SNVS723G October 2011 – July 2018 LMZ10500
The board layout of any DC/DC switching converter is critical for the optimal performance of the design. Bad PCB layout design can disrupt the operation of an otherwise good schematic design. Even if the regulator still converts the voltage properly, the board layout can mean the difference between passing or failing EMI regulations. In a Buck converter, the most critical board layout path is between the input capacitor ground terminal and the synchronous rectifier ground. The loop formed by the input capacitor and the power FETs is a path for the high di/dt switching current during each switching period. This loop should always be kept as short as possible when laying out a board for any Buck converter.
The LMZ10500 integrates the inductor and simplifies the DC/DC converter board layout. Refer to the example layout in Figure 38. There are a few basic requirements to achieve a good LMZ10500 layout.
Refer to the evaluation board user guide SNVU313 for a complete board layout example.