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)
R
R
(max),VLDOREF_V())
R
R
(REF_Vmin,DCDC_Vout
3
1
2
2
1
12 ´-++´=
)
R
R
(min),VLDOREF_V())
R
R
(REF_Vmax,DCDC_Vout
3
1
2
2
1
12 ´-++´=
Board Layout
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(2)
(3)
The most straight forward way is to choose a value for R6 according to the recommendations in the
converter data sheet.
4 Board Layout
This section provides the TPS65023B/TPS650231EVM-664 board layout and illustrations.
4.1 Layout
Board layout is critical for all switch mode power supplies. Figure 1 through Figure 5 show the board
layout for the TPS65023B/TPS650231EVM-664 PCB. The nodes with high switching frequencies and
currents are short and are isolated from the noise-sensitive feedback circuitry. Careful attention has been
given to the routing of high-frequency current loops. See the data sheet for specific layout guidelines.
Figure 1. Assembly Layer
6
TPS65023B/TPS650231EVM SLVU394–October 2010
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