EVM Assembly Drawings and Layout
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5.3
Switch Node and Output Ripple Voltage
V
IN
= 13.2V, V
OUT1
= 3.3A, I
OUT2
= 1.2V I
OUT2
= 2.5A
Ch1: TP3 (VOUT1), Ch2: TP18 (VOUT2) Ch3: TP9 (SW1), Ch4: TP12 (SW2)
Figure 7. TPS54291EVM-431 Output Voltage Ripple
6
EVM Assembly Drawings and Layout
through
show the designs of the TPS54291EVM-431 printed circuit board. The EVM
has been designed using a 4-Layer, 2oz copper-clad circuit board 3.0” × 3.0” with all components in a
0.86" × 1.28" active area on the top side and all active traces to the top and bottom layers to allow the
user to easily view, probe and evaluate the TPS54291 control IC in a practical double-sided application.
Moving components to both sides of the PCB or using additional internal layers can offer additional size
reduction for space constrained systems
Figure 8. TPS54291EVM-431 Component Placement (Viewed from Top)
12
Using the TPS54291EVM-431 A 12V Input, 3.3V 1.5A and 1.2V 2.5A
SLVU356 – January 2010
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