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Analog Devices / Maxim Integrated MAX17543/44/45 降压直流-直流转换器

美信 MAX17543/44/45 高效同步降压型直流-直流转换器是集成了 MOSFET 的高效率、高压、同步降压型直流-直流转换器，采用 4.5V 到 42V 的输入进行工作。该转换器可提供 1.7A, 2.5A 或 3.5A 的电流，并产生从 0.9V 到高达 0.9 倍 VIN 的输出电压。在 -40°C 到 +125°C 的范围内，反馈（FB）电压精确到 ±1.1% 以内。MAX17543/44/45 采用峰值电流模式控制。该器件可采用脉宽调制（PWM）、脉冲频率调制（PFM）、或断续导通模式等控制方式工作。

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 RESET
    • Programmable EN/UVLO threshold
    • Monotonic startup into prebiased load
    • Overtemperature protection
    • -40°C to +125°C Operation

应用

  • Industrial power supplies
  • Distributed supply regulation
  • High-voltage single-board systems
  • Base station power supply
  • General-purpose point-of-load

Block Diagram

框图 - Analog Devices / Maxim Integrated MAX17543/44/45 降压直流-直流转换器
View Results ( 6 ) Page
物料编号 数据表 系列 描述 输出电流 开关频率
MAX17544ATP+ MAX17544ATP+ 数据表 MAX17544 开关稳压器 4.5V 42V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation 3.5 A 2.2 MHz
MAX17545ATP+T MAX17545ATP+T 数据表 MAX17545 开关稳压器 4.5V 42V, 1.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter With Internal Compensation 1.7 A 2.2 MHz
MAX17543ATP+ MAX17543ATP+ 数据表 MAX17543 开关稳压器 2.5A, 60V, Synchronous Buck Regulator 2.5 A 100 kHz to 2.2 MHz
MAX17543ATP+T MAX17543ATP+T 数据表 MAX17543 开关稳压器 2.5A, 60V, Synchronous Buck Regulator 2.5 A 100 kHz to 2.2 MHz
MAX17544ATP+T MAX17544ATP+T 数据表 MAX17544 开关稳压器 4.5V 42V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation 3.5 A 100 kHz to 2.2 MHz
MAX17545ATP+ MAX17545ATP+ 数据表 MAX17545 开关稳压器 4.5V 42V, 1.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter With Internal Compensation 1.7 A 2.2 MHz
发布日期: 2014-10-23 | 更新日期: 2023-04-12