{"id":7039,"date":"2026-06-23T02:21:24","date_gmt":"2026-06-23T02:21:24","guid":{"rendered":"https:\/\/materialparts.com\/lt1764aefepbf\/"},"modified":"2026-06-23T02:21:24","modified_gmt":"2026-06-23T02:21:24","slug":"lt1764aefepbf","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lt1764aefepbf\/","title":{"rendered":"LT1764AEFE#PBF"},"content":{"rendered":"

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

The LT1764AEFE#PBF from Analog Devices (Linear Technology) is a 3A low-noise LDO linear regulator in a TSSOP-16E package with exposed pad. The A suffix denotes the adjustable output version, featuring 40uVRms output noise, 340mV dropout at 3A, and 1mA quiescent current, suitable for high-current noise-sensitive power rails.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Output Voltage<\/td>\nAdjustable (A version)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n3A<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n2.7V ~ 20V<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n340mV (Typical) @ 3A<\/td>\n<\/tr>\n
Output Noise<\/td>\n40uVRms (Typical, 0.1Hz-100kHz)<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n1mA (Typical)<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n<1uA<\/td>\n<\/tr>\n
Minimum Output Capacitor<\/td>\n10uF (Ceramic)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTSSOP-16E (5.00 x 4.40mm, exposed pad)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C ~ +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • High 3A output current with low 340mV dropout<\/li>\n
  • Low 40uVRms output noise for high-current analog supplies<\/li>\n
  • Externally programmable current limit<\/li>\n
  • Shutdown mode draws less than 1uA<\/li>\n
  • Stable with 10uF ceramic output capacitor<\/li>\n
  • Thermal shutdown and current limit protection<\/li>\n
  • Adjustable output via external resistor divider<\/li>\n
  • Exposed pad for superior thermal performance<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • FPGA and DSP core voltage regulation<\/li>\n
    • High-speed ADC\/DAC power supplies<\/li>\n
    • RF power amplifier bias supplies<\/li>\n
    • Post-regulation for switching supplies<\/li>\n
    • Battery charger termination circuits<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LT1764AEFE#PBF from Analog Devices (Linear Technology) is a 3A low-noise LDO linear regulator in a TSSOP-16E package with exposed pad. The A suffix denotes the adjustable output version, featuring 40uVRms output noise, 340mV dropout at 3A, and 1mA quiescent current, suitable for high-current noise-sensitive power rails. Key Specifications Output Voltage Adjustable (A […]<\/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":[165],"class_list":["post-7039","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-adi"],"acf":{"brief_explanation":"3A low-noise LDO, adjustable output, 40uVRms noise, 340mV dropout, programmable current limit in TSSOP-16E","date_code":"","package_case":"TSSOP-16E (5.00 x 4.40 x 1.00 mm) with exposed pad","in_stock":6733,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/1764af.pdf","price":"$4.50 @ 1ku","product_introduction":"The LT1764AEFE#PBF from Analog Devices (formerly Linear Technology) is a 3A fast transient response low-dropout linear regulator optimized for noise-sensitive, high-current applications. The adjustable version allows the output voltage to be set from 1.21V to 20V using an external resistor divider. The 40uVRms output noise over 0.1Hz to 100kHz is exceptionally low for a 3A regulator, making it ideal for powering high-resolution data converters and RF circuitry. The 340mV dropout voltage at 3A enables efficient post-regulation of switching supply outputs. An external resistor programs the current limit threshold, providing flexibility for different load requirements. The TSSOP-16E package with exposed die pad provides excellent thermal dissipation for the 3A output current. The device is stable with just 10uF of ceramic output capacitance.","working_principle":"The LT1764A uses a PNP pass transistor in a series-pass linear regulator topology with an internal 1.21V bandgap reference. The error amplifier compares the FB pin voltage with the reference and drives the PNP pass transistor base to maintain the set output voltage. The 340mV dropout at 3A is achieved by operating the PNP transistor in saturation, requiring minimal headroom. The low output noise is achieved through internal RC filtering of the bandgap reference. The externally programmable current limit uses a sense resistor between the OUT and SENSE pins; when the voltage across this resistor exceeds 50mV (typical), the current limit amplifier reduces the pass transistor drive. Thermal shutdown disables the pass transistor when junction temperature exceeds approximately 165\u00b0C. The exposed pad on the TSSOP-16E package must be soldered to the PCB ground plane for proper thermal performance.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>OUT<\/td>Regulated output voltage (high current path)<\/td><\/tr>
      2<\/td>SENSE<\/td>Output sense for regulation and current limit<\/td><\/tr>
      3<\/td>ADJ<\/td>Adjustment input - connect resistor divider from output<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td><\/tr>
      5<\/td>SHDN<\/td>Shutdown - pull low to disable<\/td><\/tr>
      6<\/td>IN<\/td>Input supply voltage (2.7V-20V)<\/td><\/tr>
      7-16<\/td>GND\/NC<\/td>Ground and no-connect pins<\/td><\/tr>
      Pad<\/td>GND<\/td>Exposed thermal pad - solder to PCB ground plane<\/td><\/tr><\/table>","application_scenarios":"
      • FPGA Core Voltage Post-Regulation<\/b>: 3A current supports Virtex\/UltraScale core rails; 40uVRms noise cleans switching supply ripple for FPGA PLL stability<\/li>
      • High-Speed ADC Power<\/b>: Low noise preserves 14-16 bit ADC SNR; fast transient response handles ADC sampling current transients<\/li>
      • RF Power Amplifier Bias<\/b>: Adjustable output sets PA bias voltage precisely; programmable current limit protects PA under fault conditions<\/li>
      • Post-Regulation After SMPS<\/b>: 340mV dropout enables efficient 3.3V-to-2.5V or 5V-to-3.3V post-regulation with minimal power dissipation<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        LT1764AEFE-1.8#PBF<\/td>ADI<\/td>Fixed 1.8V output version<\/td><\/tr>
        LT1764AEFE-3.3#PBF<\/td>ADI<\/td>Fixed 3.3V output version<\/td><\/tr>
        LT1963AEFE#PBF<\/td>ADI<\/td>1.5A version, same family<\/td><\/tr>
        TPS7A4701RGWR<\/td>TI<\/td>1A, 3.8uVRms noise, VQFN-20<\/td><\/tr>
        ADM7154ACPZ<\/td>ADI<\/td>600mA, 1uVRms noise, LFCSP-8<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7039","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=7039"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7039\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7039"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7039"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7039"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}