{"id":2128,"date":"2026-05-14T04:12:46","date_gmt":"2026-05-14T04:12:46","guid":{"rendered":"https:\/\/materialparts.com\/mic5219-2-8ym5-tr\/"},"modified":"2026-05-14T04:12:46","modified_gmt":"2026-05-14T04:12:46","slug":"mic5219-2-8ym5-tr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/mic5219-2-8ym5-tr\/","title":{"rendered":"mic5219-2.8ym5-tr"},"content":{"rendered":"

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

The MIC5219-2.8YM5-TR is a 500 mA peak-output ultra-low-noise LDO linear regulator from Microchip (formerly Micrel) in a SOT-23-5 package. It provides a fixed 2.8 V output with +\/-1% accuracy from a 2.5 V to 12 V input. The BYP pin with an external 470 pF capacitor enables ultra-low output noise for RF-sensitive applications. Near-zero shutdown current (<1 μA) and CMOS\/TTL-compatible enable control make it ideal for battery-powered and portable devices.<\/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\n\n
\u062c\u0647\u062f \u0627\u0644\u062e\u0631\u062c<\/td>\n2.8 V fixed (+\/-1% typ)<\/td>\n<\/tr>\n
Max Output Current<\/td>\n500 mA peak<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n2.5 V to 12 V<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u062a\u0633\u0631\u0628<\/td>\n350 mV typ @ 500 mA \/ 115 mV typ @ 50 mA<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u0647\u062f\u0626\u0629<\/td>\n80 μA typ @ light load<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0625\u064a\u0642\u0627\u0641 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n<1 μA typ<\/td>\n<\/tr>\n
PSRRR<\/td>\n75 dB @ 120 Hz<\/td>\n<\/tr>\n
Output Noise (with BYP cap)<\/td>\n300 nV\/√Hz typ<\/td>\n<\/tr>\n
Output Noise (without BYP cap)<\/td>\n500 nV\/√Hz typ<\/td>\n<\/tr>\n
Line Regulation<\/td>\n0.009%\/V typ<\/td>\n<\/tr>\n
Load Regulation<\/td>\n0.05% typ<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u062f \u0627\u0644\u062d\u0627\u0644\u064a<\/td>\n700 mA typ<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n\u0645\u0646 -40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +125 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOT-23-5 (2.9 x 1.6 x 1.1 mm)<\/td>\n<\/tr>\n
Packaging<\/td>\nTape & Reel (3000\/reel)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Ultra-low noise output with BYP pin bypass capacitor (470 pF to GND)<\/li>\n
  • Near-zero shutdown current (<1 μA) extends battery life<\/li>\n
  • CMOS P-MOSFET pass element: ground current does not increase with load<\/li>\n
  • Current limit, thermal shutdown, and reverse-battery protection<\/li>\n
  • Only 2.2 μF tantalum or 1 μF ceramic output capacitor required<\/li>\n
  • CMOS\/TTL-compatible enable\/shutdown control<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • RF \/ wireless module power supply (2.8 V rail)<\/li>\n
    • Audio circuit low-noise supply<\/li>\n
    • \u0623\u062c\u0647\u0632\u0629 \u0645\u062d\u0645\u0648\u0644\u0629 \u062a\u0639\u0645\u0644 \u0628\u0627\u0644\u0628\u0637\u0627\u0631\u064a\u0629<\/li>\n
    • GSM\/GPRS module peak-current supply<\/li>\n
    • USB-powered devices<\/li>\n
    • 2.8 V logic \/ I\/O power rail<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MIC5219-2.8YM5-TR is a 500 mA peak-output ultra-low-noise LDO linear regulator from Microchip (formerly Micrel) in a SOT-23-5 package. It provides a fixed 2.8 V output with +\/-1% accuracy from a 2.5 V to 12 V input. The BYP pin with an external 470 pF capacitor enables ultra-low output noise for RF-sensitive applications. […]<\/p>\n","protected":false},"author":2,"featured_media":2180,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[32],"tags":[],"chip_brand":[134],"class_list":["post-2128","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-low-dropout-regulators-ldo","chip_brand-microchip"],"acf":{"brief_explanation":"500mA-peak LDO, 2.8V fixed +\/-1%, 350mV dropout @ 500mA, 80uA Iq, ultra-low noise w\/ BYP pin, SOT-23-5, -40 to +125C","date_code":"","package_case":"SOT-23-5 \/ SC-74A \/ SOT-753 (2.9 x 1.6 x 1.1 mm, 0.95mm pitch, Surface