{"id":9964,"date":"2026-07-08T07:37:22","date_gmt":"2026-07-08T07:37:22","guid":{"rendered":"https:\/\/materialparts.com\/rt9193-33gb-2\/"},"modified":"2026-07-08T07:37:22","modified_gmt":"2026-07-08T07:37:22","slug":"rt9193-33gb-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/rt9193-33gb-2\/","title":{"rendered":"RT9193-33GB"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The Richtek RT9193-33GB is a 300mA ultra-low-noise CMOS LDO regulator providing a fixed 3.3V output in SOT-23-5 package. Featuring 220mV dropout at 300mA, 90uA quiescent current, and a noise bypass pin for further noise reduction, it is optimized for portable RF and wireless applications demanding clean power supply.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Output Voltage<\/td>\n3.3V (fixed)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n300mA<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n2.5V to 5.5V<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n220mV @ 300mA<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n90uA (typical)<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n<0.01uA<\/td>\n<\/tr>\n
Output Noise<\/td>\nUltra-low (with BP cap)<\/td>\n<\/tr>\n
PSRR<\/td>\nHigh (with BP cap)<\/td>\n<\/tr>\n
Accuracy<\/td>\n\u00b12%<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-5<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
Status<\/td>\nLast Time Buy<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Ultra-low noise for RF applications<\/li>\n
  • Noise bypass pin for further noise reduction<\/li>\n
  • 220mV low dropout at 300mA<\/li>\n
  • 90uA quiescent current<\/li>\n
  • <0.01uA shutdown current<\/li>\n
  • 50us fast startup<\/li>\n
  • Stable with 1uF ceramic output<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • RF module power supply<\/li>\n
    • Wireless handset clean power<\/li>\n
    • Audio codec supply<\/li>\n
    • ADC\/DAC reference supply<\/li>\n
    • Portable communications<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The Richtek RT9193-33GB is a 300mA ultra-low-noise CMOS LDO regulator providing a fixed 3.3V output in SOT-23-5 package. Featuring 220mV dropout at 300mA, 90uA quiescent current, and a noise bypass pin for further noise reduction, it is optimized for portable RF and wireless applications demanding clean power supply. Key Specifications Output Voltage 3.3V […]<\/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":[1260],"chip_brand":[203],"class_list":["post-9964","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","tag-rt9193-33gb","chip_brand-richtek"],"acf":{"brief_explanation":"300mA LDO, 3.3V, 220mV dropout, ultra-low noise, BP pin, SOT-23-5, Richtek RT9193","date_code":"","package_case":"SOT-23-5 (2.9 x 1.6 x 1.15mm)","in_stock":5312,"datasheet":"https:\/\/www.richtek.com\/assets\/product_unit\/DS9193-18.pdf","price":"$0.20 @ 1ku","product_introduction":"The Richtek RT9193-33GB is a 300mA ultra-low-noise CMOS LDO providing a fixed 3.3V output with 220mV dropout. The noise bypass (BP) pin allows an external capacitor to filter the internal reference voltage, achieving ultra-low output noise ideal for RF modules, audio codecs, and precision analog circuits. Note: This product is in Last Time Buy status.","working_principle":"The RT9193-33GB uses a P-channel MOSFET pass element in a CMOS LDO configuration. The internal bandgap reference provides the \u00b12% output accuracy. The BP (bypass) pin is connected to the reference voltage node, allowing an external capacitor (typically 22nF) to filter reference noise. This dramatically reduces output noise and improves PSRR, especially at higher frequencies. The 90uA quiescent current is achieved through careful bias circuit design while maintaining noise and PSRR performance.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VIN<\/td>Input<\/td>Input supply (2.5-5.5V)<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      3<\/td>EN<\/td>Input<\/td>Enable (active high)<\/td><\/tr>
      4<\/td>BP<\/td>I\/O<\/td>Noise bypass capacitor<\/td><\/tr>
      5<\/td>VOUT<\/td>Output<\/td>3.3V regulated output<\/td><\/tr><\/table>","application_scenarios":"
      • Wi-Fi\/BLE module 3.3V clean power supply<\/li>
      • Audio codec low-noise analog supply<\/li>
      • RF transceiver VDD noise filtering<\/li>
      • Precision ADC voltage reference supply<\/li>
      • Portable communications clean power rail<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        onsemi<\/td>NCP511SN33T1G<\/td>SOT-23-5<\/td>30uVrms, 75dB PSRR<\/td><\/tr>
        TI<\/td>TPS73633DBVR<\/td>SOT-23-5<\/td>Low noise 400mA<\/td><\/tr>
        ADI<\/td>LT1761ES5-3.3#TRMPBF<\/td>SOT-23-5<\/td>Ultra-low 20uVrms noise<\/td><\/tr>
        Richtek<\/td>RT9080-33GJ5<\/td>TSOT-23-5<\/td>600mA replacement<\/td><\/tr>
        Richtek<\/td>RT9193-33PB<\/td>SC-70-5<\/td>Same function, smaller pkg<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9964","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=9964"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9964\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=9964"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=9964"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=9964"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}