{"id":7586,"date":"2026-06-26T04:46:41","date_gmt":"2026-06-26T04:46:41","guid":{"rendered":"https:\/\/materialparts.com\/mic5219-3-3ym5-tr-2\/"},"modified":"2026-06-26T04:46:41","modified_gmt":"2026-06-26T04:46:41","slug":"mic5219-3-3ym5-tr-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/mic5219-3-3ym5-tr-2\/","title":{"rendered":"mic5219-3.3ym5-tr"},"content":{"rendered":"

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

The MIC5219-3.3YM5-TR from Microchip Technology is a 500mA fixed 3.3V LDO regulator with 500mV dropout, 0.01uA standby, and current limit protection in SOT-23-5 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Output Voltage<\/td>\n3.3 V fixed (+\/-2%)<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n2.5 V to 16 V<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n500 mA maximum<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n500 mV typical @ 500mA<\/td>\n<\/tr>\n
Quiescent Current (Active)<\/td>\n1.8 mA typical<\/td>\n<\/tr>\n
Standby Current (EN off)<\/td>\n0.01 uA typical<\/td>\n<\/tr>\n
Output Noise<\/td>\n100 uVrms (10Hz-100kHz)<\/td>\n<\/tr>\n
PSRR<\/td>\n70 dB @ 1kHz<\/td>\n<\/tr>\n
Line Regulation<\/td>\n0.004 %\/V<\/td>\n<\/tr>\n
Load Regulation<\/td>\n0.1 %<\/td>\n<\/tr>\n
Protection<\/td>\nCurrent limit, thermal shutdown, reverse battery<\/td>\n<\/tr>\n
Enable Pin<\/td>\nActive high (0.01uA standby)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-5 (YM5 suffix)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +125 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 0.01uA near-zero standby current via enable pin<\/li>\n
  • 500mA output with 500mV dropout in SOT-23-5<\/li>\n
  • 70dB PSRR for clean output from noisy input<\/li>\n
  • Current limit, thermal shutdown, and reverse-battery protection<\/li>\n
  • 3.3V fixed output eliminates external resistor divider<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Mobile phone and portable device power management<\/li>\n
    • USB bus-powered 3.3V supply<\/li>\n
    • RF module and wireless transceiver clean supply<\/li>\n
    • MCU and FPGA I\/O voltage regulation<\/li>\n
    • Battery-powered systems with enable power gating<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MIC5219-3.3YM5-TR from Microchip Technology is a 500mA fixed 3.3V LDO regulator with 500mV dropout, 0.01uA standby, and current limit protection in SOT-23-5 package. Key Specifications Output Voltage 3.3 V fixed (+\/-2%) Input Voltage Range 2.5 V to 16 V Output Current 500 mA maximum Dropout Voltage 500 mV typical @ 500mA Quiescent […]<\/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":[31,13],"tags":[],"chip_brand":[134],"class_list":["post-7586","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-microchip"],"acf":{"brief_explanation":"500mA 3.3V fixed LDO, 0.01uA standby, SOT-23-5","date_code":"","package_case":"SOT-23-5 (2.9 x 1.6 x 1.1 mm)","in_stock":35000,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/mic5219.pdf","price":"$0.42 @ 1ku","product_introduction":"The MIC5219-3.3YM5-TR from Microchip Technology is a 500mA fixed 3.3V low-dropout regulator in SOT-23-5 package. The device features 500mV typical dropout at 500mA, 70dB PSRR at 1kHz, 100uVrms output noise, and 0.01uA standby current when disabled via the enable pin. The fixed 3.3V output eliminates the need for external feedback resistors, reducing BOM count. Comprehensive protection includes current limit, thermal shutdown, and reverse-battery protection. The YM5-TR suffix denotes SOT-23-5 package with tape and reel packaging. The device is widely used in mobile phones, USB peripherals, and RF modules requiring a clean, low-noise 3.3V supply.","working_principle":"The MIC5219-3.3YM5-TR operates as a fixed-output positive LDO voltage regulator. (1) The pass element is a PNP transistor between IN and OUT. The error amplifier compares a fraction of the output voltage (via an internal resistor divider for the fixed 3.3V version) with an internal bandgap reference. The amplifier output drives the base of the PNP pass transistor to regulate the output. The PNP architecture allows the dropout voltage to be as low as VCE(sat) of the pass transistor, typically 500mV at 500mA. (2) The enable pin (EN) is active high. When EN is low, the pass transistor is fully off and the device draws only 0.01uA from the input supply. This near-zero standby current is critical for battery-powered applications where the regulator may be disabled for extended periods. When EN is high, the device regulates normally with 1.8mA typical quiescent current. (3) The 70dB PSRR at 1kHz means that 1V of input ripple is attenuated to 0.3mV at the output, making the device ideal for post-regulation after a switching converter. The 100uVrms output noise (10Hz-100kHz) ensures clean supply for noise-sensitive analog and RF circuits. The internal current limit protects against output short circuits, while the thermal shutdown protects against excessive junction temperature. The reverse-battery protection prevents damage if the input supply is accidentally reversed.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>IN<\/td>Input supply (2.5-16V)<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td><\/tr>
      3<\/td>EN<\/td>Enable (active high, 0.01uA standby)<\/td><\/tr>
      4<\/td>BYP<\/td>Noise bypass capacitor (optional)<\/td><\/tr>
      5<\/td>OUT<\/td>3.3V regulated output (500mA max)<\/td><\/tr><\/table>","application_scenarios":"
      • Mobile phone and portable device 3.3V power with 0.01uA standby<\/li>
      • USB bus-powered 3.3V supply with 500mA output<\/li>
      • RF module and wireless transceiver clean supply with 70dB PSRR<\/li>
      • MCU and FPGA I\/O 3.3V regulation with current limit protection<\/li>
      • Battery-powered systems with enable power gating<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        MIC5219-5.0YM5-TR<\/td>Microchip<\/td>5.0V fixed, same family<\/td><\/tr>
        RT9013-33GB<\/td>Richtek<\/td>500mA, 3.3V, SOT-23-5<\/td><\/tr>
        AP2112K-3.3TRG1<\/td>Diodes Inc<\/td>600mA, 3.3V, SOT-23-5<\/td><\/tr>
        TLV70033DDCR<\/td>TI<\/td>300mA, 3.3V, SOT-23-5<\/td><\/tr>
        NCV8164ASN330T1G<\/td>onsemi<\/td>300mA, 3.3V, AEC-Q100<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7586","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=7586"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7586\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7586"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}