SNVS872D August 2012 – August 2018 LMZ21700
The feedback node is a sensitive circuit which can pick up noise. Make the feedback node as small as possible. This can be achieved by placing the feedback divider as close as possible to the IC. Use thin traces to the feedback pin in order to minimize the parasitic capacitance to other nodes. The feedback network carries very small current and thick traces are not necessary. Another sensitive node to protect is the VOS pin. Use a thin and short trace from the VOUT terminal of the output capacitor to the VOS pin. The VOS pin is right next to the GND terminal. For very noisy systems, a small (0402 or 0201) 0.1-µF capacitor can be placed from VOS to GND to filter high frequency noise on the VOS line.