1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. ADP2389


Features and Benefits

  • Input voltage: 4.5 V to 18 V
  • Continuous output current: 12 A
  • Integrated MOSFETs: 17 mΩ high-side/4.5 mΩ low-side
  • 0.6 V ± 0.5% reference voltage
  • Programmable switching frequency range:
    200 kHz to 2200 kHz
  • Enhanced transient response
  • Programmable current limit with ±10% accuracy
  • Precision enable and power good
  • External compensation and soft start
  • Start up into a precharged output
  • Supported by the ADIsimPower design tool

Product Details

The ADP2389/ADP2390 are current mode control, synchronous step-down, dc-to-dc regulators. They integrate a 17 mΩ high-side power MOSFET and a 4.5 mΩ synchronous rectifier MOSFET to provide a high efficiency solution. The ADP2390 operates in pulse frequency modulation (PFM) mode to improve the system efficiency at light load. The ADP2389/ADP2390 run from an input voltage of 4.5 V to 18 V and can deliver up to 12 A of output current. The output voltage can be adjusted to 0.6 V and the switching frequency can be programmed between 200 kHz to 2200 kHz.

The ADP2389/ADP2390 target high performance applications that require high efficiency and design flexibility. External compensation and soft start provide design flexibility. The power-good output and precision enable input provide simple and reliable power sequencing. An enhanced transient response feature improves the load transient performance, which reduces the output capacitance. Programmable current limit allows the user to optimized the inductor design and provide a compact solution.

Other key features include undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

The ADP2389/ADP2390 operates over a -40°C to +125°C junction temperature range and is available in 32-lead, 5 mm × 5 mm LFCSP package.


  • Communication infrastructure
  • Networking and servers
  • Industrial and instrumentation
  • Healthcare and medical
  • Intermediate power rail conversions
  • DC-to-DC point of load applications

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Models for the following parts are available in LTspice:


Design Tool

ADP2389/ADP2390 Buck Designer Tool

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

Reference Designs (1)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
ADP2389ACPZ-R7 Material Declaration Reliability Data 32-Lead LFCSP (5mm x 5mm x 0.9mm w/ EP)
Wafer Fabrication Data

Sample & Buy

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Buy Now Pricing

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List Pricing

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Price Table Help


Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.