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VPP
ILoading
VDDQ
ILoading
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Test Setup and Results
5 SLUUC02 – February 2019
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TPS65295EVM-079, 4.5-V to 18-V
IN
, complete DDR4 power solution
evaluation module
3.3 Start-Up Procedure
1. Jump the J10 and J11 accordingly or connect external drive signals to the TP23 and TP24.
2. Jump J1 and J6 accordingly
3. Connect loadings to the output connectors.
4. Apply proper DC voltage to J2 and J4. If PVIN_VPP and VCC_5V share same power supply, apply the
power at J4 first, and then apply J2. If PVIN_VPP and VCC_5V don’t share same power supply, apply
the power at J4 and J2 first, and then apply the J2-2 for VCC_5V.
5. Check the outputs.
3.4 Load Transient Response
The TPS65295EVM-079 VDDQ and VPP response to load transient is shown in Figure 1 and Figure 3 .
The current steps and slew rates are indicated in the figures. Total peak-to-peak voltage variation is as
shown.
Figure 2. TPS65295EVM-079 VDDQ transient response with 1.6-8A loading, 2.5A/us
Figure 3. TPS65295EVM-079 VPP transient response with 0.01-1A loading, 2.5A/us