ZHCSHN7B February   2018  – April 2018 TPSM84624

PRODUCTION DATA.  

  1. 特性
  2. 应用
    1.     简化原理图
  3. 说明
    1.     瞬态响应
  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 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics (VIN = 12 V)
    8. 6.8 Typical Characteristics (VIN = 5 V)
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Adjusting the Output Voltage
      2. 7.3.2  Switching Frequency (RT)
      3. 7.3.3  Synchronization (CLK)
      4. 7.3.4  Output On/Off Enable (EN)
      5. 7.3.5  Input Capacitor Selection
      6. 7.3.6  Output Capacitor Selection
      7. 7.3.7  TurboTrans (TT)
        1. 7.3.7.1 Low-ESR Output Capacitors
        2. 7.3.7.2 Transient Response
          1. 7.3.7.2.1 Transient Waveforms (VIN = 12 V)
      8. 7.3.8  Undervoltage Lockout (UVLO)
      9. 7.3.9  Soft Start (SS/TR)
      10. 7.3.10 Sequencing (SS/TR)
      11. 7.3.11 Power Good (PGOOD)
      12. 7.3.12 Safe Start-Up Into Pre-Biased Outputs
      13. 7.3.13 Overcurrent Protection
      14. 7.3.14 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active Mode
      2. 7.4.2 Shutdown Mode
  8. Application and Implementation
    1. 8.1 Application Information
    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 Output Voltage Setpoint
        3. 8.2.2.3 Setting the Switching Frequency
        4. 8.2.2.4 Input Capacitors
        5. 8.2.2.5 Output Capacitors
        6. 8.2.2.6 TurboTrans Resistor
        7. 8.2.2.7 Application Waveforms
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 EMI
      1. 10.3.1 EMI Plots
    4. 10.4 Package Specifications
  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. 11.2 使用 WEBENCH® 工具创建定制设计
    3. 11.3 接收文档更新通知
    4. 11.4 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 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

TurboTrans (TT)

The TPSM84624 includes the TurboTrans feature which optimizes the transient response of the converter while simultaneously reducing the quantity of external output capacitors required to meet a target voltage deviation specification. A TurboTrans resistor, RTT, is required between the TT pin and AGND to properly set the response of the TPSM84624 based on the amount and type of output capacitors. The value of RTT can be calculated using Equation 3. In order to calculate the RTT value, a TurboTrans constant, KTT, is required. See Table 5 for the KTT value when using only ceramic output capacitors. See Table 6 for the KTT value when using a combination of ceramic and polymer output capacitors. Also, the value of CO used in Equation 3 is the total effective output capacitance, which takes into account the effects of applied voltage and temperature.

Equation 3. TPSM84624 RttEq2.gif

Table 5. KTT Values (Ceramic Only Output Capacitors)

VOUT (V) 1 - < 1.2 1.2 - < 1.5 1.5 - < 1.8 1.8 - < 2 2 - < 2.5 2.5 - < 3.3 3.3 - < 7.5 7.5 - 10
KTT 1 1.12 1.4 1.5 1.65 1.8 2.0 2.25

Table 6. KTT Values (Ceramic + Polymer Output Capacitors)

VOUT (V) 0.6 - < 0.7 0.7 - < 0.9 0.9 - < 1 1 - < 2.5 2.5 - < 3.3 3.3 - < 5 5 - < 6 6 - < 7.5 7.5 - 10
KTT 0.6 0.65 0.7 0.6 0.72 0.9 1.2 1.5 1.8