ZHCSA32C JULY   2012  – April 2019 TPS53015

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化应用
  4. 4 修订历史记录
  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 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 Drivers
      2. 7.3.2 5-Volt Regulator
      3. 7.3.3 Soft-Start and Pre-biased Soft-Start Time
      4. 7.3.4 Overcurrent Protection
      5. 7.3.5 Overvoltage and Undervoltage Protection
      6. 7.3.6 UVLO Protection
      7. 7.3.7 Thermal Shutdown
      8. 7.3.8 Power Good
    4. 7.4 Device Functional Modes
      1. 7.4.1 PWM Operation
      2. 7.4.2 Auto-skip Eco-Mode Control
  8. 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 Determine the Inductance Value
        2. 8.2.2.2 Output Capacitor
        3. 8.2.2.3 Input Capacitor
        4. 8.2.2.4 Bootstrap Capacitor
        5. 8.2.2.5 VREG5 Capacitor
        6. 8.2.2.6 Choose Output Voltage Resistors
      3. 8.2.3 Application Curves
  9. 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 商标
    2. 11.2 静电放电警告
    3. 11.3 术语表
  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

8.2.2.1 Determine the Inductance Value

The inductance value is selected to provide approximately 30% peak to peak ripple current at maximum load. Larger ripple current increases output ripple voltage, improve signal-to-noise ratio and contribute to stable operation. Use Equation 3 to calculate te value for LOUT.

Equation 3. TPS53015 eq4_slvsbf1.gif

The inductor current ratings must support both the RMS (thermal) current and the peak (saturation) current. The RMS and peak inductor current can be estimated as shown in Equation 4.

    Equation 4. TPS53015 eq5_slvsbf1.gif
Equation 5. TPS53015 eq6_slvsbf1.gif
Equation 6. TPS53015 eq7_slvsbf1.gif

NOTE

Equation 6 serves as a general reference. To further improve transient response, the output inductance could be reduced further but must be considered along with the selection of the output capacitor.