Texas Instruments TPS56121, User Manual, Page: 2 / 28

Figure 9-5. Switch Node Waveform Measured at Pins Using Tip and Barrel Measurement Technique (VIN = 12 V, VOUT
= 1.0 V, IOUT = 15 A)............................................................................................................................................................. 15
Figure 9-6. Load Transient (VIN = 12 V, VOUT = 1.0 V, IOUT = 0 A to 15 A)........................................................................... 15
Figure 9-7. Start-Up Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 15 A)............................................................................... 16
Figure 9-8. Pre-Biased Start-Up Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 0 A).............................................................. 16
Figure 9-9. Power-Off Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 15 A)............................................................................ 17
Figure 9-10. Over-Current Protection Waveform (Ch1: VIN, Ch2: EN/SS, Ch3: VOUT, Ch4: IOUT (10 A/div), VIN = 12 V,
VOUT = 1.0 V, IOUT = 23 A).................................................................................................................................................. 17
Figure 9-11. Loop Gain (VIN = 12 V, VOUT = 1.0 V, IOUT = 15 A, Bandwidth: 39 kHz, Phase Margin: 46°)............................ 18
Figure 9-12. Thermal Image (VIN = 14 V, VOUT = 1.0 V, IOUT = 15 A, without airflow)........................................................... 18
Figure 10-1. TPS56121EVM-601 Top Assembly Drawing (top view)........................................................................................ 19
Figure 10-2. TPS56121EVM-601 Bottom Assembly Drawing (bottom view)............................................................................. 19
Figure 10-3. TPS56121EVM-601 Top Copper (top view).......................................................................................................... 20
Figure 10-4. TPS56121EVM-601 Internal 1 (top view).............................................................................................................. 20
Figure 10-5. TPS56121EVM-601 Internal 2 (top view).............................................................................................................. 21
Figure 10-6. TPS56121EVM-601 Bottom Copper (top view)..................................................................................................... 21
List of Tables
Table 3-1. TPS56121EVM-601 Electrical Performance Specifications........................................................................................ 5
Table 7-1. Test Point Descriptions............................................................................................................................................. 10
Table 11-1. TPS56121EVM-601 List of Materials...................................................................................................................... 22
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2 TPS56121 Step-Down Converter Evaluation Module User's Guide SLVU445C – MARCH 2011 – REVISED AUGUST 2021
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