SLVSAE4A July   2010  – August 2014 TPS53128

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 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
      1. 7.2.1 16
      2. 7.2.2 17
    3. 7.3 Feature Description
      1. 7.3.1  PWM Operation
      2. 7.3.2  Light-Load Condition
      3. 7.3.3  Drivers
      4. 7.3.4  PWM Frequency And Adaptive On-Time Control
      5. 7.3.5  5-Volt Regulator
      6. 7.3.6  Soft Start
      7. 7.3.7  Pre-Bias Support
      8. 7.3.8  Output Discharge Control
      9. 7.3.9  Over Current Limit
      10. 7.3.10 Over/Under Voltage Protection
      11. 7.3.11 UVLO Protection
      12. 7.3.12 Thermal Shutdown
    4. 7.4 Device Functional Modes
  8. 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
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

10 Layout

10.1 Layout Guidelines

  • Keep the input switching current loop as small as possible.
  • Place the input capacitor (C3,C6) close to the top switching FET. The output current loop should also be kept as small as possible.
  • Keep the SW node as physically small and short as possible as to minimize parasitic capacitance and inductance and to minimize radiated emissions. Kelvin connections should be brought from the output to the feedback pin (FBx) of the device.
  • Keep analog and non-switching components away from switching components.
  • Make a single point connection from the signal ground to power ground.
  • Do not allow switching current to flow under the device.

10.2 Layout Example

TPS53128 slvsae4_layout_example.gif Figure 28.