SLVSBF1A May   2012  – February 2019 TPS53014

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Recommended Operating Conditions
    3. 6.3 Thermal Information
    4. 6.4 Electrical Characteristics
    5. 6.5 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 PWM Operation
      2. 7.3.2 Auto-Skip Eco-Mode Control
      3. 7.3.3 Drivers
      4. 7.3.4 5-Volt Regulator
      5. 7.3.5 Soft Start and Pre-Biased Soft Start
      6. 7.3.6 Overcurrent Protection
      7. 7.3.7 Over/Undervoltage Protection
      8. 7.3.8 UVLO Protection
      9. 7.3.9 Thermal Shutdown
  8. 8 Application and Implementation
    1. 8.1 Typical Application
      1. 8.1.1 Detailed Design Procedure
        1. 8.1.1.1 Component Selection
          1. 8.1.1.1.1 Inductor
          2. 8.1.1.1.2 Output Capacitor
          3. 8.1.1.1.3 Input Capacitor
          4. 8.1.1.1.4 Bootstrap Capacitor
          5. 8.1.1.1.5 VREG5 Capacitor
          6. 8.1.1.1.6 Choose Output Voltage Resistors
  9. 9 Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Community Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary

Package Options

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

8.1.1.1.1 Inductor

The inductance value is selected to provide approximately 30% peak to peak ripple current at maximum load. Larger ripple current increases output ripple voltage, improve S/N ratio and contribute to stable operation. Equation 4 can be used to calculate te value for LOUT.

Equation 4. TPS53014 eq4_slvsbf1.gif

The inductors current ratings needs to support both the RMS (thermal) current and the peak (saturation) current. The RMS and peak inductor current can be estimated as follows:

    Equation 5. TPS53014 eq5_slvsbf1.gif
Equation 6. TPS53014 eq6_slvsbf1.gif
Equation 7. TPS53014 eq7_slvsbf1.gif

Note:

The calculation above shall serve as a general reference. To further improve transient response, the output inductance could be reduced further. This needs to be considered along with the selection of the output capacitor.