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MAX17545：4.5V–42V, 1.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter With Internal Compensation

Wide Input Voltage, 1.7A Internal FET Synchronous Buck Converter Ideal for Industrial Applications

The MAX17545 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.5V to 42V input. The converter can deliver up to 1.7A 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 MAX17545 uses peak-current-mode control. The device can be operated in 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

MAX17545: Typical Operating Circuit 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

关键参数

开发工具

• MAX17545EVKITA
• MAX17545EVKITB

技术资料

• EE-SIM Design and Simulation Environment User Guide

质量和环境数据

• MAX17545.pdf

相关产品

• MAX17543：4.5V-42V, 2.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

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