MAX20458

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

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


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说明

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.

关键特性

  • 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

应用

  • null
  • 仪表板
  • 导航及无线电头单元
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MAX20458EVKIT: Evaluation Kit for the MAX20458

质量和环境数据

申请可靠性报告: MAX20458 
无铅封装的锡(Sn)晶须报告

工具和模型

  • EE-Sim: MAX20458 设计和仿真
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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