{"id":8501,"date":"2026-06-29T02:54:45","date_gmt":"2026-06-29T02:54:45","guid":{"rendered":"https:\/\/materialparts.com\/ltc4370idepbf\/"},"modified":"2026-06-29T06:28:13","modified_gmt":"2026-06-29T06:28:13","slug":"ltc4370idepbf","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ltc4370idepbf\/","title":{"rendered":"LTC4370IDE#PBF"},"content":{"rendered":"

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

The LTC4370IDE#PBF from Analog Devices is a dual ideal diode-OR controller with input supply monitoring in a 14-lead DFN (4×3 mm) package. It drives two external N-channel MOSFETs to create near-ideal diodes, reducing power dissipation compared to Schottky diodes while providing reverse-current protection and input supply monitoring for redundant power source ORing.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n2 (dual ideal diode)<\/td>\n<\/tr>\n
Operating Voltage Range<\/td>\n2.9V to 40V<\/td>\n<\/tr>\n
Forward Voltage Drop<\/td>\n15 mV typ (MOSFET Rdson dependent)<\/td>\n<\/tr>\n
Reverse Current Block<\/td>\nYes (automatic)<\/td>\n<\/tr>\n
Supply Current<\/td>\n160 \u00b5A typ (both channels)<\/td>\n<\/tr>\n
MOSFET Gate Drive<\/td>\nN-channel, 12V gate boost<\/td>\n<\/tr>\n
Power Good Output<\/td>\nYes (open-drain)<\/td>\n<\/tr>\n
Overvoltage Protection<\/td>\nAdjustable (external divider)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C (I-grade)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nDFN-14 (4 x 3 x 0.75 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Two independent ideal diode controllers in one package<\/li>\n
  • 15 mV forward voltage drop (versus 300-500 mV for Schottky)<\/li>\n
  • Automatic reverse-current blocking without external control<\/li>\n
  • Internal 12V charge pump for N-channel MOSFET gate drive<\/li>\n
  • Adjustable overvoltage and undervoltage thresholds per channel<\/li>\n
  • Power good output for supply status monitoring<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Redundant power supply ORing<\/li>\n
    • High-availability server and telecom systems<\/li>\n
    • Battery backup switchover circuits<\/li>\n
    • Wall adapter \/ battery power path selection<\/li>\n
    • Solar panel and battery ORing<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LTC4370IDE#PBF from Analog Devices is a dual ideal diode-OR controller with input supply monitoring in a 14-lead DFN (4×3 mm) package. It drives two external N-channel MOSFETs to create near-ideal diodes, reducing power dissipation compared to Schottky diodes while providing reverse-current protection and input supply monitoring for redundant power source ORing. Key […]<\/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":[13,29],"tags":[],"chip_brand":[165],"class_list":["post-8501","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-adi"],"acf":{"brief_explanation":"Dual ideal diode-OR controller, 2.9-40V, 15mV drop, N-ch MOSFET drive, DFN-14","date_code":"","package_case":"DFN-14 (4 x 3 x 0.75 mm)","in_stock":11380,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/4370f.pdf","price":"$3.40 @ 1ku","product_introduction":"The Analog Devices LTC4370IDE#PBF is a dual ideal diode-OR controller that drives two external N-channel MOSFETs to replace Schottky ORing diodes in redundant power supply systems. By actively controlling the MOSFET gate voltage to maintain a regulated 15 mV forward drop across each MOSFET, it dramatically reduces power dissipation compared to Schottky diodes (which typically drop 300-500 mV). If the input voltage falls below the output, the controller quickly turns off the MOSFET to block reverse current, preventing one supply from backfeeding into a failed or lower-voltage source. The internal 12V charge pump provides sufficient gate drive voltage for standard logic-level N-channel MOSFETs. Adjustable overvoltage and undervoltage