ZHCSCB9D April   2014  – December 2019 TPS22965-Q1

PRODUCTION DATA.  

  1. 特性
  2. 应用
  3. 说明
    1.     Device Images
      1.      简化电路原理图
      2.      RON 与 VIN 之间的关系(VBIAS = 5V,IOUT = –200mA)
  4. 修订历史记录
  5. Device Comparison Table
  6. Pin Configuration and Functions
    1.     Pin Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics—VBIAS = 5 V
    6. 7.6 Electrical Characteristics—VBIAS = 2.5 V
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
      1. 7.8.1 Typical DC Characteristics
      2. 7.8.2 Typical Switching Characteristics
  8. Parameter Measurement Information
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Adjustable Rise Time
      2. 9.3.2 Quick Output Discharge (TPS22965-Q1 and TPS22965W-Q1 Only)
      3. 9.3.3 Low Power Consumption During Off State
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 VIN to VOUT Voltage Drop
      2. 10.1.2 On and Off Control
      3. 10.1.3 Input Capacitor (Optional)
      4. 10.1.4 Output Capacitor (Optional)
      5. 10.1.5 VIN and VBIAS Voltage Range
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Inrush Current
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Consideration
  13. 13器件和文档支持
    1. 13.1 文档支持
      1. 13.1.1 相关文档
    2. 13.2 接收文档更新通知
    3. 13.3 社区资源
    4. 13.4 商标
    5. 13.5 静电放电警告
    6. 13.6 Glossary
  14. 14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

Inrush Current

When the switch is enabled, the output capacitors must be charged up from 0-V to the set value (3.3 V in this example). This charge arrives in the form of inrush current. Inrush current can be calculated using Equation 3.

Equation 3. Inrush Current = C × dV/dt

where

  • C = output capacitance
  • dV = output voltage
  • dt = rise time

The TPS22965x-Q1 offers adjustable rise time for VOUT. This feature allows the user to control the inrush current during turn-on. The appropriate rise time can be calculated using the design requirements and the inrush current equation. See Equation 4 and Equation 5.

Equation 4. 400 mA = 22 µF × 3.3 V / dt
Equation 5. dt = 181.5 µs

To ensure an inrush current of less than 400 mA, choose a CT value that yields a rise time of more than 181.5µs. See the oscilloscope captures in the Application Curves section for an example of how the CT capacitor can be used to reduce inrush current.