SLVU264A November   2008  – October 2021 TPS54233

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Set Point
  3. 2Test Setup and Results
    1. 2.1 Input / Output Connections
    2. 2.2 Efficiency
    3. 2.3 Output Voltage Load Regulation
    4. 2.4 Output Voltage 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
  4. 3Board Layout
    1. 3.1 Layout
    2. 3.2 Estimated Circuit Area
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
  6. 5Revision History

1.3.1 Output Voltage Set Point

To change the output voltage of the EVM, it is necessary to change the value of resistor R6. Changing the value of R6 can change the output voltage above 0.8 V. The value of R6 for a specific output voltage can be calculated using Equation 1.

Equation 1. GUID-68AF6AC1-9B7D-49C3-B1CA-18D53218D11E-low.gif

Table 1-3 lists the R6 values for some common output voltages. Note that VIN must be in a range so that the minimum on-time is greater than 160 ns, and the maximum duty cycle is less than 90%. The values given in Table 1-3 are standard values, not the exact value calculated using Equation 1.

Table 1-3 Output Voltages Available
Output Voltage (V)R6 Value (kΩ)
1.88.25
2.54.75
3.33.24
51.96