{"id":9161,"date":"2026-07-02T11:55:00","date_gmt":"2026-07-02T11:55:00","guid":{"rendered":"https:\/\/ic-vendor.com\/az1117eh-adj\/"},"modified":"2026-07-03T08:04:38","modified_gmt":"2026-07-03T08:04:38","slug":"az1117eh-adj","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/az1117eh-adj\/","title":{"rendered":"AZ1117EH-ADJ"},"content":{"rendered":"

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

The AZ1117EH-ADJ is a Diodes Incorporated 1A low-dropout (LDO) linear regulator with adjustable output voltage. It offers 1.3V maximum dropout at 1A, operates from 2.5V to 13.2V input, and provides output voltage adjustable from 1.25V via external resistors. The device includes current limit and thermal shutdown protection.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n2.5V to 13.2V<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n1A<\/td>\n<\/tr>\n
Output Voltage<\/td>\nAdjustable from 1.25V<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n1.3V @ 1A<\/td>\n<\/tr>\n
Line Regulation<\/td>\n0.2% (typical)<\/td>\n<\/tr>\n
Load Regulation<\/td>\n0.4% (typical)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Adjustable output voltage from 1.25V<\/li>\n
  • 1A output current capability<\/li>\n
  • Low dropout: 1.3V at full load<\/li>\n
  • Internal current limiting<\/li>\n
  • Thermal shutdown protection<\/li>\n
  • Excellent line and load regulation<\/li>\n
  • Stable with 10\u03bcF ceramic output capacitor<\/li>\n
  • Pin-compatible with AMS1117<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 3.3V to 2.5V\/1.8V logic power supply<\/li>\n
    • Battery-powered instrument regulators<\/li>\n
    • Post-regulation after switching converters<\/li>\n
    • Set-top box and consumer electronics<\/li>\n
    • General-purpose 1A LDO regulation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AZ1117EH-ADJ is a Diodes Incorporated 1A low-dropout (LDO) linear regulator with adjustable output voltage. It offers 1.3V maximum dropout at 1A, operates from 2.5V to 13.2V input, and provides output voltage adjustable from 1.25V via external resistors. The device includes current limit and thermal shutdown protection. Key Specifications Input Voltage Range 2.5V […]<\/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":[706],"chip_brand":[193],"class_list":["post-9161","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","tag-az1117eh-adj","chip_brand-diodes-inc"],"acf":{"brief_explanation":"1A adjustable LDO, 2.5-13.2V input, 1.3V dropout, 1.25V+ Vout, SOT-223","date_code":"","package_case":"SOT-223 (6.5 x 3.5 x 1.8 mm)","in_stock":18540,"datasheet":"https:\/\/www.diodes.com\/assets\/Datasheets\/AZ1117EH.pdf","price":"$0.065 @ 1ku","product_introduction":"The AZ1117EH-ADJ is a Diodes Incorporated 1A low-dropout adjustable linear regulator with input range 2.5V to 13.2V. The output voltage is set by an external resistor divider from 1.25V upward, with 1.3V maximum dropout at 1A load. It features internal current limiting, thermal shutdown, and excellent line\/load regulation. Pin-compatible with AMS1117 and stable with 10\u03bcF ceramic output capacitors, it is widely used for 3.3V\/2.5V\/1.8V logic power, battery-powered instruments, and post-regulation applications.","working_principle":"The AZ1117EH-ADJ uses a PNP pass transistor in a common-emitter configuration to achieve low dropout voltage. The internal 1.25V bandgap reference is compared against the ADJ pin voltage by an error amplifier, which drives the pass transistor to maintain regulation. The output voltage is set by a resistor divider: VOUT = 1.25V x (1 + R2\/R1) + IADJ x R2, where IADJ is typically 50\u03bcA. The low dropout voltage is a result of the PNP transistor's ability to operate in saturation with only VCE(sat) across the collector-emitter junction. Internal current limiting senses the pass transistor current and reduces the base drive when the limit is reached. Thermal shutdown disables the pass transistor at approximately 155\u00b0C.","pin_description":"
      Pin<\/th>Mnemonic<\/th>Description<\/th><\/tr>
      1<\/td>ADJ<\/td>Adjust \/ feedback pin<\/td><\/tr>
      2<\/td>VOUT<\/td>Regulated output voltage<\/td><\/tr>
      3<\/td>VIN<\/td>Input supply voltage (2.5-13.2V)<\/td><\/tr>
      4<\/td>N\/C<\/td>No connect (tab is VOUT)<\/td><\/tr><\/table>","application_scenarios":"
      • 5V to 3.3V logic power supply with 1A load capability<\/li>\n
      • 3.3V to 1.8V\/1.2V FPGA core voltage post-regulation<\/li>\n
      • Battery-powered instrument 3.3V\/5V regulated supply<\/li>\n
      • Set-top box and consumer electronics LDO regulation<\/li>\n
      • General-purpose adjustable LDO replacing AMS1117<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        AMS1117-ADJ<\/td>AMS<\/td>Original 1117 adjustable, similar specs<\/td><\/tr>
        LD1117ADJ<\/td>ST<\/td>800mA, 1.1V dropout, adjustable<\/td><\/tr>
        NCP1117ADJ<\/td>onsemi<\/td>1A, 1.3V dropout, adjustable<\/td><\/tr>
        TLV1117ADJ<\/td>TI<\/td>800mA, lower IQ, adjustable<\/td><\/tr>
        AZ1117EH-3.3<\/td>Diodes Inc<\/td>Fixed 3.3V version<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/9161","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=9161"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/9161\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=9161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=9161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=9161"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}