SLVUC22 July   2021 TPS62912 , TPS62913

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Performance Specification
    2. 1.2 EVM Features and Modifications
      1. 1.2.1 Input and Output Capacitors
      2. 1.2.2 Enable Level Shifter and Adjustable Threshold Voltage
      3.      Power Good Level Shifter
      4. 1.2.3 NR/SS Capacitor
      5. 1.2.4 Feedforward Capacitor
      6. 1.2.5 S-CONF Resistor
      7. 1.2.6 Loop Response Measurement
      8. 1.2.7 Single LC Filter Operation
  3. 2Setup
    1. 2.1 Input/Output Connector Descriptions
    2. 2.2 Ripple Measurement
  4. 3Test Results
  5. 4Board Layout
  6. 5Schematic and Bill of Materials
    1. 5.1 Schematic
  7. 6Bill of Materials

3 Test Results

The TPS62913-IBB-EVM is set to -5 V output, but can be easily modified through the feedback resistors for other output voltages. The efficiency curves below show the performance at 3.3 V, 5 V, and 11.5 V input voltages.

Figure 3-1 Efficiency for -5 V Output with 1MHz fSW
GUID-20210513-CA0I-PXTX-KRZD-ZWX3GQWHZCPD-low.pngFigure 3-2 Startup with No Load
GUID-20210513-CA0I-S7QG-FW5Z-GQTGVGDFJTQH-low.pngFigure 3-3 Startup with 1A Load
GUID-20210513-CA0I-WWW8-P7KM-2FWZTW77QX0D-low.pngFigure 3-4 Shutdown with No Load
GUID-20210513-CA0I-WZ2L-25WF-T6CXBQD9NP6B-low.pngFigure 3-5 Shutdown with 1A Load

Figure 3-6 shows the loop response measurement.

GUID-20210519-CA0I-SKD8-TGZW-TGFB0V1GGKZQ-low.pngFigure 3-6 Loop Response Measurement (VIN = 5 V, VOUT = -5 V, IOUT = 1000 mA, Ferrite Bead Removed)