{"id":6229,"date":"2026-06-12T09:41:54","date_gmt":"2026-06-12T09:41:54","guid":{"rendered":"https:\/\/materialparts.com\/ltc3789egntrpbf\/"},"modified":"2026-06-12T09:41:54","modified_gmt":"2026-06-12T09:41:54","slug":"ltc3789egntrpbf","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ltc3789egntrpbf\/","title":{"rendered":"LTC3789EGN#TRPBF"},"content":{"rendered":"

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

The LTC3789EGN#TRPBF from Analog Devices is a high efficiency, synchronous, 4-switch buck-boost DC\/DC controller that operates from input voltages above, below, or equal to the output voltage. Housed in a 28-lead SSOP package, it provides a programmable output voltage and supports input voltages from 4V to 38V, making it ideal for automotive, industrial, and battery-powered systems.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n4V to 38V<\/td>\n<\/tr>\n
Output Voltage Range<\/td>\n0.8V to 38V<\/td>\n<\/tr>\n
\u5f00\u5173\u9891\u7387<\/td>\n200kHz to 600kHz (programmable)<\/td>\n<\/tr>\n
Reference Voltage<\/td>\n0.8V<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n290\u03bcA (typical)<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n8\u03bcA<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSSOP-28 (GN)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Synchronous 4-switch buck-boost topology for seamless transitions<\/li>\n
  • Up to 98% efficiency in buck or boost mode<\/li>\n
  • Programmable switching frequency with external synchronization<\/li>\n
  • Adjustable soft-start with internal pull-up current<\/li>\n
  • Current mode control for fast transient response<\/li>\n
  • Internal LDO with EXTVCC support for improved efficiency<\/li>\n
  • Input and output average current limit capability<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Automotive battery regulation systems<\/li>\n
    • Industrial distributed power architectures<\/li>\n
    • Battery-powered portable equipment<\/li>\n
    • Solar-powered regulator systems<\/li>\n
    • Telecom power supplies<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LTC3789EGN#TRPBF from Analog Devices is a high efficiency, synchronous, 4-switch buck-boost DC\/DC controller that operates from input voltages above, below, or equal to the output voltage. Housed in a 28-lead SSOP package, it provides a programmable output voltage and supports input voltages from 4V to 38V, making it ideal for automotive, industrial, […]<\/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":[31,13],"tags":[],"chip_brand":[165],"class_list":["post-6229","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-adi"],"acf":{"brief_explanation":"4-switch synchronous buck-boost DC\/DC controller, 4-38V input, 0.8-38V output, SSOP-28 package, up to 98% efficiency","date_code":"","package_case":"SSOP-28 (GN)","in_stock":6228,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/3789fb.pdf","price":"$5.82 @ 1ku","product_introduction":"The LTC3789 is a high performance synchronous buck-boost switching regulator controller from Analog Devices that operates from input voltages above, below, or equal to the output voltage. The topology uses four N-channel MOSFET switches in a full-bridge configuration, controlled by a current-mode architecture that provides fast transient response and easy loop stabilization. The device incorporates an internal low dropout regulator (LDO) that powers the gate drivers from VIN or from an external supply via the EXTVCC pin for improved efficiency. The LTC3789 also features programmable switching frequency, adjustable soft-start, and input\/output average current limiting, making it a versatile solution for a wide range of power conversion applications.","working_principle":"The LTC3789 employs a 4-switch synchronous buck-boost topology with current-mode control. When VIN is significantly higher than VOUT, the controller operates in buck mode, using the high-side switch TG1 and synchronous switch BG1 to step down the voltage. When VIN is significantly lower than VOUT, it operates in boost mode, using TG2 and BG2 to step up the voltage. When VIN is close to VOUT, the controller seamlessly transitions through buck-boost mode, utilizing all four switches. The current-mode architecture senses the inductor current through an external sense resistor and compares it with the error amplifier output to determine the switch duty cycle. This provides inherent line rejection, cycle-by-cycle current limiting, and simplified loop compensation.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>VFB<\/td>Error amplifier feedback input; receives voltage from external resistive divider<\/td><\/tr>
