SY8113 is an efficient synchronous voltage dropDC-DC converter launched by SILERGY. The chip adopts It adopts PWM technology and integrates main switch and synchronous switch to reduce energy consumption. Its input voltage can be selected from 4.5V to 18V. 
By adopting appropriate PCB wiring rules, the performance of SY8113 will be better and the impact of noise can be minimized. The general principle of wiring is to place Cin, L, R1, and R2 as close as possible to the IC chip. The specific methods are as follows:
(1) Maximize the PCB copper area connected to the GND pin as much as possible to obtain better thermal performance and noise immunity;
(2) Cin should be placed as close as possible to the IN and GND pins, and the area surrounded by Cin and GND should be minimized as much as possible;
(3) The PCB copper area connected to the LX pin should be as small as possible to avoid noise problems;
(4) Resistors R1 and R2 and the copper trace connected to the FB pin cannot be adjacent to LX;