ZHCSMN1A December   2015  – January 2021 TPS62097

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommend Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 100% Duty Cycle Mode
      2. 8.3.2 Switch Current Limit and Hiccup Short Circuit Protection
      3. 8.3.3 Undervoltage Lockout (UVLO)
      4. 8.3.4 Thermal Shutdown
    4. 8.4 Device Function Modes
      1. 8.4.1 Enable and Disable (EN)
      2. 8.4.2 Power Save Mode and Forced PWM Mode (MODE)
      3. 8.4.3 Soft Start-up (SS/TR)
      4. 8.4.4 Voltage Tracking (SS/TR)
      5. 8.4.5 Power Good (PG)
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 1.2-V Output Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Setting the Output Voltage
        2. 9.2.2.2 Output Filter Design
        3. 9.2.2.3 Inductor Selection
        4. 9.2.2.4 Capacitor Selection
      3. 9.2.3 Application Performance Curves
      4. 9.2.4 Coincidental Voltage Tracking
        1. 9.2.4.1 Design Requirements
        2. 9.2.4.2 Detailed Design Procedure
        3. 9.2.4.3 Application Performance Curve
      5. 9.2.5 Switching Frequency Selection
        1. 9.2.5.1 Design Requirements
        2. 9.2.5.2 Detailed Design Procedure
        3. 9.2.5.3 Application Performance Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
      1. 11.2.1 Thermal Information
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 第三方产品免责声明
    2. 12.2 支持资源
    3. 12.3 接收文档更新通知
    4. 12.4 Trademarks
    5. 12.5 静电放电警告
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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

9.2.2.3 Inductor Selection

The main parameters for the inductor selection are the inductor value and the saturation current. To calculate the maximum inductor current under static load conditions, Equation 5 is given.

Equation 5. GUID-B3B6D6B7-0FC8-47F9-B456-01FAB0072F0F-low.gif

Where:

IOUT,MAX = Maximum output current
ΔIL = Inductor current ripple
fSW = Switching frequency
L = Inductor value

TI recommends to choose the saturation current for the inductor 20% to 30% higher than the IL,MAX, out of Equation 5. A higher inductor value is also useful to lower ripple current but increases the transient response time as well. The following inductors are recommended to be used in designs.

Table 9-4 List of Recommended Inductors
INDUCTANCE
[µH]		CURRENT RATING
[A]		DIMENSIONS
L x W x H [mm3]		DC RESISTANCE
[mΩ TYP]		PART NUMBER(1)
15.44.0x4.0x2.011COILCRAFT XFL4020-102ME
15.32.5x2.0x1.233TOKO DFE252012F-1R0M
13.42.0x1.2x1.062TOKO DFE201210S-1R0M
15.13.0x3.0x1.243TAIYO YUDEN MDMK3030T1R0MM
14.22.5x2.0x1.243CYNTEC SDEM25201B-1R0MS-79
12.62.5x2.0x1.248Murata LQH2HPN1R0NJR
16.63.0x3.0x1.242Wurth Electronics 74438334010