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ADP2381:  20 V, 6 A Synchronous Step-Down Regulator with Low-Side Driver

Product Details

Product Status:Recommended for New Designs

The ADP2381 is a current mode control, synchronous, step-down, dc-to-dc regulator. It integrates a 44 mΩ power MOSFET and a low-side driver to provide a high efficiency solution. The ADP2381 runs from an input voltage of 4.5 V to 20 V and can deliver 6 A of output current. The output voltage can be adjusted to 0.6 V to 90% of the input voltage. The switching frequency of the ADP2381 can be programmed from 250 kHz to 1.4 MHz or fixed at 290 kHz or 550 kHz. The synchronization function allows the switching frequency to be synchronized to an external clock to minimize system noise.

External compensation and an adjustable soft start provide design flexibility. The power-good output provides simple and reliable power sequencing. Additional features include programmable undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

The ADP2381 operates over the −40°C to +125°C junction temperature range and is available in a 16-lead TSSOP_EP package.

APPLICATIONS

  • Communication infrastructure
  • Networking and servers
  • Industrial and instrumentation
  • Healthcare and medical
  • Intermediate power rail conversion
  • DC-to-dc point of load application

FEATURES and BENEFITS

  • Input voltage: 4.5 V to 20 V
  • Integrated 44 mΩ high-side MOSFET
  • 0.6 V ±1% reference voltage over temperature
  • Continuous output current:
    6 A
  • Programmable switching frequency:
    250 kHz to 1.4 MHz
  • Synchronizes to external clock: 250 kHz to 1.4 MHz
  • 180° out-of-phase synchronization
  • Programmable UVLO
  • Power-good output
  • External compensation
  • Internal soft start with external adjustable option
  • Startup into a precharged output
  • Supported by ADIsimPower design tool

Typical Applications Circuit Diagram for ADP2381

Documentation

Title Content Type File Type
ADP2381: 20 V, 6 A Synchronous Step-Down Regulator with Low-Side Driver Datasheet (Rev 0, 04/2012) (pdf, 836 kB) Data Sheets PDF
Introduction to ADIsimPower
ADIsimPower is a smart selector and a collection of downloadable tools that produce complete and optimized power designs. Schematic, bill of materials, and performance data are customized to your specific needs in minutes.
Videos HTML
UG-504: Evaluation Board for the ADP2380 and ADP2381, 20 V, 4 A/6 A Synchronous Step-Down Regulators with Low-Side Driver  (pdf, 410 kB) User Guides PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADIsimPE Linear and Mixed-Signal Circuit Simulator
ADIsimPE is powered by SIMetrix/SIMPLIS and is a circuit simulation suite optimized for the design and development of analog and mixed signal circuits.
ADIsim Design/Simulation Tools HTML
ADP238x Inverting Buck-Boost Regulator Design Tool  (zip, 0)
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
ADIsim Design/Simulation Tools ZIP
ADP238x Buck Regulator Design Tool  (zip, 0)
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
ADIsim Design/Simulation Tools ZIP
Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
ADIsim Design/Simulation Tools HTML
ADIsimPower™ Voltage Regulator Design Tool
This expert design tool produces custom DC-DC converter designs in about a minute. The user enters 5 inputs and chooses to optimize for efficiency, PCB space, cost, or part count. Output is a complete schematic, BOM, efficiency plot, and performance summary. A PDF summary and a blank PCB is offered for each design to facilitate fast prototyping to verify the design.
ADIsim Design/Simulation Tools HTML
Launch of ADIsimPower Voltage Regulator Selection Vin (min) V Vout V   Find Solutions
Vin (max) V Iout A

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADP2381 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP2381AREZ Status: Production TSSOP W/ THERMAL PAD 16 Ind Tube, 96 - - Y  Material Info Notify Me Purchase Sample
ADP2381AREZ-R7 Status: Production TSSOP W/ THERMAL PAD 16 Ind Reel, 1000 - $1.68 Y  Material Info Notify Me Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADP2380/ADP2381 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP2380-EVALZ Status: Production Evaluation Board $60.00 Yes -
ADP2381-EVALZ Status: Production Evaluation Board - Yes -

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