SLVSAE8F September   2011  – November 2016 TPS62080 , TPS62080A , TPS62081 , TPS62082

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended 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 Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Power Good
      2. 8.3.2 100% Duty Cycle Low Dropout Operation
      3. 8.3.3 Output Discharge
      4. 8.3.4 Soft-Start
      5. 8.3.5 Undervoltage Lockout
      6. 8.3.6 Thermal Shutdown
      7. 8.3.7 Inductor Current Limit
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enabling and Disabling the Device
      2. 8.4.2 Power Save Mode
      3. 8.4.3 Snooze Mode
  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 Setting the Output Voltage
          1. 9.2.2.1.1 Adjustable Output Voltage Version
        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 Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Receiving Notification of Documentation Updates
    5. 12.5 Community Resources
    6. 12.6 Trademarks
    7. 12.7 Electrostatic Discharge Caution
    8. 12.8 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

11 Layout

11.1 Layout Guidelines

The PCB layout is an important step to maintain the high performance of the TPS6208x devices.

The input/output capacitors and the inductor should be placed as close as possible to the IC. This keeps the traces short. Routing these traces direct and wide results in low trace resistance and low parasitic inductance. A common power GND should be used. The low-side of the input and output capacitors must be connected properly to the power GND to avoid a GND potential shift.

The sense traces connected to the FB and VOS pins are signal traces. Special care should be taken to avoid noise being induced. By a direct routing, parasitic inductance can be kept small. GND layers might be used for shielding. Keep these traces away from SW nodes.

11.2 Layout Example

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TPS62080 TPS62080A TPS62081 TPS62082 SLVSAE8_layout_new.gif Figure 31. PCB Layout Suggestion

11.3 Thermal Considerations

Implementation of integrated circuits in low-profile and fine-pitch surface-mount packages typically requires special attention to power dissipation. Many system-dependent issues such as thermal coupling, airflow, added heat sinks and convection surfaces, and the presence of other heat-generating components affect the power-dissipation limits of a given component.

Three basic approaches for enhancing thermal performance are listed below:

  • Improving the power dissipation capability of the PCB design
  • Improving the thermal coupling of the component to the PCB by soldering Exposed Thermal Pad
  • Introducing airflow in the system

For more details on how to use the thermal parameters, see the application notes: Thermal Characteristics of Linear and Logic Packages Using JEDEC PCB Designs (SZZA017) and Semiconductor and IC Package Thermal Metrics (SPRA953).