Diodes AP3431 - Manual (Page 16)

Data Sheet
1.0MHz, 2.0A, Synchronous Step Down DC-DC Converter AP3431
Nov. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
16
Application Information (Continued)
-IN and GND pins.
3) The FB pin should be connected directly to the
feedback resistor divider.
4) Keep the switching node, SW, away from the
sensitive FB pin and the node should be kept small
area.