{"id":7173,"date":"2026-06-23T06:01:19","date_gmt":"2026-06-23T06:01:19","guid":{"rendered":"https:\/\/materialparts.com\/tps7a9101dskr\/"},"modified":"2026-06-23T06:01:19","modified_gmt":"2026-06-23T06:01:19","slug":"tps7a9101dskr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tps7a9101dskr\/","title":{"rendered":"TPS7A9101DSKR"},"content":{"rendered":"

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

The TPS7A9101DSKR from Texas Instruments is a 1A, ultra-low-noise (4.7uVrms), high-PSRR LDO regulator in a WSON-10 package. With adjustable output from 0.8V to 5.2V and 200mV max dropout at 1A, it powers noise-sensitive RF, ADC, and FPGA circuits.<\/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
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n1 A<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n0.8 V to 5.2 V (adjustable)<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n1.4 V to 6.5 V<\/td>\n<\/tr>\n
\u0636\u0648\u0636\u0627\u0621 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n4.7 uVrms (10Hz-100kHz)<\/td>\n<\/tr>\n
PSRRR<\/td>\n70 dB at DC, 40 dB at 1MHz<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062a\u0633\u0631\u0628<\/td>\n200 mV (max at 1A)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40C to +125C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 4.7uVrms ultra-low output noise for sensitive analog circuits<\/li>\n
  • 70dB DC PSRR and 40dB at 1MHz for power rail filtering<\/li>\n
  • 1% accuracy over line, load, and temperature<\/li>\n
  • 200mV max dropout at 1A for efficient regulation<\/li>\n
  • Adjustable soft-start for in-rush current control<\/li>\n
  • Open-drain power-good (PG) output for supply monitoring<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • VCO, ADC, and DAC power supply for minimal phase noise<\/li>\n
    • RF transceiver and PLL clean power rails<\/li>\n
    • FPGA and SerDes core\/IO voltage regulation<\/li>\n
    • Medical imaging and test instrumentation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS7A9101DSKR from Texas Instruments is a 1A, ultra-low-noise (4.7uVrms), high-PSRR LDO regulator in a WSON-10 package. With adjustable output from 0.8V to 5.2V and 200mV max dropout at 1A, it powers noise-sensitive RF, ADC, and FPGA circuits. Key Specifications Output Current 1 A Output Voltage 0.8 V to 5.2 V (adjustable) Input […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,32],"tags":[],"chip_brand":[138],"class_list":["post-7173","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-ti"],"acf":{"brief_explanation":"1A LDO, 4.7uVrms noise, 70dB PSRR, 0.8-5.2V adj, 200mV dropout, WSON-10, RF\/analog power","date_code":"","package_case":"WSON-10 (2.50 x 2.50 x 0.80 mm, exposed pad)","in_stock":10024,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps7a91.pdf","price":"$0.87 @ 1ku","product_introduction":"The TPS7A9101DSKR from Texas Instruments is a 1A, high-accuracy, ultra-low-noise, low-dropout (LDO) voltage regulator in a WSON-10 (2.5mm x 2.5mm) package. The output voltage is adjustable from 0.8V to 5.2V using external resistors, with 1% accuracy over line, load, and temperature. The device features 4.7uVrms output noise (10Hz-100kHz) and 70dB PSRR at DC, making it ideal for powering noise-sensitive components such as VCOs, ADCs, DACs, and RF transceivers where minimal phase noise and clock jitter are critical. The wideband PSRR of 40dB at 1MHz effectively filters high-frequency switching regulator ripple. The maximum dropout voltage of 200mV at 1A enables efficient regulation from low-headroom supplies. An adjustable soft-start feature with selectable charging current controls in-rush current during startup. The open-drain power-good (PG) output provides supply monitoring for downstream circuitry.","working_principle":"The TPS7A9101DSKR uses a PMOS pass element with advanced BiCMOS error amplifier for ultra-low-noise regulation. (1) Pass Element: A P-channel MOSFET provides the low 200mV dropout at 1A. The PMOS gate is driven by a high-gain error amplifier that compares a fraction of the output voltage to an internal 0.8V bandgap reference. (2) Noise Reduction: An external capacitor (CNR\/SS) on the NR\/SS pin filters the bandgap reference noise, reducing the output noise from approximately 12uVrms (without CNR) to 4.7uVrms (with 100nF CNR). This is critical for achieving sub-5uVrms noise performance. (3) PSRR: The high loop gain of the error amplifier provides 70dB PSRR at DC. The wideband PSRR of 40dB at 1MHz is achieved by the high bandwidth of the regulation loop. A feed-forward capacitor (CFF) across the top feedback resistor further improves high-frequency PSRR. (4) Soft-Start: The NR\/SS pin also serves as the soft-start control. The external capacitor controls the reference voltage ramp-up rate, limiting in-rush current. (5) PG: The open-drain power-good output asserts when the output voltage reaches 90% of the target value.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>OUT<\/td>Output<\/td>Regulated output voltage<\/td><\/tr>
      2<\/td>OUT<\/td>Output<\/td>Regulated output voltage<\/td><\/tr>
      3<\/td>PG<\/td>Output<\/td>Power-good (open-drain)<\/td><\/tr>
      4<\/td>SS_CTRL<\/td>Input<\/td>Soft-start current select (GND=fast, float=slow)<\/td><\/tr>
      5<\/td>EN<\/td>Input<\/td>Enable (active high)<\/td><\/tr>
      6<\/td>NR\/SS<\/td>Analog<\/td>Noise reduction \/ soft-start capacitor<\/td><\/tr>
      7<\/td>FB<\/td>Input<\/td>Feedback voltage (0.8V reference)<\/td><\/tr>
      8<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      9<\/td>IN<\/td>Input<\/td>Input supply (1.4-6.5V)<\/td><\/tr>
      10<\/td>IN<\/td>Input<\/td>Input supply (1.4-6.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • VCO, ADC, and DAC power supply with 4.7uVrms noise for minimal phase noise<\/li>
      • RF transceiver and PLL clean power rails with 70dB PSRR at DC<\/li>
      • FPGA and SerDes core\/IO voltage regulation at 1A with 200mV dropout<\/li>
      • Medical imaging and test instrumentation with 1% output accuracy<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TPS7A9101DSKT<\/td>WSON-10<\/td>Small reel packaging<\/td><\/tr>
        TI<\/td>TPS7A8101SKDR<\/td>SON-8<\/td>1A, 23.5uVrms noise<\/td><\/tr>
        ADI<\/td>LT3045EMSE-1#PBF<\/td>MSOP-10<\/td>500mA, 0.8uVrms noise<\/td><\/tr>
        TI<\/td>TPS7A4700RGWR<\/td>VQFN-20<\/td>1A, 3.8uVrms, higher PSRR<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7173","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=7173"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7173\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=7173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=7173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=7173"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7173"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}