SLVU641A January   2012  – November 2021 TPS54120

 

  1.   Trademarks
  2. 1Background
  3. 2Setup
    1. 2.1 Input and Output Connections and Jumper Descriptions
    2. 2.2 Modifications
      1. 2.2.1 SW Output Voltage Setpoint
      2. 2.2.2 LDO Output Voltage Setpoint
      3. 2.2.3 Switcher Slow-Start Time
      4. 2.2.4 LDO Start-Up
    3. 2.3 Equipment Interconnect
  4. 3Operation
  5. 4Test Results
    1. 4.1 Output Voltage Ripple
    2. 4.2 Output Noise
    3. 4.3 Output Turn-On
    4. 4.4 Load Transient
    5. 4.5 Efficiency
    6. 4.6 Thermal Characteristic
  6. 5Board Layout
    1. 5.1 Layout Description
  7. 6Schematic
  8. 7Bill of Materials
  9. 8Revision History

4.6 Thermal Characteristic

This section shows a thermal image of the TPS54120 running at a 12-V input and 1-A load, 3.3-V LDO OUT, and 4.1-V switcher out. There is no air flow and the ambient temperature is 25°C. The peak temperature of the IC (56.4°C) is well below the maximum recommended operating condition listed in the data sheet of 150°C.

GUID-FF7DAA6C-CDFF-4AE0-A6FC-859AB414065A-low.gifFigure 4-8 TPS54120 Thermal Image