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Board Layout
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Board Layout
This section provides the TPS62230EVM-370 board layout and illustrations.
Board layout is critical for all high-frequency, switch-mode power supplies. Figure 1 , Figure 2 , and
Figure 3 show the board layout for the TPS62230EVM-370 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 TPS62230, 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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TPS62230EVM-370 User's Guide
SLVU312 – June 2009
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TPS622312DRYT 功能描述:直流/直流开关转换器 3MHz,500mA Step- Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
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