概览

RAA211835 是一款 DC/DC 异步降压（Buck）稳压器，支持 4.5V 至 75V 输入电压范围和可调输出电压。 它可以提供高达 3A 的连续输出电流，并具有出色的负载和线性调整率性能。

RAA211835 采用峰值电流模式控制架构。 其 PWM 开关频率是可编程的，可以在瞬态响应和效率之间实现最佳平衡。 它还支持 PFM 操作，以最大限度地提高轻负载效率，此外还支持外部偏置 LDO 输入，以进一步降低整个负载范围内的功率耗散。 该稳压器还有一个内部环路补偿电路，以减少外部元件数量和 BOM 成本。

RAA211835 提供实用的功能，如：内部或可编程软启动和电源良好指示器。 为确保安全运行，RAA211835 还提供保护功能，例如：逐周期峰值和谷值电流限制、输入电压 UVLO、输出电压欠压（短路）保护和热关断保护。

RAA211835 Block Diagram
RAA211835 Typical Application Circuit
RAA211835 20 Ld QFN Pin Assignment
RAA211835 16 Ld HTSSOP Pin Assignment
RAA211835 Block Diagram
RAA211835 Typical Application Circuit
RAA211835 20 Ld QFN Pin Assignment
RAA211835 16 Ld HTSSOP Pin Assignment
  • 宽输入电压工作电压范围：4.5V 至 75V
  • 可调输出电压范围为 0.8V 至 90% 的输入电压
  • 高达 3A 的连续输出电流
  • 默认 400kHz，或 200kHz 至 800kHz 的可调开关频率
  • -40°C 至 125°C 时负载调节精度为 ±1%，25°C 时负载调节精度为 ±0.5%
  • 90μA 典型静态电流
  • 内部补偿，QFN 固定 0.5ms SS 和 HTSSOP 可调 SS
  • 可在轻负载条件下进行 PFM 操作，带有集成的外部偏置 LDO 和电源良好指示器
  • 逐周期峰值和谷值电流限制、输入电压欠压锁定、输出电压欠压（短路）保护和热关断功能

应用

  • 高达 75V 的分布式电源和通用 POL
  • 电信基站电源
  • 电动工具
  • 监测
  • 便携式移动/机器人设备
  • 工业电力系统

文档

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类型 文档标题 日期
数据手册
RAA211835 Datasheet
PDF 3.80 MB
1 item

设计和开发

软件与工具
iSim:PE 离线模拟工具
iSim Personal Edition（iSim:PE ）可加快设计周期并降低项目早期风险，确定可用于当前和下一代设计的部件。
下载
RAA211835 iSim:PE Model
 Simulator 瑞萨电子
1 item

软件下载
类型 文档标题 日期
软件和工具 - 其他
RAA211630 Family Design Tool
登录后下载 XLSX 312 KB
1 item
RTKA211835DE0000BU

RTKA211835DE0000BU

评估
了解更多

RAA211835 Synchronous Buck Evaluation Board with 4.5V to 75V Input Range, 3.3V 3A Output (QFN version)

The RTKA211835DE0000BU board demonstrates and quickly evaluates the RAA211835 (QFN version), a DC/DC asynchronous step-down regulator with programmable switching...

特色文件:
RTKA211835DE0000BU Evaluation Board Manual
RTKA211835DE0010BU

RTKA211835DE0010BU

评估
了解更多

RAA211835 Synchronous Buck Evaluation Board with 4.5V to 75V Input Range, 3.3V 3A Output (HTSSOP version)

The RTKA211835DE0010BU board demonstrates and quickly evaluates the RAA211835 (HTSSOP version), a DC/DC asynchronous step-down regulator with programmable switching...

特色文件:
RTKA211835DE0010BU Evaluation Board Manual

ECAD 模块

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

扩展 ECAD 模块
Diagram of ECAD Models

产品选择

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    购买 / 样片
    器件号
    RAA211835GNP#HA0
    circle有效
    memory
    view_in_ar
    可提供样片
    立即购买
    		QFN Reel 3 1.968 获取样片,
    RAA211835GSP#HA0
    circle有效
    memory
    spa
    view_in_ar
    可提供样片
    立即购买
    		TSSOP-EP Reel 3 1.968 获取样片,
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    视频和培训

    Portfolio of 30V-75V Bucks Power the Highest-Precision Loads with Excellent Accuracy

    The RAA211x family of bucks are highly scalable due to its unique pin-compatible wide Vin buck variants with integrated FETs that support up to 5A of continuous output current with premium load and line regulation performance. The RAA211835 supports 75V async buck operation of 3A loadings, while RAA211250/450/630/820 support sync buck operation of 30V 5A, 40V 5A, 60V 3A, 75V 2A respectively.

    Video List
    Portfolio of 30V-75V Bucks Power the Highest-Precision Loads with Excellent Accuracy

    新闻和博客

    博客 2023年5月8日