SLVU179B October   2006  – February 2022 TPS51117

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Description
    2. 1.2 Features
    3. 1.3 Operating Specification
    4. 1.4 Schematic
  3. 2Test Setup
    1. 2.1 Test Equipment
    2. 2.2 Test Points
    3. 2.3 Recommended Test Setup
    4. 2.4 Standard Test Procedures
      1. 2.4.1 Line/Load Regulation
      2. 2.4.2 Output Ripple Measurement
  4. 3Performance Data and Typical Characteristic Curves
  5. 4Board Layout Using TPS51117RGY (QFN 14)
  6. 5List of Materials
  7. 6Revision History

2.4.1 Line/Load Regulation

  1. Ensure the load is set to constant current mode and set to 0 ADC.
  2. Make sure the switch SW 1 is in the “OFF” position.
  3. Turn on VBAT supply, increase to 12 V, and use DMM1 to measure the voltage.
  4. Turn on 5.0-V bias supply, increase to 5 V, and use DMM2 to measure the voltage.
  5. Turn on SW1 to skip mode (On) and verify output voltage on DMM3.
  6. Vary the load from 0 ADC to 10 ADC. VOUT should remain in load regulation.
  7. Move the SW1 to PWM mode (float) and repeat step 6.
  8. With load still at 10 ADC, vary the VBAT supply from 6 V to 21 V. VOUT should remain in line regulation.
  9. Turn SW1 to the OFF position. Verify VOUT is 0 V.
  10. Decrease the load to 0 A.
  11. Decrease bias supply and VBAT supply to 0 V.