{"id":10440,"date":"2026-07-20T03:53:45","date_gmt":"2026-07-20T03:53:45","guid":{"rendered":"https:\/\/ic-vendor.com\/nb6381dl-lf-z\/"},"modified":"2026-07-20T03:53:45","modified_gmt":"2026-07-20T03:53:45","slug":"nb6381dl-lf-z","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/es\/nb6381dl-lf-z\/","title":{"rendered":"NB6381DL-LF-Z"},"content":{"rendered":"

Productos<\/h2>\n

The NB6381DL-LF-Z from Monolithic Power Systems (MPS) is a fully integrated, high-frequency synchronous rectified step-down (buck) switching mode converter. It delivers up to 8A of continuous output current across a wide 4.5V to 28V input range, housed in a compact QFN-20 (3x4mm) package. The device utilizes Constant-On-Time (COT) control for fast transient response and simplified loop stabilization.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Input Voltage Range<\/td>\n4.5V to 28V<\/td>\n<\/tr>\n
Output Voltage Range<\/td>\n0.8V to 13V (adjustable)<\/td>\n<\/tr>\n
Corriente de salida<\/td>\n8A continuous<\/td>\n<\/tr>\n
Switching Frequency<\/td>\n200kHz to 1MHz<\/td>\n<\/tr>\n
High-Side MOSFET Rds(on)<\/td>\n30m\u03a9<\/td>\n<\/tr>\n
Low-Side MOSFET Rds(on)<\/td>\n12m\u03a9<\/td>\n<\/tr>\n
Reference Voltage<\/td>\n815mV (1% accuracy)<\/td>\n<\/tr>\n
Paquete<\/td>\nQFN-20 (3x4mm)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Internal 30m\u03a9 high-side and 12m\u03a9 low-side power MOSFETs<\/li>\n
  • Proprietary switching loss reduction technique<\/li>\n
  • Programmable soft start and soft shutdown<\/li>\n
  • Full protection: SCP, OCP, OVP, UVP, and thermal shutdown<\/li>\n
  • Constant-On-Time (COT) control mode for fast transient response<\/li>\n
  • Power Good output signal<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Notebook systems and I\/O power<\/li>\n
    • Networking systems<\/li>\n
    • Optical communication systems<\/li>\n
    • Distributed power and POL (Point-of-Load) systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The NB6381DL-LF-Z from Monolithic Power Systems (MPS) is a fully integrated, high-frequency synchronous rectified step-down (buck) switching mode converter. It delivers up to 8A of continuous output current across a wide 4.5V to 28V input range, housed in a compact QFN-20 (3x4mm) package. The device utilizes Constant-On-Time (COT) control for fast transient response […]<\/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":[31,13],"tags":[1744],"chip_brand":[172],"class_list":["post-10440","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","tag-nb6381dl-lf-z","chip_brand-mps"],"acf":{"brief_explanation":"8A, 28V synchronous step-down buck converter in QFN-20 (3x4mm), 200kHz-1MHz, COT control","date_code":"","package_case":"QFN-20 (3x4mm)","in_stock":7320,"datasheet":"https:\/\/www.monolithicpower.com\/en\/documentview\/productdocument\/index\/version\/2\/document_type\/Datasheet\/lang\/en\/sku\/NB6381DL\/document_id\/1065","price":"$1.85 @ 1ku","product_introduction":"The NB6381DL-LF-Z is a high-efficiency, fast-transient synchronous step-down converter from Monolithic Power Systems. Designed for space-constrained power applications, it integrates both high-side (30m\u03a9) and low-side (12m\u03a9) MOSFETs in a tiny QFN-20 (3x4mm) package, eliminating external MOSFET requirements. The converter supports a wide input range of 4.5V to 28V and delivers up to 8A of continuous current, making it ideal for notebook, networking, and POL power systems. The COT control architecture provides excellent transient response while easing loop compensation design.","working_principle":"1. Power Stage: Integrated high-side and low-side MOSFETs perform synchronous buck conversion, reducing conduction losses compared to diode rectification.\n2. COT Control: Constant-On-Time control adjusts the off-time based on output voltage feedback, providing fast transient response without complex loop compensation.\n3. Protection Subsystem: Over-current protection (OCP) monitors inductor current cycle-by-cycle; over-voltage (OVP) and under-voltage (UVP) comparators monitor the output; thermal shutdown activates at 150\u00b0C with 25\u00b0C hysteresis.\n4. Soft Start\/Shutdown: Programmable soft start limits inrush current; soft shutdown discharges the output capacitor gracefully.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>AGND<\/td>Analog ground<\/td><\/tr>
      2<\/td>VCC<\/td>Internal 5V LDO output (bypass with 1uF cap)<\/td><\/tr>
      3-5<\/td>IN<\/td>Input voltage supply (4.5V-28V)<\/td><\/tr>
      6<\/td>EN<\/td>Enable input (active high)<\/td><\/tr>
      7<\/td>BS<\/td>High-side gate boost capacitor connection<\/td><\/tr>
      8,9,10<\/td>SW<\/td>Switching node (inductor connection)<\/td><\/tr>
      11<\/td>FB<\/td>Feedback input (reference 815mV)<\/td><\/tr>
      12<\/td>SS<\/td>Soft start capacitor input<\/td><\/tr>
      13<\/td>PGOOD<\/td>Power good open-drain output<\/td><\/tr>
      14<\/td>R7\/Ton<\/td>On-time programming resistor input<\/td><\/tr>
      15-20<\/td>PGND<\/td>Power ground<\/td><\/tr><\/table>","application_scenarios":"
      • Notebook and laptop system power rails (1.05V, 1.2V, 1.5V, 1.8V, 3.3V, 5V)<\/li>
      • Networking and telecom equipment POL converters<\/li>
      • Optical communication module power supplies<\/li>
      • Distributed power architectures in server and storage systems<\/li>
      • Set-top box and digital TV power management<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        MPS<\/td>NB639DL-LF-Z<\/td>QFN-20 (3x4mm)<\/td>8A, 28V, higher switching freq option<\/td><\/tr>
        MPS<\/td>NB638DL-LF-Z<\/td>QFN-20 (3x4mm)<\/td>7A version, same footprint<\/td><\/tr>
        MPS<\/td>MP8736<\/td>QFN-20 (3x4mm)<\/td>6A, 19V input, pin compatible<\/td><\/tr>
        Texas Instruments<\/td>TPS54320<\/td>QFN-16<\/td>3A, similar feature set<\/td><\/tr>
        Analog Devices<\/td>ADP2386<\/td>QFN-20<\/td>6A, 20V input synchronous buck<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/10440","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/comments?post=10440"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/10440\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/media?parent=10440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/categories?post=10440"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/tags?post=10440"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/chip_brand?post=10440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}