SNVU658B March   2020  – May 2021 TPS54J060 , TPS54J061

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Setpoint
      2. 1.3.2 Frequency and Operation Mode Setting
      3. 1.3.3 Enable Pin Selection
      4. 1.3.4 Adjustable UVLO
  3. 2Test Setup and Results
    1. 2.1  Input/Output Connections
    2. 2.2  Start Up Procedure
    3. 2.3  Efficiency
    4. 2.4  Load and Line Regulation
    5. 2.5  Load Transients
    6. 2.6  Loop Characteristics
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Powering Up and Down with EN
    10. 2.10 Powering Up and Down With VIN
    11. 2.11 Start-Up Into Pre-Bias
    12. 2.12 Current Limit
  4. 3Schematic, List of Materials, and Layout
    1. 3.1 Schematic
    2. 3.2 List of Materials
    3. 3.3 Layout
  5.   Revision History

1.3.1 Output Voltage Setpoint

The output voltage is set by a resistor divider network of R3 and R7. Keeping R7 fixed and change the output voltage of the EVM by changing the value of resistor R3. Changing the value of R3 will change the output voltage above the reference voltage VINTREF.

The value of R3 for a specific output voltage can be calculated using Equation 1

Equation 1. GUID-56DC310A-989B-44C0-8845-0D5842026AB8-low.gif

VINTREF= 0.9 V for TPS54J060

VINTREF= 0.6 V for TPS54J061

RFB_HS = R3

RFB_LS = R7