{"id":3694,"date":"2026-06-08T02:02:20","date_gmt":"2026-06-08T02:02:20","guid":{"rendered":"https:\/\/materialparts.com\/tps74401rgwr\/"},"modified":"2026-06-08T02:02:20","modified_gmt":"2026-06-08T02:02:20","slug":"tps74401rgwr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tps74401rgwr\/","title":{"rendered":"TPS74401RGWR"},"content":{"rendered":"

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

The TPS74401RGWR from Texas Instruments is a 3.0A ultra-low-dropout (LDO) linear regulator with programmable soft-start. It features an adjustable output from 0.8V to 3.6V, 115mV dropout at 3A, and +\/-1% accuracy over line, load, and temperature in a 20-pin VQFN 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
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n3A<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n0.8V to 3.6V (adjustable)<\/td>\n<\/tr>\n
\u0646\u0637\u0627\u0642 \u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n1.1V to 5.5V<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062a\u0633\u0631\u0628<\/td>\n115mV (typ @ 3A)<\/td>\n<\/tr>\n
Accuracy<\/td>\n+\/-1% over line, load, temperature<\/td>\n<\/tr>\n
PSRRR<\/td>\n50dB @ 100kHz<\/td>\n<\/tr>\n
\u0636\u0648\u0636\u0627\u0621 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n13uVRMS<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 to 125 C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Programmable monotonic soft-start<\/li>\n
  • Ultra-low dropout of 115mV at 3A<\/li>\n
  • +\/-1% accuracy over all conditions<\/li>\n
  • Cap-free or ceramic output capacitor stability<\/li>\n
  • Power-good output (open drain)<\/li>\n
  • Enable input for power sequencing<\/li>\n
  • \u0627\u0644\u062d\u062f \u0627\u0644\u062d\u0627\u0644\u064a \u0648\u0627\u0644\u0625\u064a\u0642\u0627\u0641 \u0627\u0644\u062d\u0631\u0627\u0631\u064a<\/li>\n
  • Bias input for low VIN operation down to 0.9V<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • FPGA core and I\/O voltage regulation<\/li>\n
    • DSP and ASIC power supplies<\/li>\n
    • Post-regulation for DC\/DC converters<\/li>\n
    • Hot-swap and inrush current control<\/li>\n
    • Telecom and networking equipment<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS74401RGWR from Texas Instruments is a 3.0A ultra-low-dropout (LDO) linear regulator with programmable soft-start. It features an adjustable output from 0.8V to 3.6V, 115mV dropout at 3A, and +\/-1% accuracy over line, load, and temperature in a 20-pin VQFN package. Key Specifications Output Current 3A Output Voltage 0.8V to 3.6V (adjustable) Input […]<\/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":[138],"class_list":["post-3694","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"3A ultra-LDO, adjustable 0.8-3.6V, 115mV dropout, prog soft-start, VQFN-20","date_code":"","package_case":"VQFN-20 (5.0 x 5.0 x 1.0 mm)","in_stock":13153,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps74401.pdf","price":"$1.50 @ 1ku","product_introduction":"The TPS74401RGWR from Texas Instruments is a 3.0A ultra-low-dropout linear regulator with programmable soft-start, designed for powering FPGAs, DSPs, and ASICs with stringent startup requirements. The device features an adjustable output voltage from 0.8V to 3.6V with +\/-1% accuracy across line, load, and temperature. The ultra-low dropout voltage of 115mV at 3A enables efficient operation even with small input-to-output voltage differences. A key feature is the programmable, monotonic soft-start that eliminates power-up initialization problems by controlling the output voltage ramp, reducing inrush current, and minimizing input bus transients. The device is stable with any output capacitor type or value, including capacitor-free operation. An enable input and power-good output facilitate power sequencing. With a BIAS input, the device can support input voltages as low as 0.9V. The TPS74401RGWR is available in a 20-pin VQFN package rated for -40 to 125 C operation.","working_principle":"The TPS74401RGWR operates as a high-current LDO with advanced control features. Key subsystems include: (1) Error Amplifier - compares the feedback voltage with a precision 0.8V reference and drives the pass element to maintain regulation; (2) NMOS Pass Element - an N-channel MOSFET provides low dropout operation with fast transient response; (3) Soft-Start Control - an external capacitor on the SS pin programs the output voltage ramp rate; the error amplifier tracks the soft-start ramp until it exceeds the internal reference, ensuring monotonic startup; (4) Bias Regulator - a separate BIAS input powers the internal circuitry, allowing VIN to go as low as 0.9V while maintaining regulation; (5) Protection Circuitry - includes current limiting with foldback, thermal shutdown, and reverse current protection; (6) Power Good - an open-drain comparator monitors the output voltage.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1-4<\/td>OUT<\/td>Output<\/td>Regulated output voltage<\/td><\/tr>
      5<\/td>SS<\/td>Input<\/td>Soft-start capacitor connection<\/td><\/tr>
      6<\/td>PGOOD<\/td>Output<\/td>Power good open-drain output<\/td><\/tr>
      7<\/td>FB<\/td>Input<\/td>Feedback voltage input<\/td><\/tr>
      8<\/td>EN<\/td>Input<\/td>Enable input (active high)<\/td><\/tr>
      9-12<\/td>IN<\/td>Power<\/td>Input voltage supply<\/td><\/tr>
      13<\/td>BIAS<\/td>Power<\/td>Bias supply input for internal circuitry<\/td><\/tr>
      14-17<\/td>GND<\/td>Ground<\/td>Ground connections (thermal pad)<\/td><\/tr>
      18-20<\/td>NC<\/td>Unused<\/td>No connect<\/td><\/tr><\/table>","application_scenarios":"
      • FPGA core and I\/O voltage regulation with controlled startup<\/li>
      • DSP and ASIC power with specific sequencing requirements<\/li>
      • Post-regulation for switching converters with noise-sensitive loads<\/li>
      • Hot-swap power supply with inrush current limiting<\/li>
      • Telecom and networking equipment power rails<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Texas Instruments<\/td>TPS7A4500DCQR<\/td>TO-263-7<\/td>3A LDO, 20V input<\/td><\/tr>
        Analog Devices<\/td>LT3083ETS8#PBF<\/td>SOT-223-8<\/td>3A, parallelable LDO<\/td><\/tr>
        Microchip<\/td>MIC39301-1.8WU-TR<\/td>TO-263-5<\/td>3A, 1.8V fixed, LDO<\/td><\/tr>
        ON Semiconductor<\/td>NCP59302MN33TYG<\/td>DFN-8<\/td>3A, 3.3V, automotive<\/td><\/tr>
        Maxim Integrated<\/td>MAX8792ETJ+<\/td>TQFN-32<\/td>3A, DDR termination<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3694","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=3694"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3694\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3694"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3694"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}