SGLS276D January   2005  – March 2016 TPS61040-Q1 , TPS61041-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and 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 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Peak Current Control
      2. 7.3.2 Soft Start
      3. 7.3.3 Enable
      4. 7.3.4 Undervoltage Lockout
      5. 7.3.5 Thermal Shutdown
    4. 7.4 Device Functional Modes
  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 Inductor Selection, Maximum Load Current
        2. 8.2.2.2 Setting The Output Voltage and Feed-Forward Capacitor
        3. 8.2.2.3 Line and Load Regulation
        4. 8.2.2.4 Output Capacitor Selection
        5. 8.2.2.5 Input Capacitor Selection
        6. 8.2.2.6 Diode Selection
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Related Links
    3. 11.3 Community Resource
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, 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)
  • DBV|5
散热焊盘机械数据 (封装 | 引脚)
订购信息

10 Layout

10.1 Layout Guidelines

Typical for all switching power supplies, the layout is an important step in the design; especially at high peak currents and switching frequencies. If the layout is not carefully done, the regulator can show noise problems and duty cycle jitter.

Figure 23 provides an example of layout design with TPS6104x-Q1 device.

  • The input capacitor must be placed as close as possible to the input pin for good input voltage filtering.
  • The inductor and diode must be placed as close as possible to the switch pin to minimize the noise coupling into other circuits.
  • Keeping the switching pin and plane area short helps in minimizing the radiated emissions. It is also important to have very low impedance switch plane to reduce the switching losses and hence a trade-off must be made between these two and the switching pin and plane must be optimized.
  • Because the feedback pin and network is noise-sensitive, the feedback network must be routed away from the inductor.
  • The feedback pin and feedback network must be shielded with a ground plane or trace to minimize noise coupling into this circuit.
  • A star ground connection or ground plane minimizes ground shifts and noise.

10.2 Layout Example

TPS61040-Q1 TPS61041-Q1 TPS61040_Layout_Example_slvs413.gif Figure 23. Layout Diagram