Datasheet > MAX20458

MAX20458

更新时间： 2023-12-20 18:46:25

品牌	Logo	应用领域
亚德诺 - ADI		控制器转换器
页数	文件大小	规格书
23页	755K
描述
36V Boost控制器，集成3.5A同步Buck转换器，适用于汽车应用

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中文翻译

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MAX20458 数据手册

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36V Boost Controller with A 3.5A Synchronous

Buck Converter for Automotive Applications

MAX20458

General Description

Benefits and Features

The MAX20458 is an automotive grade PMIC that in-

cludes a 3.5A synchronous buck converter and an asyn-

chronous boost controller with 2.1MHz and 400kHz op-

tions. 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 cy-

cle. It is intended for applications with mid- to high-pow-

er requirements that operate at a wide input voltage range

such as during automotive cold-crank or engine stop-start

conditions.

● 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

High switching frequency up to 2.1MHz allows small ex-

ternal components, reduced output ripple, and guarantees

no AM band interference. The switching frequency is fixed

at 400kHz or 2.1MHz. FSYNC input programmability en-

ables three modes for optimized performance: forced

fixed-frequency operation, skip mode with ultra-low quies-

cent current, and phase-locked synchronization to an ex-

ternal clock. The spread spectrum option minimizes EMI

interference.

• 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

• A 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

The IC features the power-OK indicators for buck convert-

ers and undervoltage lockout for each power rail. Protec-

tion features include cycle-by-cycle current limit and ther-

mal shutdown. The MAX20458 is specified for operation

over the -40°C to +125°C automotive temperature range.

● Protection Features Improve System Reliability

• Supply Undervoltage Lockout

Applications

● Automotive Start-Stop System

• Overtemperature and Short-Circuit Protection

● Instrument Cluster

● Distributed DC Power Systems

● Navigation and Radio Head Units

19-100529; Rev 1; 10/21

Ordering Information appears at end of data sheet.

12 3 4 5 6 7...23

中文翻译

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与MAX20458相关器件

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MAX20459	ADI	获取价格	带USB-C专用充电端口的汽车级大电流降压转换器
MAX20459ATJA/V+	MAXIM	获取价格	Switching Regulator/Controller,
MAX2045ETJ	MAXIM	获取价格	Baseband Circuit, 5 X 5 MM, 0.80 MM HEIGHT, MO-220, QFN-32
MAX2045ETJ+	MAXIM	获取价格	Baseband Circuit, 5 X 5 MM, 0.80 MM HEIGHT, TQFN-32
MAX2045ETJ+T	MAXIM	获取价格	暂无描述
MAX2045ETJ-T	MAXIM	获取价格	High-Gain Vector Multipliers
MAX2045EVKIT	MAXIM	获取价格	Fully Assembled and Tested
MAX2045EVKIT\|MAX2046EVKIT\|MAX2047EVKIT	MAXIM	获取价格	Evaluation Kits for the MAX2045/MAX2046/MAX2047
MAX2046	MAXIM	获取价格	High-Gain Vector Multipliers
MAX2046	ADI	获取价格	高增益矢量乘法器

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