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MAX17543

MAX17543

4.5V-42V, 2.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

Wide Input Voltage, 2.5A Internal FET Synchronous Buck Converter Ideal for Industrial Applications

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概述

说明

The MAX17543 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 42V input. The converter can deliver up to 2.5A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.1% over -40°C to +125°C.

The MAX17543 uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.

The device is available in a 20-pin (4mm × 4mm) TQFN package. Simulation models are available.
MAX17543: Block Diagram MAX17543: Block Diagram 放大+

关键特性

  • Reduces External Components and Total Cost
    • No Schottky—Synchronous Operation
    • Internal Compensation for Any Output Voltage
    • Built-In Soft-Start
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 42V Input
    • Adjustable 0.9V to 0.9 x VIN Output
    • 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
  • Reduces Power Dissipation
    • Peak Efficiency >90%
    • PFM/DCM Enables Enhanced Light-Load Efficiency
    • 2.8µA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Peak Current-Limit Protection
    • Built-In Output Voltage Monitoring with Active-Low RESET
    • Programmable EN/UVLO Threshold
    • Monotonic Startup into Prebiased Load
    • Overtemperature Protection
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

应用

  • 基站电源
  • 配电稳压器
  • 通用负载点电源
  • 高压单板系统
  • 工业电源

参数规格

Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		Output Adjust. MethodIOUT1
(A)		Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)		Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX17543 4.5420.936Resistor2.5InternalYesYes12200EE-Sim
TQFN-CU/20
$1.67 @1k
查看所有Step-Down Switching Regulators (404)
Pricing Notes:
价格仅供参考，用于同类产品的比较。所提供报价为美元，需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题，请参考：价格与供货网站或与指定代理商联系。

设计资源


MAX17543EVKITA: Evaluation Kit for the MAX17543 in 3.3V Output-Voltage Application
MAX17543EVKITB: MAX17543 5V输出电压评估板

技术资料

用户指南 5861 EE-SIM Design and Simulation Environment User Guide

质量和环境数据

产品可靠性报告: MAX17543.pdf 
无铅封装的锡（Sn）晶须报告

工具和模型

  • EE-Sim: MAX17543 设计和仿真
  • MAX17543 SIMPLIS Schematic

    •

    质量与环境

    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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    工具和模型

    技术文档

    类型 编号 PDF 标题
    用户指南 5861 EE-SIM Design and Simulation Environment User Guide

    参考设计

    类型 编号 标题
    评估板8628MAX17543EVKITB MAX17543 5V输出电压评估板
    评估板8553MAX17543EVKITA Evaluation Kit for the MAX17543 in 3.3V Output-Voltage Application