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

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.

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
MAX17543: Block Diagram
MAX17543: Block Diagram
应用
  • 基站电源
  • 配电稳压
  • 通用负载点电源
  • 高压单板系统
  • 工业电源
数据手册DataSheet
语言下载文件备注
英文MAX17543.pdfRev 1; 07/2016
关键参数
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
MAX175434.5420.936Resistor2.5InternalYesYes12200EE-SimTQFN/20$1.59 @1k
开发工具
技术资料
质量和环境数据
相关产品
  • MAX17503:4.5V-60V、2.5A、高效、同步降压型DC-DC转换器,带内部补偿
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX17543ATP+生产中TQFN,;20引脚;16.8mm²-40°C至+125°CRoHS/无铅:无铅
MAX17543ATP+T生产中TQFN,;20引脚;16.8mm²-40°C至+125°CRoHS/无铅:无铅
MAX17543.pdf MAX17543
MAX17543.pdf MAX17543
MAX17543.pdf MAX17543
EE-SIM Design and Simulation Environment User Guide MAX17681
MAX17543.pdf MAX17543