Mount)","in_stock":9701,"datasheet":"https:\/\/www.microchip.com\/en-us\/product\/mic5219","price":"$1.07 @ 1ku","product_introduction":"The MIC5219-2.8YM5-TR from Microchip (formerly Micrel) is a 500 mA peak-output low-dropout linear regulator with a fixed 2.8 V output. It features ultra-low noise performance via a BYP bypass pin (470 pF capacitor to GND reduces output noise to 300 nV\/sqrt-Hz), +\/-1% output voltage accuracy, and a low 350 mV typical dropout voltage at full load. The 80 uA quiescent current and near-zero shutdown current (<1 uA) make it ideal for battery-powered applications. The CMOS P-MOSFET pass element ensures ground current remains nearly constant regardless of load. Built-in protections include current limiting, thermal shutdown, and reverse-battery protection.","working_principle":"The MIC5219 uses a P-channel MOSFET pass transistor controlled by an error amplifier that compares a fraction of the output voltage (from an internal resistor divider for fixed-voltage versions) against a precision bandgap reference. The error amplifier drives the PMOS gate to regulate the output. A unique BYP pin connects to the reference voltage node through an internal resistor; an external 470 pF capacitor on this pin filters reference noise, achieving ultra-low output noise. The enable pin controls a CMOS\/TTL-compatible shutdown circuit that disconnects the pass transistor, reducing supply current to below 1 uA. Current limiting is implemented by sensing the pass transistor current and clamping the gate drive. Thermal shutdown activates at approximately 160 degC with 15 degC hysteresis. The reverse-battery protection circuit prevents damage when input polarity is reversed.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th>Description<\/th><\/tr>
      1<\/td>IN<\/td>Supply Input<\/td>2.5V to 12V; 1uF input cap recommended<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td>Common ground reference<\/td><\/tr>
      3<\/td>EN<\/td>Enable<\/td>CMOS\/TTL compatible; High=enable, Low\/open=shutdown<\/td><\/tr>
      4<\/td>BYP<\/td>Bypass\/Noise Reduction<\/td>Connect 470pF cap to GND for ultra-low noise; may be left open<\/td><\/tr>
      5<\/td>OUT<\/td>Regulator Output<\/td>2.8V fixed; 2.2uF tantalum or 1uF ceramic cap required<\/td><\/tr><\/table>","application_scenarios":"
      • RF\/wireless module 2.8V power supply with ultra-low noise requirement<\/li>
      • Battery-powered portable electronics requiring long standby life<\/li>
      • GSM\/GPRS module peak-current supply during transmit bursts<\/li>
      • Audio codec and DAC clean power rail<\/li>
      • 2.8V I\/O voltage rail for FPGA\/ASIC power sequencing<\/li>
      • USB-powered device regulation<\/li><\/ul>","alternative_models":"
        Model<\/th>Type<\/th>Description<\/th><\/tr>
        MIC5219-3.3YM5-TR<\/td>Same series<\/td>3.3V output version; identical package and pinout; most common variant<\/td><\/tr>
        MIC5219-2.85YM5-TR<\/td>Same series<\/td>2.85V output; closest voltage variant; for 2.85V logic rails<\/td><\/tr>
        MIC5219-3.0YM5-TR<\/td>Same series<\/td>3.0V output version; for 3.0V systems<\/td><\/tr>
        AP2112-2.8VSRG1<\/td>Functional equivalent<\/td>Diodes Inc 600mA LDO, 2.8V, SOT-23-5; higher current rating<\/td><\/tr>
        TLV70028DBVR<\/td>Functional equivalent<\/td>TI 300mA LDO, 2.8V, SOT-23-5; lower Iq (38uA) but lower current<\/td><\/tr>
        RT9193-28GB<\/td>Functional equivalent<\/td>Richtek 300mA LDO, 2.8V, SOT-23-5; cost-effective alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2128","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=2128"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2128\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media\/2180"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=2128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=2128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=2128"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=2128"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}