SLVU952B September   2013  – May 2021 TPS65580

 

  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 Input Voltage Ripple
    8. 4.8 Start-Up
  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 the top resistor in the voltage set point divider network (R9, R13, and R17). Changing the value of RTOP can change the output voltage above 0.765 V. The value of RTOP for a specific output voltage can be calculated using Equation 1.

Equation 1. GUID-F311A0A2-AFF3-4F85-952C-3C578C4B22C2-low.gif

Table 3-1 lists the RTOP values for some common output voltages. A feed-forward capacitor (CFF) may be optionally used to improve phase margin. Pads for this component (C12, C18, and C24 ) 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 Equation 1.

Table 3-1 Output Voltages
Output Voltage
(V)
RTOP
(kΩ)
RBOT
(kΩ)
CFF
(pF)
LOUT
(µH)
COUT
(µF)
MinTypMax
1.0.6812.21220 - 6801.52.23.322 - 68
1.05.8252.21100 - 6801.52.23.322 - 68
1.21.272.2168 - 6801.52.23.322 - 68
1.52.102.2168 - 3301.52.23.322 - 68
1.83.012.215 - 681.52.23.322 - 68
2.54.992.215 - 222.23.34.722 - 68
3.37.322.215 - 222.23.34.722 - 68
5.012.42.215 - 222.23.34.722 - 68
6.516.52.215 - 222.23.34.722 - 68