{"id":5508,"date":"2026-06-10T04:21:29","date_gmt":"2026-06-10T04:21:29","guid":{"rendered":"https:\/\/materialparts.com\/lm2776dbvr\/"},"modified":"2026-06-10T04:21:29","modified_gmt":"2026-06-10T04:21:29","slug":"lm2776dbvr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm2776dbvr\/","title":{"rendered":"LM2776DBVR"},"content":{"rendered":"

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

The LM2776DBVR from Texas Instruments is a regulated inverting switched capacitor charge pump that generates -5V from a 2.7-5.5V positive input in a SOT-23-6 package. With 50mA output current, 2MHz switching frequency, and only 4 external capacitors required, it provides a compact negative rail for op-amp and sensor supplies.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Output Voltage<\/td>\n-5.0V regulated<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n2.7V to 5.5V<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n50mA<\/td>\n<\/tr>\n
Efficiency<\/td>\nUp to 80%<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n2MHz fixed<\/td>\n<\/tr>\n
Iq<\/td>\n1.1mA typical<\/td>\n<\/tr>\n
Shutdown Iq<\/td>\n0.1uA<\/td>\n<\/tr>\n
Output Ripple<\/td>\n15mV typical<\/td>\n<\/tr>\n
External Components<\/td>\n4 capacitors only<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-6<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • -5V regulated output from positive supply<\/li>\n
  • No inductor required (charge pump topology)<\/li>\n
  • 50mA output current capability<\/li>\n
  • 2MHz high frequency for small capacitors<\/li>\n
  • 1.1mA Iq, 0.1uA shutdown current<\/li>\n
  • Only 4 external capacitors needed<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • GaN\/GaAs FET gate bias (-5V)<\/li>\n
    • Negative op-amp supply rail<\/li>\n
    • LCD negative bias voltage<\/li>\n
    • Audio amplifier split-rail generation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM2776DBVR from Texas Instruments is a regulated inverting switched capacitor charge pump that generates -5V from a 2.7-5.5V positive input in a SOT-23-6 package. With 50mA output current, 2MHz switching frequency, and only 4 external capacitors required, it provides a compact negative rail for op-amp and sensor supplies. Key Specifications Output Voltage […]<\/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":[],"class_list":["post-5508","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic"],"acf":{"brief_explanation":"Inverting charge pump, -5V 50mA, 2.7-5.5V, SOT-23-6","date_code":"","package_case":"SOT-23-6 (2.9 x 1.6 mm)","in_stock":9118,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm2776.pdf","price":"$0.55 @ 1ku","product_introduction":"The LM2776DBVR from Texas Instruments is a regulated inverting switched capacitor charge pump that generates -5V from a 2.7-5.5V positive input in a SOT-23-6 package. With 50mA output current, 2MHz switching frequency, and only 4 external capacitors required, it provides a compact negative rail for op-amp and sensor supplies.","working_principle":"The LM2776DBVR operates as described in the product overview. Key subsystems include the input stage, processing\/gain stage, output stage, and protection circuitry as detailed in the datasheet.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>VOUT<\/td>Output<\/td>-5V regulated output<\/td><\/tr>
      2<\/td>CFLY+<\/td>I\/O<\/td>Flying capacitor positive<\/td><\/tr>
      3<\/td>CFLY-<\/td>I\/O<\/td>Flying capacitor negative<\/td><\/tr>
      4<\/td>GND<\/td>Power<\/td>Ground (input return)<\/td><\/tr>
      5<\/td>EN<\/td>Input<\/td>Enable (active high)<\/td><\/tr>
      6<\/td>VIN<\/td>Power<\/td>Input supply (2.7-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • GaN\/GaAs FET gate bias (-5V)<\/li>
      • Negative op-amp supply rail<\/li>
      • LCD negative bias voltage<\/li>
      • Audio amplifier split-rail generation<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Package<\/th>Notes<\/th><\/tr>
        LM27761DBVR<\/td>TI<\/td>SOT-23-6<\/td>Adjustable -1.5 to -5V output<\/td><\/tr>
        TPS60400DBVR<\/td>TI<\/td>SOT-23-5<\/td>Unregulated -60mA charge pump<\/td><\/tr>
        LM2664MM\/NOPB<\/td>TI<\/td>VSSOP-8<\/td>Unregulated, 60mA<\/td><\/tr>
        MAX889TESA+T<\/td>ADI<\/td>SOIC-8<\/td>-2x Vin, 200mA<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5508","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=5508"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5508\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5508"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}