ADP2389

RECOMMENDED FOR NEW DESIGNS

ADP2389

18 V, 12 A Step-Down Regulator with Programmable Current Limit

RECOMMENDED FOR NEW DESIGNS

18 V, 12 A Step-Down Regulator with Programmable Current Limit

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1ku List Price Starting From $3.06

Features

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

Additional 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.

Applications

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

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Visit the ADI Support Page

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FAQs

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Part Models 1

1ku List Price Starting From $3.06

Technical Documents 3

ADP2389/ADP2390: 18 V, 12 A Step-Down Regulator with Programmable Current Limit Data Sheet (Rev.0) 08/10/2015

UG-863: Evaluating the ADP2389/ADP2390, 18 V, 12 A Step-Down Regulators with Programmable Current-Limit (Rev.0) 09/28/2015

A Critical Short Pulse 02/01/2020

Design Resources 1

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADP2389ACPZ-R7	32-Lead LFCSP (5mm x 5mm x 0.9mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

ADP2389ACPZ-R7
Pin/Package Drawing
32-Lead LFCSP (5mm x 5mm x 0.9mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

EVAL-ADP2389

ADP2389 and ADP2390 Evaluation Board

EVAL-ADP2389

ADP2389 and ADP2390 Evaluation Board

Features and Benefits

Input voltage: 4.5 V to 18 V Continuous output current: 12 A
Integrated MOSFET: 17 mΩ/4.5 mΩ
Reference voltage: 0.6 V ±0.5%
Programmable switching frequency: 200 kHz to 2.2 MHz
Enhanced transient response
Programmable current-limit with ±10% accuracy
Precision enable and power good
External compensation and soft start
PFM mode (ADP2390 only)
Start up into a precharged output
Supported by ADIsimPower design tool

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Product Detail

The ADP2389/ADP2390 evaluation board is a complete, 12 A, 18 V, step-down regulator solution that allows users to evaluate the performance of the ADP2389/ADP2390 with a near ideal printed circuit board (PCB) layout.

The programmable current-limit function allows the inductor to be optimized by output current. The peak current-limit threshold is preset to 21 A to ensure the 12 A output current
capability.

The switching frequency can be programmed between 200 kHz and 2.2 MHz, which provides the possibility for a stackable multiphase power solution.

An enhanced transient response feature improves the load transient performance, which reduces the output capacitance.

The output of the ADP2389/ADP2390 evaluation board is preset to 1.8 V and the switching frequency is set to 500 kHz. Different output voltage settings can be achieved by changing appropriate passive components. The ambient temperature operating range is −40°C to +85°C.

Full details on the ADP2389/ADP2390 regulators are provided in the ADP2389/ADP2390 data sheet, available from Analog Devices, Inc., which should be consulted in conjunction with this user guide.

Resources

PDF

UG-863: Evaluating the ADP2389/ADP2390, 18 V, 12 A Step-Down Regulators with Programmable Current-Limit (Rev.0)

326.24 K

EVAL-ADP2389

ADP2389 and ADP2390 Evaluation Board

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Lt Spice

ADP2389 - Step-Down (Buck) Regulators

2.86 K

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.

Open Tool

SIMPLIS Models 1

Simulation Model

SIMPLIS Models

ADP2389 SIMPLIS Schematic

303.81KB

Versal Premium

Non-Hardware Verified Design

Full Power Management (-L Devices) PS Overdrive

Non-Hardware Verified Design

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Versal Premium

Circuits from the lab

Non-Hardware Verified Design

Features and Benefits

Xilinx Versal^™ Premium series solves a broad range of industry-specific problems with performance and flexibility. Core use cases include storage acceleration, data center network acceleration, 5G xHaul and Passive optical networks.

Analog Devices, Inc. supports power delivery solutions for the Versal Premium Platform. Monolithic solutions are used on the Versal Premium Platform to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated discrete solutions optimized for cost, efficiency and footprint.

ADI provides supporting documentation including power schematics, layout, LTpowerPlanner^® and applicable LTpowerPlay^® configuration files to enable you to validate the power solution for your application seamlessly.