MAX20458
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MAX20458

36V Boost Controller with 3.5A Synchronous Buck Converter For Automotive Applications

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Industries Smallest and Lowest Iq PMIC Offering Hgh Integration and Low BOM Cost for Automotive Applications

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 6
1ku List Price Starting From $1.69
Features
  • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • 10μA Supply Current with 5V Buck On
    • OUT Can Be Either 5V or 3.3V
    • 30µA Supply Current with All Regulators On
  • Enables Crank-Ready Designs
    • Output Voltages in Regulation Through Cold Crank Down to 2V Battery Voltage
    • 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
    • 2.1MHz Buck Converters with Asynchronous Boost Controller
    • Current-Mode Controller 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 MAX20458 is an automotive grade PMIC that includes a 3.5A synchronous buck converter and an asynchronous boost controller with 2.1MHz and 400kHz options. The boost controller can be used to provide power to buck converters and keep them in regulation during cold-crank operation down to 2V battery input. 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 the power-OK indicators for buck converters and undervoltage lockout for each power rail. Protection features include cycle-by-cycle current limit and thermal shutdown. The MAX20458 is specified for operation over the -40°C to +125°C automotive temperature range.

Applications

  • Automotive Start-Stop System
  • Distributed DC Power Systems
  • Instrument Cluster
  • Navigation and Radio Head Units
Part Models 6
1ku List Price Starting From $1.69

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX20458ATIA/VY+
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MAX20458ATIA/VY+T
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MAX20458ATID/VY+
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MAX20458ATID/VY+T
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MAX20458ATIF/VY+
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MAX20458ATIF/VY+T
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Part Models

Product Lifecycle

PCN

Dec 14, 2020

- 2077

WAFER FAB

MAX20458ATIA/VY+

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Dec 14, 2020

- 2077

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WAFER FAB

MAX20458ATIA/VY+

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX20458EVKIT

Evaluation Kit for the MAX20458

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MAX20458EVKIT

Evaluation Kit for the MAX20458

Evaluation Kit for the MAX20458

Features and Benefits

  • High-Voltage Step-Down Converter with Integrated Power FETs to Minimize Board-Area-Occupancy
  • Asynchronous Boost Controller
  • 3.5V to 40V Input Supply Range
  • Input Supply Range Extended down to 2V with Pre-Boost Enabled
  • 10V Fixed Boost Output Voltage (Separate Option Provides Adjustable Output Voltage)
  • Buck Provides 5V/3.3V Output up to 3.5A Output Current
  • Buck Output Voltages Adjustable between 1V and 10V using External Resistors
  • ±2% Buck Output Voltage Accuracy
  • Frequency-Synchronization Input
  • Independent Enable Inputs
  • Voltage-Monitoring PGOOD1 Output
  • Jumpers and Test Points on Key Nodes for Simplified Evaluation
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX20458 evaluation kit (EV kit) is a fully assembled and tested application circuit that simplifies the evaluation of the MAX20458 400kHz/2.1MHz, 36V boost controller and buck converter in a 28-pin side-wettable TQFN package. 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 MAX20458ATIA/VY+ installed (3.3V/ADJ, 2.1MHz) but can also be used to evaluate other MAX20458 variants with minimal component changes discussed in the Evaluating Other Variants section.

Applications

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

Tools & Simulations 1

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