ZHCSNL8 May   2022 LM25143-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 说明（续）
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1. 7.1 Wettable Flanks
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Switching Characteristics
    7. 8.7 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Input Voltage Range (VIN)
      2. 9.3.2  High-Voltage Bias Supply Regulator (VCC, VCCX, VDDA)
      3. 9.3.3  Enable (EN1, EN2)
      4. 9.3.4  Power-Good Monitor (PG1, PG2)
      5. 9.3.5  Switching Frequency (RT)
      6. 9.3.6  Clock Synchronization (DEMB)
      7. 9.3.7  Synchronization Out (SYNCOUT)
      8. 9.3.8  Spread Spectrum Frequency Modulation (DITH)
      9. 9.3.9  Configurable Soft Start (SS1, SS2)
      10. 9.3.10 Output Voltage Setpoint (FB1, FB2)
      11. 9.3.11 Minimum Controllable On Time
      12. 9.3.12 Error Amplifier and PWM Comparator (FB1, FB2, COMP1, COMP2)
      13. 9.3.13 Slope Compensation
      14. 9.3.14 Inductor Current Sense (CS1, VOUT1, CS2, VOUT2)
        1. 9.3.14.1 Shunt Current Sensing
        2. 9.3.14.2 Inductor DCR Current Sensing
      15. 9.3.15 Hiccup Mode Current Limiting (RES)
      16. 9.3.16 High-Side and Low-Side Gate Drivers (HO1, HO2, LO1, LO2, HOL1, HOL2, LOL1, and LOL2)
      17. 9.3.17 Output Configurations (MODE, FB2)
        1. 9.3.17.1 Independent Dual-Output Operation
        2. 9.3.17.2 Single-Output Interleaved Operation
        3. 9.3.17.3 Single-Output Multiphase Operation
    4. 9.4 Device Functional Modes
      1. 9.4.1 Standby Modes
      2. 9.4.2 Diode Emulation Mode
      3. 9.4.3 Thermal Shutdown
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Power Train Components
        1. 10.1.1.1 Buck Inductor
        2. 10.1.1.2 Output Capacitors
        3. 10.1.1.3 Input Capacitors
        4. 10.1.1.4 Power MOSFETs
        5. 10.1.1.5 EMI Filter
      2. 10.1.2 Error Amplifier and Compensation
    2. 10.2 Typical Applications
      1. 10.2.1 Design 1 – 5-V and 3.3-V Dual-Output Buck Regulator for Automotive Applications
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Custom Design With WEBENCH® Tools
          2. 10.2.1.2.2 Custom Design With Excel Quickstart Tool
          3. 10.2.1.2.3 Inductor Calculation
          4. 10.2.1.2.4 Current-Sense Resistance
          5. 10.2.1.2.5 Output Capacitors
          6. 10.2.1.2.6 Input Capacitors
          7. 10.2.1.2.7 Compensation Components
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Design 2 – Two-Phase, 15-A, 2.1-MHz Single-Output Buck Regulator for Automotive ADAS Applications
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
        3. 10.2.2.3 Application Curves
      3. 10.2.3 Design 3 – Two-Phase, 50-A, 300-kHz Single-Output Buck Regulator for High-Voltage Automotive Battery Applications
        1. 10.2.3.1 Design Requirements
        2. 10.2.3.2 Detailed Design Procedure
        3. 10.2.3.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 Power Stage Layout
      2. 12.1.2 Gate-Drive Layout
      3. 12.1.3 PWM Controller Layout
      4. 12.1.4 Thermal Design and Layout
      5. 12.1.5 Ground Plane Design
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 第三方产品免责声明
      2. 13.1.2 Development Support
        1. 13.1.2.1 Custom Design With WEBENCH® Tools
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
        1. 13.2.1.1 PCB Layout Resources
        2. 13.2.1.2 Thermal Design Resources
    3. 13.3 接收文档更新通知
    4. 13.4 支持资源
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 术语表
  14. 14Mechanical, Packaging, and Orderable Information

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1 特性

  • 符合面向汽车应用的 AEC-Q100 标准：
    • 器件温度等级 1：–40°C 至 +125°C 环境工作温度范围
  • 提供功能安全
  • 多功能同步降压直流/直流控制器
    • 宽输入电压范围为 3.5V 至 42V
    • 1% 精度、3.3V/5V 固定电压或 0.6V 至 36V 可调输出电压
    • 150°C 最大结温
    • 3.3µA 典型关断模式电流
    • 15µA 典型空载待机电流
  • 两个交错式同步降压通道
    • 双通道或单输出多相
    • 65 ns tON(min)，可实现高 VIN/VOUT 比
    • 60 ns tOFF(min)，可实现低压降
  • 固有保护特性，可实现稳健设计
    • 断续模式过流保护
    • 独立的使能和 PGOOD 功能
    • 可调节输出电压软启动
    • VCC、VDDA 和栅极驱动 UVLO 保护
    • 具有迟滞功能的热关断保护
  • 针对 CISPR 25 5 级 EMI 要求进行了优化
  • 100kHz 至 2.2 MHz 开关频率
    • 同步输入和同步输出功能
    • 可选二极管仿真或 FPWM 模式
  • 具有可润湿侧翼引脚的 VQFN-40 封装
  • 使用 LM25143-Q1 并借助 WEBENCH® Power Designer 创建定制设计方案