SGLS380H September   2008  – July 2015 TL720M05-Q1

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Regulated Output (OUT)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Low-Voltage Tracking
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Thermal Consideration
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • KVU|3
  • PWP|20
  • KTT|3
散热焊盘机械数据 (封装 | 引脚)
订购信息

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

Based on the end-application, different values of external components can be used. An application can require a larger output capacitor during fast load steps to prevent a reset from occurring. TI recommends a low-ESR ceramic capacitor with a dielectric of type X5R or X7R for better load transient response.

9.2 Typical Application

Figure 14 shows typical application circuits for the TL720M05-Q1 device.

TL720M05-Q1 tl720m05_diag_sgls380.gifFigure 14. Typical Application Diagram

9.2.1 Design Requirements

For this design example, use the parameters listed in Table 1.

Table 1. Design Parameters

DESIGN PARAMETER EXAMPLE VALUE
Input voltage range 4 to 40 V
Output voltage 5 V
Output current rating 400 mA
Output capacitor range 10 to 500 μF
Output capacitor ESR range 1 mΩ to 20 Ω

9.2.2 Detailed Design Procedure

To begin the design process, determine the following:

  • Input voltage range
  • Output voltage
  • Output current rating
  • Output capacitor

9.2.2.1 Thermal Consideration

Calculate the power dissipated by the device according to the following formula:

Equation 1. PT = IO × (VI – VO) + VI x IQ

where

  • PT = Total power dissipation of the device.
  • IO = output current
  • VI = input voltage
  • VO = output voltage

After determining the power dissipated by the device, calculate the junction temperature from the ambient temperature and the device thermal impedance.

Equation 2. TJ = TA + RθJA x PT

9.2.3 Application Curves

TL720M05-Q1 wvfrm_01_sgls380.pngFigure 15. CH1: Vin, CH2: Vout Power Up Waveform (Load = 50 mA)
TL720M05-Q1 wvfrm_02_sgls380.pngFigure 16. CH1: Vin, CH2: Vout Power Down Waveform (Load = 50mA)