MAX20457
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MAX20457

High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applications

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Low Iq Dual Buck Offering High Integration and Low BOM Cost for Automotive Applications

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Part Models 14
1ku List Price Starting From $2.04
Features
  • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • 10µA Supply Current with 5V Buck On
    • 8µA Supply Current with 3.3V Buck On
    • 10µA Supply Current with Both Bucks On
  • Enables Crank-Ready Designs
    • Wide Input Supply Range from 3.5V to 36V
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input-Voltage Range
    • 20ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output at 2.1MHz
    • Spread-Spectrum Option
    • Phase-Locked Loop (PLL) Frequency Synchronization
  • Integration and Thermally Enhanced Packages Save Board Space and Cost
    • Two 2.1MHz Current-Mode Converters with Forced Fixed Frequency and Skip Modes
    • Thermally Enhanced 5mm x 5mm, 28-Pin TQFN-EP Package
  • Protection Features Improve System Reliability
    • Supply Undervoltage Lockout
    • Overtemperature and Short-Circuit Protection
Additional Details
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The MAX20457 offers two automotive-grade synchronous buck converters with fixed frequency of either 2.1MHz or 400kHz. The two high-voltage synchronous step-down converters operate 180 degrees out of phase. The IC operates with an input voltage supply from 3.5V to 36V and can operate in dropout conditions by running at 95% duty cycle. It is intended for applications with mid- to high-power requirements that operate at a wide input voltage range such as during automotive cold-crank or engine stop-start conditions.

High switching frequency up to 2.1MHz allows small external components, reduced output ripple, and guarantees no AM band interference. The switching frequency is fixed at 400kHz or 2.1MHz. FSYNC input programmability enables three modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and phase-locked synchronization to an external clock. The spread spectrum option minimizes EMI interference.

The IC features power-OK indicators and undervoltage lockout for the buck converters. Protection features include cycle-by-cycle current limit and thermal shutdown. The MAX20457 is specified for operation over the -40°C to +125°C automotive temperature range.

Applications

  • Automotive Start-Stop System
  • Instrument Cluster
  • Navigation and Radio Head Units
  • Telematics Applications
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Part Models 14
1ku List Price Starting From $2.04
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MAX20457

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UPDATED 01/29/2021
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MAX20457: High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applications Data Sheet (Rev.0)

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UPDATED 03/02/2021
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Choose a Low IQ, Low Minimum On-Time, and Low EMI Off-Battery PMIC to Power Your Automotive Electronics redirect icon

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Documentation

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2022-10-04

07:53

Introduction to the MAX20057 MAX20457 MAX20458 36V Boost Controller with Two Synchronous Buck Converters (3.5A/2A) for Automotive Applications

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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
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Dec 14, 2020

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Software & Part Ecosystem

Parts Product Life Cycle Description

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Evaluation Kits 2

MAX20457EVKIT

Evaluation Kit for the MAX20457

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MAX20457EVKIT

Evaluation Kit for the MAX20457

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MAX20457EVKIT
Evaluation Kit for the MAX20457

Features and Benefits

  • Dual High-Voltage Step-Down Converters with Integrated Power FETs to Minimize Board-Area Occupancy
  • 3.5V to 40V Input Supply Range
  • Buck1 Provides 5V Output up to 3.5A Output Current
  • Buck2 Provides 3.3V Output up to 2A Output Current
  • Buck Output Voltages Adjustable Between 1V and 4V using External Resistors
  • ±2% Output Voltage Accuracy for Buck Converters
  • Selectable Buck2 Input Source
  • Frequency-Synchronization Input
  • Independent Enable Inputs
  • Voltage-Monitoring PGOOD Outputs
  • Jumpers and Test Points on Key Nodes for Simplified Evaluation
  • Proven PCB Layout
  • Fully Assembled and Tested
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Product Detail

The MAX20457 evaluation kit (EV kit) is a fully assembled and tested application circuit that simplifies the evaluation of the MAX20457 2.1MHz dual buck converters. All installed components are rated for the automotive temperature range. Various test points and jumpers are included for evaluation.

The standard EV kit comes with the MAX20457ATIE/VY+ installed (5V, 3.3V, 2.1MHz) and can also be used to evaluate other MAX20457 variants with minimal component changes shown in the MAX20457 EV Kit Bill of Materials.

Applications

  • Automotive Start-Stop System
  • Instrument Cluster
  • Navigation and Radio Head Units
  • Telematics Applications

Resources

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MAX20457EVKIT Gerber Files - Design Files Download

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AD-ACEVSECRDSET-SL

Type 2 EVSE 3.6 kW Charging Cable

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Type 2 EVSE 3.6 kW Charging Cable

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AD-ACEVSECRDSET-SL
Type 2 EVSE 3.6 kW Charging Cable

Features and Benefits

  • Complete reference design for Type 2 EVSE Cordset (IC-CPD)
  • Power level from 2.3 kW up to 3.6 kW
  • Designed to comply with the applicable standards - IEC61851, IEC62752
  • Incorporates a 6 mA DC/30 mA rms RCD and a control pilot circuit
  • Stuck relay detection and relay state of health
  • Overtemperature detection
  • Integrated isolation
  • Reduced component count for cost optimization
  • Bluetooth 5.2 interface for connectivity to external devices
  • Open-source software stack to enable custom firmware development
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Product Detail

The AD-ACEVSECRDSET-SL is a complete Type 2 EVSE 3.6 kW charging cable solution, providing a reference design intended for evaluation and prototyping of electric vehicle (EV) charging systems.

The system includes a 3-channel isolated sigma-delta (Σ-Δ) ADC for voltage and current measurement on the single-phase power input and measurement of the relay voltage for solder contacts detection and relay state of health. Safe operation is enabled by the inclusion of a 6 mA DC / 30 mA rms RCD. Detection of overvoltage, undervoltage, overcurrent, overtemperature and EV diode presence is also available.

A MAX32655 low-power, ARM® Cortex®-M4 Microcontroller implements the logic for system control and communication with the EV over the control pilot interface. A programming and debugging interface are included. The MAX32655 Bluetooth 5.2 interface enables connectivity to external devices.

The design is accompanied by an open-source software stack and reference applications, enabling custom software development to start from a proven implementation validated to meet the applicable standards. An external programmer such as the MAX32625PICO MAXDAP Programming Adapter, or any other similar programmer supporting the SWD interface, is required to enable firmware programming and debug.

The system is designed to comply with the IEC61851 and IEC62752 standards.

APPLICATIONS

  • EV charging

Resources

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AD-ACEVSECRDSET-SL Design and Integration Files Download

8.49 M

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AD-ACEVSECRDSET-SL User Guide reference design link

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AD-ACEVSECRDSET-SL Software reference design link

Evaluation Kits2

MAX20457EVKIT

Evaluation Kit for the MAX20457
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AD-ACEVSECRDSET-SL

Type 2 EVSE 3.6 kW Charging Cable

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