{"id":7647,"date":"2026-06-26T07:07:24","date_gmt":"2026-06-26T07:07:24","guid":{"rendered":"https:\/\/ic-vendor.com\/tlv1117lv33dcyr\/"},"modified":"2026-06-28T10:09:55","modified_gmt":"2026-06-28T10:09:55","slug":"tlv1117lv33dcyr","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/tlv1117lv33dcyr\/","title":{"rendered":"TLV1117LV33DCYR"},"content":{"rendered":"

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

The TLV1117LV33DCYR from Texas Instruments is a 1A LDO regulator with 3.3V fixed output, 300mV dropout, and 500uA IQ in SOT-223.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\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>\n1A<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n300 mV max @ 1A<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n2.0V to 5.5V<\/td>\n<\/tr>\n
IQ<\/td>\n500 uA typical<\/td>\n<\/tr>\n
PSRR<\/td>\n68 dB @ 120Hz<\/td>\n<\/tr>\n
Output Cap<\/td>\n10uF ceramic min<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-223 (DCY)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +125 C (TJ)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 1A output with 300mV dropout<\/li>\n
  • 500uA low quiescent current<\/li>\n
  • Stable with 10uF ceramic output cap<\/li>\n
  • Internal current and thermal limiting<\/li>\n
  • Drop-in compatible with AMS1117<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Post-regulation after switching supply<\/li>\n
    • 3.3V rail from 5V USB<\/li>\n
    • Battery-powered systems<\/li>\n
    • FPGA\/MCU I\/O power<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TLV1117LV33DCYR from Texas Instruments is a 1A LDO regulator with 3.3V fixed output, 300mV dropout, and 500uA IQ in SOT-223. Key Specifications Output Voltage 3.3V fixed Output Current 1A Dropout Voltage 300 mV max @ 1A Input Voltage 2.0V to 5.5V IQ 500 uA typical PSRR 68 dB @ 120Hz Output Cap […]<\/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-7647","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, 3.3V, 300mV dropout, SOT-223","date_code":"","package_case":"SOT-223 (6.50 x 3.50 x 1.60 mm)","in_stock":28000,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tlv1117lv.pdf","price":"$0.38 @ 1ku","product_introduction":"The TLV1117LV33DCYR from Texas Instruments is a 1A low-dropout linear regulator with 3.3V fixed output in SOT-223 package. The 300mV maximum dropout at full load enables efficient 5V-to-3.3V conversion. The 500uA quiescent current is significantly lower than legacy 1117 devices (5-10mA), reducing power waste in always-on applications. The device is stable with just 10uF ceramic output capacitance. Pin-compatible with AMS1117 and other standard 1117 LDOs, enabling easy upgrades.","working_principle":"The TLV1117LV33DCYR operates as a low-dropout linear regulator. (1) The PNP pass transistor provides the low 300mV dropout characteristic at 1A. The error amplifier compares the output voltage with an internal bandgap reference and adjusts the pass transistor drive to maintain regulation. The +\/-1.5% output accuracy ensures reliable 3.3V logic levels. (2) The 500uA quiescent current is a major improvement over legacy 1117 devices that draw 5-10mA. This reduces power dissipation in battery-powered and always-on applications. The quiescent current is relatively constant across load, simplifying thermal design. (3) The device is stable with just 10uF ceramic output capacitance, eliminating the need for expensive tantalum capacitors. Internal current limiting protects against overload (1.5A typical), and thermal shutdown activates at 165C. The SOT-223 package provides a good thermal path with 15C\/W junction-to-case thermal resistance.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>IN<\/td>Unregulated input voltage (2.7 V to 5.5 V); stable with 10 uF ceramic output capacitor<\/td><\/tr>
      2<\/td>GND<\/td>Ground; connect to PCB ground plane and thermal relief for heat dissipation<\/td><\/tr>
      3<\/td>OUT<\/td>Regulated 3.3 V output at 1 A; 68 dB PSRR at 120 Hz, low 42 uVrms output noise<\/td><\/tr><\/table>

      Package: SOT-223-3 (DCY). Dropout voltage: 300 mV at 1 A. Quiescent current: 500 uA typical. Output capacitor: 10 uF ceramic minimum.<\/p>","application_scenarios":"

      • 5 V USB to 3.3 V Conversion:<\/strong> Stepping down USB 5 V bus power to 3.3 V with only 300 mV dropout at full 1 A load, ideal for USB-powered MCU and FPGA boards<\/li>
      • Post-SMPS Linear Regulation:<\/strong> Cascading after a 5 V switching pre-regulator to deliver ultra-clean 3.3 V with 68 dB PSRR for RF and analog front-end circuits<\/li>
      • Battery-Powered 3.3 V Systems:<\/strong> 500 uA quiescent current enables efficient regulation from single-cell Li-ion (3.6 V to 3.0 V) in portable instrumentation<\/li>
      • FPGA and MCU I\/O Power:<\/strong> Delivering 3.3 V at 1 A for FPGA I\/O banks and MCU peripherals with 10 uF ceramic capacitor stability and low 42 uVrms output noise<\/li>
      • Wearable and IoT Devices:<\/strong> Compact SOT-223 footprint with low dropout enabling direct 3.6 V Li-ion to 3.3 V conversion in space-constrained wearable electronics<\/li><\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th>Package<\/th>Output<\/th><\/tr>\n
        TLV1117LV50DCYR<\/td>TI<\/td>5.0V output version for 5V logic and USB power rails with same 300mV dropout at 1A<\/td>SOT-223-3<\/td>5.0V fixed<\/td><\/tr>\n
        AMS1117-3.3<\/td>Advanced Monolithic<\/td>Budget equivalent with 5mA IQ and higher 1.1V dropout but very low cost and widely available<\/td>SOT-223-3<\/td>3.3V fixed<\/td><\/tr>\n
        MC33275DT-3.3RKG<\/td>onsemi<\/td>300mA precision LDO with 260mV dropout and very low 42uVrms output noise<\/td>SOT-223-3<\/td>3.3V fixed<\/td><\/tr>\n
        MCP1826T-3302E\/DC<\/td>Microchip<\/td>1A anyCAP stable LDO with 210mV dropout and +\/-1.5% output accuracy over temperature<\/td>SOT-223-3<\/td>3.3V fixed<\/td><\/tr>\n
        ADP3338AKCZ-3.3-R7<\/td>ADI<\/td>300mA anyCAP LDO with +\/-1.1% output accuracy and 75uA ground current<\/td>SOT-223-3<\/td>3.3V fixed<\/td><\/tr>\n<\/table>\n

        The TLV1117LV33DCYR is a 1A low-dropout regulator with 300mV dropout at full load and 500uA quiescent current. It is stable with only 10uF ceramic output capacitor. The AMS1117-3.3 is a popular low-cost alternative with higher dropout but identical SOT-223-3 pinout (IN-OUT-GND).<\/p>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/7647","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=7647"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/7647\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=7647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=7647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=7647"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}