SLVU985A January   2014  – August 2021 TPS562200

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Setpoint
  5. 4Test Setup and Results
    1. 4.1  Input/Output Connections
    2. 4.2  Start-Up Procedure
    3. 4.3  Efficiency
    4. 4.4  Load Regulation
    5. 4.5  Line Regulation
    6. 4.6  Load Transient Response
    7. 4.7  Output Voltage Ripple
    8. 4.8  Input Voltage Ripple
    9. 4.9  Start-Up
    10. 4.10 Shut-Down
  6. 5Board Layout
    1. 5.1 Layout
  7. 6Schematic, Bill of Materials, and Reference
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
    3. 6.3 Reference
  8. 7Revision History

Output Voltage Setpoint

To change the output voltage of the EVMs, it is necessary to change the value of resistor R5. Changing the value of R5 can change the output voltage above 0.765 V. The value of R5 for a specific output voltage can be calculated using Equation 1.

Equation 1. GUID-6A835D97-BC87-4EB1-A914-16E0432289DC-low.gif

Table 3-1 lists the R5 values for some common output voltages. For higher output voltages of 1.8 V or above, a feedforward capacitor (C9) may be used to improve phase margin. Pads for this component (C9) are provided on the printed-circuit board. Note that the values given in Table 3-1 are standard values and not the exact value calculated using Table 3-1.

Table 3-1 Output Voltages
Output Voltage
(V)
R5
(kΩ)
R6
(kΩ)
C9
(pF)
L1
(µH)
C6 + C7 +C8
(µF)
MinTypMax
1.015.449.91.52.24.720 - 68
1.0518.749.91.52.24.720 - 68
1.228.749.91.52.24.720 - 68
1.547.549.91.52.24.720 - 68
1.868.149.9optional, 10 pF max1.52.24.720 - 68
2.511349.9optional, 10 pF max2.23.34.720 - 68
3.316549.9optional, 10 pF max2.23.34.720 - 68
5.027449.9optional, 10 pF max3.34.74.720 - 68
6.537449.9optional, 10 pF max3.34.74.720 - 68