SLVUA33A March   2014  – July 2021 TPS563900

 

  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 Slow-Start Time
      3. 1.3.3 Adjustable UVLO
  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 Powering Up
    9. 2.9 Shutting Down
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
    3. 4.3 Reference
  6. 5Revision History

1.3.2 Slow-Start Time

The slow-start time can be adjusted by changing the value of C7 or C8 for VOUT1 or VOUT2. Use Equation 3 or Equation 4 to calculate the required value of C7 or C8 for desired slow-start times.

Equation 3. GUID-778CA962-1DEC-42A0-BD50-A2DCCE908C7D-low.gif
or
Equation 4. GUID-3996D6FB-4888-47D0-A40B-3055E5C6C2DB-low.gif

The EVM is set for a slow-start time of 1 ms using C7 = C8 = 10 nF.