ZHCS155B NOVEMBER   2013  – December 2014 TPS40170

PRODUCTION DATA.  

  1. 特性
  2. 应用
  3. 说明
    1.     Device Images
      1.      简化应用
      2.      效率与负载电流间的关系
  4. 修订历史记录
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  LDO Linear Regulators and Enable
      2. 7.3.2  Input Undervoltage Lockout (UVLO)
        1. 7.3.2.1 Equations for Programming the Input UVLO:
      3. 7.3.3  Oscillator and Voltage Feed-Forward
        1. 7.3.3.1 Calculating the Timing Resistance (RRT)
      4. 7.3.4  Overcurrent Protection and Short-Circuit Protection (OCP and SCP)
      5. 7.3.5  Soft-Start and Fault-Logic
        1. 7.3.5.1 Soft-Start During Overcurrent Fault
        2. 7.3.5.2 Equations for Soft-Start and Restart Time
      6. 7.3.6  Over-Temperature Fault
      7. 7.3.7  Tracking
      8. 7.3.8  Adaptive Drivers
      9. 7.3.9  Start-Up into Pre-Biased Output
      10. 7.3.10 Powergood (PGOOD)
      11. 7.3.11 PGND and AGND
    4. 7.4 Device Functional Modes
      1. 7.4.1 Frequency Synchronization
      2. 7.4.2 Operation Near Minimum VIN (VVIN ≤ 4.5 V)
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Bootstrap Resistor
      2. 8.1.2 SW Node Snubber Capacitor
      3. 8.1.3 Input Resistor
      4. 8.1.4 LDRV Gate Capacitor
    2. 8.2 Typical Application
      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  List of Materials
        3. 8.2.2.3  Select a Switching Frequency
        4. 8.2.2.4  Inductor Selection (L1)
        5. 8.2.2.5  Output Capacitor Selection (C9)
        6. 8.2.2.6  Peak Current Rating of Inductor
        7. 8.2.2.7  Input Capacitor Selection (C1, C6)
        8. 8.2.2.8  MOSFET Switch Selection (Q1, Q2)
        9. 8.2.2.9  Timing Resistor (R7)
        10. 8.2.2.10 UVLO Programming Resistors (R2, R6)
        11. 8.2.2.11 Boot-Strap Capacitor (C7)
        12. 8.2.2.12 VIN Bypass Capacitor (C18)
        13. 8.2.2.13 VBP Bypass Capacitor (C19)
        14. 8.2.2.14 VDD Bypass Capacitor (C16)
        15. 8.2.2.15 SS Timing Capacitor (C15)
        16. 8.2.2.16 ILIM Resistor (R9, C17)
        17. 8.2.2.17 SCP Multiplier Selection (R5)
        18. 8.2.2.18 Feedback Divider (R10, R11)
        19. 8.2.2.19 Compensation: (R4, R13, C13, C14, C21)
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 相关器件
    2. 11.2 文档支持
      1. 11.2.1 使用 WEBENCH 工具定制设计方案
      2. 11.2.2 Receiving Notification of Documentation Updates
      3. 11.2.3 相关文档
    3. 11.3 商标
    4. 11.4 静电放电警告
    5. 11.5 Glossary
  12. 12机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

特性

  • 4.5V 至 60V 宽输入电压范围
  • 600mV 基准电压,精确度 1%
  • 可编程 UVLO 与迟滞功能
  • 具有电压前馈的电压模式控制
  • 100kHz 与 600kHz 间的可编程频率
  • 具有主/从选项的双向频率同步
  • 具有集成型热补偿的低侧 FET 传感过流保护与高侧 FET 传感短路保护
  • 可编程闭环软启动
  • 支持预偏置输出
  • 165°C 热关断,具有迟滞功能
  • 电压跟踪
  • 电源正常
  • 支持 1µA 低电流关断
  • 8.0V 与 3.3V LDO 输出
  • 集成型自举二极管
  • 20 引脚 3.5mm × 4.5mm VQFN (RGY) 封装
  • 使用 TPS40170 并借助 WEBENCH 电源设计器创建定制设计方案