MAX25255

RECOMMENDED FOR NEW DESIGNS

Dual 36V Input Voltage, 8A Synchronous Buck Converters with Multiphase Capability and ASIL B Safety Level

High Power Density and Scalable Power Conversion for Automotive Off-Battery Applications from Dual 6A to Single 32A

Data Sheet (Rev. 12) Product Selection Table
Viewing:

Overview

  • Dual Buck Converter
    • Wide Input Range from 3.0V to 36V (42V, max)
    • Low Shutdown Supply Current (6.5µA, max)
    • Low Operating Quiescent Current with One Channel ON (12µA, typ)
    • Programmable VOUT from 0.8V to 14V
    • Up to 8A per Channel
    • 180° Out-of-Phase Operation between Two Converters
    • 24ns (typ) Minimum On-Time
    • MAXQ Power Architecture
  • Dual/Quad-Phase Operation
    • Ability to Operate Two ICs in Parallel for Quad-Phase Operation
    • ±10% Current Sharing Accuracy
    • Supports up to 16A in Dual-Phase and 32A in QuadPhase
  • Diagnostics and Redundant Circuits (MAX25255)
    • ASIL B Compliant
    • Redundant Reference
    • Die Temperature Monitor
    • Precision Overvoltage and Undervoltage Protection
  • General
    • 23-Pin, 4.50mm x 5.75mm FC2QFN Package
    • -40°C to +125°C Operating Ambient Temperature
    • AEC-Q100 Rating
    • 200kHz, 400kHz, 1MHz, or 2MHz Switching Frequency Options
    • Spread Spectrum

The MAX25254/MAX25255 are small, synchronous dual buck converters with integrated high-side and lowside switches. The ICs are designed to deliver up to 8A per channel with input voltages from 3V to 36V while using only 12μA quiescent current at no load. Voltage quality can be monitored by observing the PGOOD signals. The MAX25254/MAX25255 can regulate the output voltage in the dropout region by running at 99% of the duty cycle, making them ideal for automotive and industrial applications.

The MAX25254/MAX25255 offer two fixed output voltages of 5V and 3.3V. Four fixed frequency options allow for small external components and reduced output ripple, and also guarantee no AM interference. The MAX25254/MAX25255 can enter skip mode at light loads with ultra-low quiescent current of 12μA at no load. The MAX25254/MAX25255 can be ordered with spread spectrum enabled for optimum EMI performance.

Two buck converters within the MAX25254D and MAX25255D can be configured for dual-phase operation with up to 16A output load capability. Furthermore, the MAX25254D/MAX25255D and the MAX25254Q/MAX25255Q can be used in parallel to provide quad-phase operation that supports up to 32A (max) output current.

The MAX25254/MAX25255 are available in a small, 4.50mm x 5.75mm, 23-pin FC2QFN package and use very few external components.

Applications

  • Front-End Power Supply for Head Units
  • ASIL Applications
  • General-Purpose Dual Buck Converters
  • Telematics Modules
  • Front Camera Power
MAX25255
Dual 36V Input Voltage, 8A Synchronous Buck Converters with Multiphase Capability and ASIL B Safety Level
MAX25254-MAX25255 Simplified Block Diagram MAX25254-MAX25255 Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Application Note 1

Technical Articles 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Evaluation Kits

MAX25255DUALEVKIT

Evaluation Kit for the MAX25255

Buy Now View Details

Features and Benefits

  • Input Supply Range from 3V to 36V
  • Buck Provides 3.3V Fixed Output and Adjustable from 0.8V to 14V
  • Delivers up to 12A/16A Output Current
  • Selectable BIAS LDO Input Source
  • Frequency-Synchronization Input
  • Independent Enable Inputs
  • Spread-Spectrum Available
  • Voltage Monitoring PGOOD Output Available
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX25255 dual phase evaluation kit (EV kit) provides a proven design to evaluate the MAX25255 automotive 2MHz synchronous buck converter dual phase operation. The EV kit comes with a MAX25255DAFDA/ VY+ (3.3V/2MHz)installed, as well as various test points and jumpers for evaluation.

The EV kit is designed to deliver up to 12A with input voltage 3V to 36V. The output voltage quality can be monitored by observing the PGOOD1 signal. The EV kit can also be used to evaluate other MAX25255 variants with minimal component changes.

APPLICATIONS

  • Front-End Power Supply for Head Units
  • ASIL Applications
  • General-Purpose Dual Buck Converters
  • Telematics Modules
  • Front Camera Power
MAX25255DUALEVKIT
Evaluation Kit for the MAX25255

Latest Discussions

No discussions on MAX25255 yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed