ZHCSF94E February   2018  – July 2020 LMR23625

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Fixed-Frequency Peak-Current-Mode Control
      2. 7.3.2 Adjustable Output Voltage
      3. 7.3.3 Enable/Sync
      4. 7.3.4 VCC, UVLO
      5. 7.3.5 Minimum ON-time, Minimum OFF-time and Frequency Foldback at Drop-out Conditions
      6. 7.3.6 Internal Compensation and CFF
      7. 7.3.7 Bootstrap Voltage (BOOT)
      8. 7.3.8 Overcurrent and Short-Circuit Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
      3. 7.4.3 CCM Mode
      4. 7.4.4 Light Load Operation (PFM Option)
      5. 7.4.5 Light Load Operation (FPWM Option)
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  Custom Design With WEBENCH® Tools
        2. 8.2.2.2  Output Voltage Setpoint
        3. 8.2.2.3  Switching Frequency
        4. 8.2.2.4  Inductor Selection
        5. 8.2.2.5  Output Capacitor Selection
        6. 8.2.2.6  Feed-forward Capacitor
        7. 8.2.2.7  Input Capacitor Selection
        8. 8.2.2.8  Bootstrap Capacitor Selection
        9. 8.2.2.9  VCC Capacitor Selection
        10. 8.2.2.10 Undervoltage Lockout Set-Point
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Compact Layout for EMI Reduction
    4. 10.4 Ground Plane and Thermal Considerations
    5. 10.5 Feedback Resistors
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • DRR|12
  • DDA|8
散热焊盘机械数据 (封装 | 引脚)
订购信息

3 说明

LMR23625 SIMPLE SWITCHER® 是一款易于使用的 36V、2.5A 同步降压稳压器。该器件具有 4V-36V 的宽输入范围，适用于从非稳压源进行电源调节的各种工业应用。采用峰值电流模式控制来实现简单控制环路补偿和逐周期电流限制。它采用 75μA 的静态电流，因此适用于电池供电系统。该器件具有 2μA 的超低关断电流，可进一步延长电池使用寿命。内部环路补偿意味着用户不用承担设计环路补偿组件的枯燥工作。这样还能够最大限度地减少外部元件数。该器件可选用固定频率 FPWM 模式，在轻负载情况下实现小输出电压纹波。HSOIC 的扩展系列产品能够以引脚到引脚兼容封装提供 1A (LMR23610) 和 3A (LMR23630) 负载电流选项，实现简单且优化的 PCB 布局。利用精密使能端输入可以简化稳压器控制和系统电源时序。保护特性包括逐周期电流限制、间断模式短路保护和过多功率耗散而引起的热关断。

器件信息
器件型号 (1) 封装 封装尺寸（标称值）
LMR23625 HSOIC (8) 4.89mm × 3.90mm
WSON (12) 3.00mm × 3.00mm
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。

GUID-21DFAF87-FFC5-4AE9-A855-F69A5E772A4E-low.gif简化原理图
GUID-AF1D31B4-D8EE-4F27-8332-5C8E31B2645A-low.gif效率与负载间的关系 VIN = 12V，PFM 选项