SNVU658B March   2020  – May 2021 TPS54J060 , TPS54J061

 

  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 Frequency and Operation Mode Setting
      3. 1.3.3 Enable Pin Selection
      4. 1.3.4 Adjustable UVLO
  3. 2Test Setup and Results
    1. 2.1  Input/Output Connections
    2. 2.2  Start Up Procedure
    3. 2.3  Efficiency
    4. 2.4  Load and Line Regulation
    5. 2.5  Load Transients
    6. 2.6  Loop Characteristics
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Powering Up and Down with EN
    10. 2.10 Powering Up and Down With VIN
    11. 2.11 Start-Up Into Pre-Bias
    12. 2.12 Current Limit
  4. 3Schematic, List of Materials, and Layout
    1. 3.1 Schematic
    2. 3.2 List of Materials
    3. 3.3 Layout
  5.   Revision History

1.3.2 Frequency and Operation Mode Setting

To change the frequency and operation mode of the part, the MODE pin is used. J4 and the surrounding circuitry allows for an easy change to the frequency and operation mode setting. All 6 options offered by J4 are shown in Table 1-3.

Default setting: Short to VCC 1.1MHz, DCM.

Table 1-3 Switching Frequency and Mode
Switching Frequency (fsw)Operation Mode Under Light LoadMode Pin Connections
ConnectionJumper Setting
1100 kHzSkip ModeShort to VCCShort Pins 1 and 2
2000 kHzSkip Mode243 kΩ +/- 10% to AGNDShort Pins 3 and 4
600 kHzSkip Mode121 kΩ +/- 10% to AGNDShort Pins 5 and 6
600 kHzForced CCM60.4 kΩ +/- 10% to AGNDShort Pins 7 and 8
2000 kHzForced CCM30.1 kΩ +/- 10% to AGNDShort Pins 9 and 10
1100 kHzForced CCMShort to AGNDShort Pins 11 and 12