SLVSA31A November   2009  – December 2014 TPS61029-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
  9. 9 Typical Characteristics
  10. 10Parameter Measurement Information
  11. 11Detailed Description
    1. 11.1 Functional Block Diagram (TPS61029)
    2. 11.2 Feature Description
      1. 11.2.1 Controller Circuit
        1. 11.2.1.1 Synchronous Rectifier
        2. 11.2.1.2 Down Regulation
        3. 11.2.1.3 Device Enable
        4. 11.2.1.4 Softstart and Short Circuit Protection
        5. 11.2.1.5 Low Battery Detector Circuit—LBI/LBO
        6. 11.2.1.6 Low-EMI Switch
    3. 11.3 Device Functional Modes
      1. 11.3.1 Undervoltage Lockout
      2. 11.3.2 Power Save Mode
    4. 11.4 Programming
      1. 11.4.1 Programming the Output Voltage
      2. 11.4.2 Programming the LBI/LBO Threshold Voltage
  12. 12Application and Implementation
    1. 12.1 Application Information
      1. 12.1.1 Application Examples
    2. 12.2 Typical Application
      1. 12.2.1 Design Requirements
        1. 12.2.1.1 Inductor Selection
        2. 12.2.1.2 Input Capacitor
        3. 12.2.1.3 Output Capacitor
      2. 12.2.2 Detailed Design Procedure
        1. 12.2.2.1 Small Signal Stability
        2. 12.2.2.2 Thermal Information
      3. 12.2.3 Application Curves
  13. 13Power Supply Recommendations
  14. 14Layout
    1. 14.1 Layout Guidelines
    2. 14.2 Layout Example
  15. 15Device and Documentation Support
    1. 15.1 Documentation Support
      1. 15.1.1 Third-Party Products Disclaimer
    2. 15.2 Related Links
    3. 15.3 Trademarks
    4. 15.4 Electrostatic Discharge Caution
    5. 15.5 Glossary
  16. 16Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DPN|10
  • DRC|10
Thermal pad, mechanical data (Package|Pins)
Orderable Information

14 Layout

14.1 Layout Guidelines

  • As for all switching power supplies, the layout is an important step in the design, especially at high peak currents and high switching frequencies.
  • If the layout is not carefully done, the regulator could show stability problems as well as EMI problems. Therefore, use wide and short traces for the main current path and for the power ground tracks.
  • The input capacitor, output capacitor, and the inductor should be placed as close as possible to the IC.
  • Use a common ground node for power ground and a different one for control ground to minimize the effects of ground noise. Connect these ground nodes at any place close to one of the ground pins of the IC.
  • The feedback divider should be placed as close as possible to the control ground pin of the IC.
  • To lay out the control ground, it is recommended to use short traces as well, separated from the power ground traces. This avoids ground shift problems, which can occur due to superimposition of power ground current and control ground current.

14.2 Layout Example

TPS61029_layout2_SLVSA31.gifFigure 26. Layout