{"id":3571,"date":"2026-06-06T10:40:55","date_gmt":"2026-06-06T10:40:55","guid":{"rendered":"https:\/\/materialparts.com\/mic5319-3-3yd5\/"},"modified":"2026-06-06T10:40:55","modified_gmt":"2026-06-06T10:40:55","slug":"mic5319-3-3yd5","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/mic5319-3-3yd5\/","title":{"rendered":"MIC5319-3.3YD5"},"content":{"rendered":"

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

The MIC5319-3.3YD5 from Microchip Technology (formerly Micrel) is a 500mA ultra-low dropout LDO regulator with a fixed 3.3V output. Featuring 200 mV dropout at 500mA, 70 dB PSRR at 1 kHz, and 30 uVrms output noise, it is designed for noise-sensitive RF and portable applications. The YD5 suffix denotes the thin SOT-23-5 (TSOT-23-5) 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\n\n
\u0627\u0644\u0646\u0648\u0639<\/td>\n500mA Ultra-Low Dropout LDO<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n3.3V (fixed)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n500 mA<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n2.5V – 5.5V<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062a\u0633\u0631\u0628<\/td>\n200 mV (typical at 500mA)<\/td>\n<\/tr>\n
PSRRR<\/td>\n70 dB @ 1 kHz<\/td>\n<\/tr>\n
\u0636\u0648\u0636\u0627\u0621 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n30 uVrms (10 Hz – 100 kHz, with BYP cap)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u0647\u062f\u0626\u0629<\/td>\n90 uA (total)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0625\u064a\u0642\u0627\u0641 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n< 1 uA<\/td>\n<\/tr>\n
Accuracy<\/td>\n1% initial, 2% over temperature<\/td>\n<\/tr>\n
Stability<\/td>\n2.2 uF ceramic output capacitor<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nTSOT-23-5<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to 125 C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Ultra-low 200 mV dropout at 500mA<\/li>\n
  • High 70 dB PSRR at 1 kHz for RF supply noise rejection<\/li>\n
  • Very low 30 uVrms output noise with BYP capacitor<\/li>\n
  • 90 uA total quiescent current for battery efficiency<\/li>\n
  • 1% initial output voltage accuracy<\/li>\n
  • Stable with 2.2 uF ceramic output capacitor (uCap design)<\/li>\n
  • Logic-controlled enable with zero-off-mode current<\/li>\n
  • BYP pin for noise reduction capacitor connection<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • RF power supply for Wi-Fi, Bluetooth, and GPS modules<\/li>\n
    • Smartphone and tablet peripheral power rails<\/li>\n
    • Battery-powered noise-sensitive instruments<\/li>\n
    • Post-regulation for switching supplies<\/li>\n
    • Portable medical device analog supply<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MIC5319-3.3YD5 from Microchip Technology (formerly Micrel) is a 500mA ultra-low dropout LDO regulator with a fixed 3.3V output. Featuring 200 mV dropout at 500mA, 70 dB PSRR at 1 kHz, and 30 uVrms output noise, it is designed for noise-sensitive RF and portable applications. The YD5 suffix denotes the thin SOT-23-5 (TSOT-23-5) […]<\/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":[13,29],"tags":[],"chip_brand":[134],"class_list":["post-3571","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-microchip"],"acf":{"brief_explanation":"500mA LDO, 3.3V fixed, 200mV dropout, 70dB PSRR, 30uVrms noise, TSOT-23-5","date_code":"","package_case":"TSOT-23-5 (2.80 x 2.70 x 0.90 mm)","in_stock":4950,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/mic5319.pdf","price":"$0.57 @ 1ku","product_introduction":"The MIC5319-3.3YD5 from Microchip Technology (formerly Micrel) is a 500mA ultra-low dropout LDO regulator with a fixed 3.3V output. It achieves 200 mV typical dropout at full 500mA load, 70 dB PSRR at 1 kHz, and only 30 uVrms output noise with an external bypass capacitor, making it ideal for noise-sensitive RF and analog applications. The uCap design ensures stability with a small 2.2 uF ceramic output capacitor, minimizing board space and BOM cost. With 90 uA total quiescent current and < 1 uA shutdown current, it is optimized for battery-powered systems. The 1% initial accuracy ensures tight voltage regulation for digital and analog loads.","working_principle":"The MIC5319-3.3YD5 uses a PNP pass transistor in a common-emitter configuration, which naturally provides low dropout voltage (200 mV at 500mA) because the pass element requires only a small VCE(sat) headroom. The error amplifier compares a divided version of the output to an internal bandgap reference, driving the PNP base to maintain regulation. The BYP pin connects to the internal bandgap reference through a high-impedance node; an external 0.1 uF capacitor on BYP filters reference noise, reducing output noise to 30 uVrms. The high PSRR (70 dB at 1 kHz) is achieved through the loop gain at low frequencies and the noise-filtered reference. The enable (EN) pin controls the bias circuitry; when disabled, all internal bias is shut off, drawing less than 1 uA from the input supply.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>IN<\/td>Power<\/td>Unregulated input supply (2.5-5.5V)<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      3<\/td>EN<\/td>Input<\/td>Enable (HIGH = on, LOW = shutdown)<\/td><\/tr>
      4<\/td>BYP<\/td>I\/O<\/td>Noise bypass (connect 0.1uF cap to GND)<\/td><\/tr>
      5<\/td>OUT<\/td>Power<\/td>Regulated 3.3V output<\/td><\/tr><\/table>","application_scenarios":"
      • RF module power: 70 dB PSRR and 30 uVrms noise for Wi-Fi\/BT\/GPS supply<\/li>
      • Smartphone peripherals: Low dropout from Li-ion (3.7V) to 3.3V rail<\/li>
      • Post-regulation: Clean analog supply from switching converter<\/li>
      • Battery instruments: 90 uA Iq and < 1 uA shutdown for long battery life<\/li>
      • Portable medical: Low noise analog supply for sensor signal conditioning<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>MIC5319-1.8YD5<\/td>TSOT-23-5<\/td>Fixed 1.8V version, same specs<\/td><\/tr>
        TI<\/td>TLV70033DDCR<\/td>SOT-23-5<\/td>200mA LDO, 3.3V, 70dB PSRR<\/td><\/tr>
        ADI<\/td>ADP122AUJZ-3.3-R7<\/td>TSOT-23-5<\/td>500mA, 3.3V, low noise<\/td><\/tr>
        Microchip<\/td>MIC5219-3.3YM5<\/td>SOT-23-5<\/td>500mA, 3.3V, earlier generation<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3571","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=3571"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3571\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3571"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3571"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3571"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}