Datasheet > MAX20457

MAX20457

更新时间： 2024-09-17 02:48:47

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
17页	1479K
描述
High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applications

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MAX20457 数据手册

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MAX20457

High-Eﬃciency, 36V, Dual Synchronous

Buck Converters (3.5A/2A)

for Automotive Applications

General Description

Beneﬁts and Features

● Meets Stringent OEM Module Power Consumption

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° 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.

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

High switching frequency up to 2.1MHz allows small

external components, reduced output ripple, and guaran-

tees 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 qui-

escent current, and phase-locked synchronization to an

external 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

• Two 2.1MHz Current-Mode Converters with Forced

Fixed Frequency and Skip Modes

The IC features the power-OK indicators and undervolt-

age 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.

• Thermally Enhanced 5mm x 5mm, 28-Pin TQFN-

EP Package

● Protection Features Improve System Reliability

• Supply Undervoltage Lockout

• Overtemperature and Short-Circuit Protection

Applications

● Automotive Start-Stop System

Ordering Information appears at end of data sheet.

● Instrument Cluster

● Distributed DC Power Systems

● Navigation and Radio Head Units

19-100476; Rev 3; 11/19

12 3 4 5 6 7...17

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与MAX20457相关器件

型号	品牌	获取价格	描述	数据表
MAX20457ATIA	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20457ATIB	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20457ATIC	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20457ATID	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20457ATIE	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20457ATIF	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20457ATIG	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20457ATIH	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20457ATII	MAXIM	获取价格	High-Efficiency, 36V, Dual Synchronous Buck Converters (3.5A/2A) for Automotive Applicatio
MAX20458	ADI	获取价格	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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