SLUU240B January   2006  – March 2022 TPS51120

 

  1.   Trademarks
  2. 1Description
  3. 2Electrical Performance
  4. 3Schematic
  5. 4Test Setup and Results
    1. 4.1 Test Setup
    2. 4.2 Test Procedure
    3. 4.3 Start-Up Performance
    4. 4.4 Transient Performance
  6. 5Configuration
    1. 5.1 Switching Frequency Selection
    2. 5.2 Skip Mode and Faults Disable Selection
    3. 5.3 Output Voltage Setting Selection
    4. 5.4 Control Scheme Selection
  7. 6EVM Assembly Drawing and PCB Layout
  8. 7List of Materials
  9. 8References
  10. 9Revision History

4.2 Test Procedure

  1. Make sure the switches SW1 (EN1), SW2 (EN2), SW3 (EN5), and SW4 (EN3) are in the “OFF” position.
  2. Make sure the shunt jumper for JP1 is set 5-pin to 6-pin (Med2), and shunt jumper for JP2 is set 1-pin to 2- pin (auto-skip).
  3. Apply appropriate VBAT voltage to VBAT1 and VBAT_GND1 terminals.
  4. Turn on SW3 (EN5) and VREG5 (5V-LDO) starts up.
  5. Turn on SW4 (EN3) and VREG3 (3.3V-LDO) starts up.
  6. When SW3 and SW4 stay on, VREF2 (2V-REF) enables.
  7. When SW3 and SW4 stay on and turn on SW1 (EN1), CH1-output will start up.
  8. When SW3 and SW4 stay on and turn on SW2 (EN2), CH2-output will start up.