thresholds per channel allow custom supply monitoring, while the power good output signals valid input supply status.","working_principle":"The LTC4370IDE#PBF controls two external N-channel MOSFETs to create near-ideal diodes. For each channel, a sense amplifier monitors the voltage drop across the MOSFET (from source to drain). In forward conduction, the controller drives the MOSFET gate to maintain a regulated 15 mV forward voltage drop. This ensures the MOSFET is fully enhanced (lowest Rdson) while providing a defined forward drop for current sharing between paralleled sources. When the input voltage drops below the output (indicating reverse current flow), the controller detects the polarity reversal and turns off the MOSFET within microseconds, blocking reverse current. The internal 12V charge pump boosts the gate drive above the source voltage to fully enhance standard N-channel MOSFETs. The overvoltage\/undervoltage comparators monitor each input supply against externally-set thresholds and disable the MOSFET when the input is out of range, protecting downstream circuitry from voltage faults.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>OUT<\/td>Common Output Voltage Sense<\/td><\/tr>
      2<\/td>INA<\/td>Channel A Input Voltage Sense<\/td><\/tr>
      3<\/td>GATEA<\/td>Channel A MOSFET Gate Drive<\/td><\/tr>
      4<\/td>OVEA<\/td>Channel A Overvoltage Set Input<\/td><\/tr>
      5<\/td>UVEA<\/td>Channel A Undervoltage Set Input<\/td><\/tr>
      6<\/td>GND<\/td>Ground<\/td><\/tr>
      7<\/td>UVEB<\/td>Channel B Undervoltage Set Input<\/td><\/tr>
      8<\/td>OVEB<\/td>Channel B Overvoltage Set Input<\/td><\/tr>
      9<\/td>GATEB<\/td>Channel B MOSFET Gate Drive<\/td><\/tr>
      10<\/td>INB<\/td>Channel B Input Voltage Sense<\/td><\/tr>
      11<\/td>VCC<\/td>Internal Supply (2.9-40V)<\/td><\/tr>
      12<\/td>PGD<\/td>Power Good Output (Open-Drain)<\/td><\/tr>
      13<\/td>EN<\/td>Enable Input<\/td><\/tr>
      14<\/td>CPOUT<\/td>Charge Pump Output (bypass cap)<\/td><\/tr><\/table>","application_scenarios":"
      • Redundant PSU ORing<\/b>: Dual ideal diode ORing for server and telecom N+1 redundant power supplies with 15 mV drop reducing heat by 95% vs Schottky<\/li>
      • Battery Backup<\/b>: Automatic switchover between wall adapter and battery with reverse-current blocking preventing battery backfeed during adapter failure<\/li>
      • Solar + Battery<\/b>: ORing solar panel and battery sources with overvoltage protection on the solar input for load-dump transient protection<\/li>
      • Industrial 24V Bus<\/b>: Dual 24V supply ORing with undervoltage lockout disabling a failed supply rail while maintaining output from the healthy rail<\/li>
      • Automotive Battery<\/b>: 12V battery and alternator ORing with adjustable OV\/UV thresholds for cold-crank and load-dump protection<\/li><\/ul>","alternative_models":"
        Model<\/th>Brand<\/th>Channels<\/th>Vin (V)<\/th>Package<\/th><\/tr>
        LTC4371IUFD<\/td>ADI<\/td>4<\/td>2.9-40<\/td>QFN-28<\/td><\/tr>
        LM5050-1MKT<\/td>TI<\/td>1<\/td>2.9-75<\/td>SOT-23-6<\/td><\/tr>
        TPS2412DR<\/td>TI<\/td>1<\/td>3-16.5<\/td>SOIC-8<\/td><\/tr>
        MAX40200AUK+<\/td>ADI<\/td>1<\/td>1.5-5.5<\/td>SOT-23-5<\/td><\/tr>
        LTC4357CTS8<\/td>ADI<\/td>1<\/td>9-80<\/td>TSOT-23-8<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8501","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=8501"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8501\/revisions"}],"predecessor-version":[{"id":8502,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8501\/revisions\/8502"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8501"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8501"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8501"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}