MAX15462

42V、300mA、超小尺寸、高效、同步降压型DC-DC转换器

业内尺寸最小的高压同步Buck调节器


点击查看特定型号的库存状况。

说明

MAX15462高效、高压、同步降压型DC-DC转换器内置MOSFET,工作在4.5V至42V输入电压范围。转换器提供高达300mA输出电流,输出电压为3.3V (MAX15462A)、5V (MAX15462B)以及可调节输出电压(MAX15462C)。器件工作在-40°C至+125°C温度范围,采用紧凑的8引脚(2mm x 2mm) TDFN封装。提供仿真模式。

器件采用峰值电流模式架构,带有MODE引脚,可用于在脉宽调制(PWM)或脉冲频率调制(PFM)模式下控制器件工作。PWM工作模式在任何负载条件下都保持固定频率工作,在对开关频率变化敏感的应用中非常有用。PFM工作模式消除了负向电感电流以及轻载条件下额外的跳脉冲,以提高效率。低电阻片上MOSFET确保满载时具有高效率,以及简化PCB布局。

为降低输入浪涌电流,器件提供内部软启动。器件也具有EN/UVLO引脚,允许用户在输入电压达到相应要求时开启器件。RESET开漏引脚可以用作输出电压监测。
MAX15462: Block Diagram MAX15462: Block Diagram 放大+

关键特性

  • 无需外部元件,降低总体成本
    • 无需肖特基同步即可保持高效、低成本工作
    • 内部补偿
    • 内部反馈分压器,用于固定3.3V、5V输出电压
    • 内部软启动
    • 全部陶瓷电容、超紧凑布局
  • 减少库存直流/直流调节器数量
    • 4.5V至42V宽输入电压范围
    • 3.3V和5V固定输出电压选择
    • 0.9V至0.89 x VIN可调节输出电压
    • 提供高达300mA负载电流
    • 可配置PFM和强制PWM工作模式
  • 降低功耗
    • 最高效率达92%
    • PFM功能,轻载时效率高
    • 关断电流仅为2.2μA (典型值)
  • 在恶劣工业环境下工作可靠
    • 打嗝模式限流和自动重试启动
    • 内置输出电压监测,带有低电平有效RESET开漏引脚
    • 可编程EN/UVLO门限
    • 启动时单调进入预偏置输出
    • 过热保护
    • -40°C至+125°C汽车级/工业级温度范围

应用

  • 4–20mA电流环路
  • 通用负载点
  • 替代高压LDO
  • HVAC与楼宇控制
  • 工业传感器
  • 过程控制

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX15462AEVKIT: MAX15462评估板
MAX15462BEVKIT: MAX15462评估板
MAX15462C12EVKIT: MAX15462评估板

工具和模型

  • EE-Sim: MAX15462 设计和仿真
  • MAX15462 SIMPLIS Schematic
  • 产品可靠性报告: MAX15462.pdf 
    型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

    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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    类型 编号 标题
    评估板8794MAX15462C12EVKIT MAX15462评估板
    评估板8793MAX15462BEVKIT MAX15462评估板
    评估板8792MAX15462AEVKIT MAX15462评估板