Board Layout
Board layout is critical for all high-frequency, switch-mode power supplies.
, and
show the board layout for the TPS62233EVM-574 printed-circuit board. The nodes with high-
switching frequencies and currents are kept as short as possible to minimize trace inductance. High-
impedance inputs to the TPS62233, such as the Vout pin, have traces that are shielded by ground traces
and planes. Careful attention has been given to the routing of high-frequency current loops, and a single-
point grounding scheme is used. See the data sheet for specific layout guidelines. Input and output
capacitors must be kept as close as possible to the device. A large bulk input capacitor (C13, C23, and
C33) is provided to compensate for impedance in long input leads.
Figure 1. Assembly Layer
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TPS62233EVM-574 User's Guide
SLVU360B – April 2010 – Revised July 2013
Copyright © 2010–2013, Texas Instruments Incorporated
