 dB (typ)<\/td>\n<\/tr>\n
Output Voltage Tolerance<\/td>\n+\/-2%<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n0 to 125 C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nD2PAK (TO-263-3)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 1.5A output current capability<\/li>\n
  • Thermal overload and short-circuit protection<\/li>\n
  • 2% output voltage accuracy over temperature<\/li>\n
  • Internal current limiting and safe operating area<\/li>\n
  • No external components required for basic operation<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • 5V logic power supply regulation<\/li>\n
    • Microcontroller and digital IC power<\/li>\n
    • Post-regulation for switching supplies<\/li>\n
    • Battery-powered equipment power management<\/li>\n
    • Industrial control system power rails<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The L7805CD2T-TR from STMicroelectronics is a positive voltage regulator providing a fixed 5V output at up to 1.5A. Part of the L78 series, it features thermal overload protection, short-circuit protection, and 2% output voltage tolerance in a D2PAK (TO-263) surface-mount package. Key Specifications Output Voltage 5V (fixed) Output Current 1.5A (max) Input Voltage […]<\/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-6243","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-st"],"acf":{"brief_explanation":"Fixed 5V 1.5A positive linear voltage regulator with thermal protection in D2PAK","date_code":"","package_case":"D2PAK (TO-263-3, 10.4 x 9.35 x 4.6mm)","in_stock":3679,"datasheet":"https:\/\/www.st.com\/resource\/en\/datasheet\/l78.pdf","price":"$0.35 @ 1ku","product_introduction":"The L7805CD2T-TR from STMicroelectronics is a fixed 5V positive voltage regulator from the industry-standard L78 series. Capable of delivering up to 1.5A of output current, it features internal thermal shutdown, current limiting, and safe operating area protection. The device requires only two external bypass capacitors for stable operation and provides +\/-2% output voltage accuracy. The D2PAK surface-mount package offers excellent thermal dissipation characteristics, making it suitable for a wide range of power regulation applications.","working_principle":"The L7805CD2T-TR operates as a series linear voltage regulator using a feedback control loop. **Reference Subsystem**: A temperature-compensated bandgap reference generates a stable internal voltage that sets the 5V output. **Error Amplifier**: A differential amplifier compares a fraction of the output voltage (via internal resistor divider) against the reference. The error signal drives the series pass transistor to maintain regulation. **Pass Transistor**: A power Darlington transistor operates in its linear region, dropping the excess input voltage as heat. The dropout voltage of 2V means the input must be at least 7V for guaranteed 5V output. **Protection Subsystem**: Thermal shutdown activates when junction temperature exceeds approximately 150C, disabling the pass transistor. Current limiting restricts output current during overload. Short-circuit protection reduces both current and power dissipation during fault conditions.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>INPUT<\/td>Unregulated input voltage (7V to 35V)<\/td><\/tr>
      2<\/td>GND<\/td>Common ground (connected to tab)<\/td><\/tr>
      3<\/td>OUTPUT<\/td>Regulated 5V output<\/td><\/tr>
      Tab<\/td>GND\/Heatsink<\/td>Thermal pad, electrically connected to Pin 2 (GND)<\/td><\/tr><\/table>","application_scenarios":"
      • Digital Logic Power: Regulating 9V-12V wall adapter to 5V for TTL and CMOS logic circuits<\/li>
      • Microcontroller Supply: Stable 5V rail for Arduino, PIC, and AVR-based embedded systems<\/li>
      • Industrial Controls: Post-regulation of 24V industrial supplies to 5V for sensor and MCU power<\/li>
      • Battery Systems: Converting 9V or 12V battery to regulated 5V for portable equipment<\/li>
      • Audio Pre-regulation: Clean 5V supply for low-noise analog front-end circuits<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        LM7805CT<\/td>TI\/NSC<\/td>TO-220 through-hole equivalent<\/td><\/tr>
        MC7805CD2T<\/td>onsemi<\/td>Pin-compatible, same D2PAK<\/td><\/tr>
        LM1086CT-5.0<\/td>TI<\/td>1.5A, 1.3V dropout, lower quiescent<\/td><\/tr>
        AMS1117-5.0<\/td>AMS<\/td>1A, 1.1V dropout, SOT-223<\/td><\/tr>
        AP2112K-5.0<\/td>Diodes Inc<\/td>600mA, 250mV dropout, SOT-23-5<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6243","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=6243"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6243\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6243"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6243"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}