      2<\/td>SS<\/td>External soft-start input; capacitor to ground sets ramp time<\/td><\/tr>
      3<\/td>SENSE+<\/td>Positive input to current sense comparator<\/td><\/tr>
      4<\/td>SENSE-<\/td>Negative input to current sense comparator<\/td><\/tr>
      5<\/td>ITH<\/td>Error amplifier output and compensation point<\/td><\/tr>
      6<\/td>SGND<\/td>Small signal ground<\/td><\/tr>
      7<\/td>MODE\/PLLIN<\/td>Mode selection or external sync input<\/td><\/tr>
      8<\/td>FREQ<\/td>Frequency set pin; resistor to ground programs switching frequency<\/td><\/tr>
      9<\/td>RUN<\/td>Run control input; below 0.5V shuts down the IC<\/td><\/tr>
      10<\/td>VINSNS<\/td>VIN sense input for buck-boost transition comparator<\/td><\/tr>
      11<\/td>VOUTSNS<\/td>VOUT sense input for buck-boost transition comparator<\/td><\/tr>
      12<\/td>ILIM<\/td>Average current sense range input<\/td><\/tr>
      13<\/td>IOSENSE+<\/td>Positive input to I\/O average current sense amplifier<\/td><\/tr>
      14<\/td>IOSENSE-<\/td>Negative input to I\/O average current sense amplifier<\/td><\/tr>
      15<\/td>TRIM<\/td>Tie to GND for normal operation<\/td><\/tr>
      16<\/td>BG2<\/td>Bottom gate drive for synchronous MOSFET on output side<\/td><\/tr>
      17<\/td>TG2<\/td>Top gate drive for high-side MOSFET on output side<\/td><\/tr>
      18<\/td>BOOST2<\/td>Bootstrap supply for top-side driver on output side<\/td><\/tr>
      19<\/td>BG1<\/td>Bottom gate drive for synchronous MOSFET on input side<\/td><\/tr>
      20<\/td>EXTVCC<\/td>External power input to internal LDO<\/td><\/tr>
      21<\/td>INTVCC<\/td>Output of internal LDO; must be bypassed with 4.7\u03bcF capacitor<\/td><\/tr>
      22<\/td>VIN<\/td>Main supply pin<\/td><\/tr>
      23<\/td>BG1<\/td>Bottom gate drive for synchronous MOSFET on input side<\/td><\/tr>
      24<\/td>PGND<\/td>Driver power ground<\/td><\/tr>
      25<\/td>BOOST1<\/td>Bootstrap supply for top-side driver on input side<\/td><\/tr>
      26<\/td>TG1<\/td>Top gate drive for high-side MOSFET on input side<\/td><\/tr>
      27<\/td>SS<\/td>Soft-start pin (secondary function)<\/td><\/tr>
      28<\/td>SENSE+<\/td>Current sense positive input (alternate)<\/td><\/tr><\/table>","application_scenarios":"
      • Automotive Battery Regulation<\/b>: Maintains stable 12V output from a battery that varies from 6V to 18V during cranking and charging<\/li>
      • Industrial Distributed Power<\/b>: Converts 24V bus to regulated 12V or 5V with seamless transition through input voltage variations<\/li>
      • Portable Battery-Powered Devices<\/b>: Regulates output from multi-cell Li-ion packs (6V-16.8V) to constant system voltage<\/li>
      • Solar Power Systems<\/b>: Converts variable solar panel voltage to stable bus voltage for battery charging<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>VIN Range<\/th>Topology<\/th>Package<\/th><\/tr>
        LTC3789IFE#TRPBF<\/td>Analog Devices<\/td>4-38V<\/td>Buck-Boost<\/td>TSSOP-28<\/td><\/tr>
        LTC3789EUH#TRPBF<\/td>Analog Devices<\/td>4-38V<\/td>Buck-Boost<\/td>QFN-32<\/td><\/tr>
        LM5175RHFR<\/td>Texas Instruments<\/td>3.5-42V<\/td>Buck-Boost<\/td>VQFN-28<\/td><\/tr>
        MPU17-4.5-QC<\/td>Monolithic Power<\/td>4-36V<\/td>Buck-Boost<\/td>QFN<\/td><\/tr>
        LTC3115IFE#TRPBF<\/td>Analog Devices<\/td>2.7-40V<\/td>Buck-Boost<\/td>TSSOP-28<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6229","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=6229"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6229\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=6229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=6229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=6229"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=6229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}