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

1.3.3 Adjustable UVLO

The undervoltage lockout (UVLO) can be adjusted externally using R3 and R4 or R5 and R6 for VOUT1 or VOUT2. Use Equation 5 and Equation 6 to calculate required resistor values for different start voltages.

Equation 5. GUID-10F83C99-7DF9-47F0-BA05-0F87BD362953-low.gif
or
Equation 6. GUID-50FAFBFC-3A3A-4202-A617-F4F41158AA64-low.gif

Use Equation 7 or Equation 8 to calculate required resistor values for different stop voltages.

Equation 7. GUID-E0D2CD60-0E8B-4A87-88A5-37F2B241E531-low.gif
or
Equation 8. GUID-E0EB5A22-8DF5-4BD4-9061-C98C2772297C-low.gif