ADP2389

Name: ADP2389
Brand: Analog Devices

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

Data Sheet (Rev. 0) Product Selection Table

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Overview

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

Documentation

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

ADP2389

SIMPLIS Models 1

ADP2389 SIMPLIS Schematic

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

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.

Evaluation Kits

ADP2389 and ADP2390 Evaluation Board

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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

Product Details

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

UG-863: Evaluating the ADP2389/ADP2390, 18 V, 12 A Step-Down Regulators with Programmable Current-Limit (Rev.0)
9/28/2015

Reference Designs

Non-Hardware Verified Design

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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.