RT9232PS datasheet(13/14 Pages) RICHTEK

13 / 14 page

RT9232

DS9232-06 March 2007

www.richtek.com

of high-side MOSFET. The MOSFETs of linear regulator

should have wide pad to dissipate the heat. In multilayer

PCB, use one layer as power ground and have a separate

control signal ground as the reference of the all signal. To

avoid the signal ground is effect by noise and have best

load regulation, it should be connected to the ground

terminal of output. Furthermore, follows below guidelines

can get better performance of IC:

(1). The IC needs a bypassing ceramic capacitor as a R-C

filter to isolate the pulse current from power stage

and supply to IC, so the ceramic capacitor should be

placed adjacent to the IC.

(2). Place the high frequency ceramic decoupling close

to the power MOSFETs.

(3). The feedback part should be placed as close to IC as

possible and keep away from the inductor and all noise

sources.

(4). The components of bootstraps should be closed to

each other and close to MOSFETs.

(5).The PCB trace from Ug and Lg of controller to

MOSFETs should be as short as possible and can

carry 1A peak current.

(6). Place all of the components as close to IC as possible.

RT9232PS 데이터시트(PDF) 13 Page - Richtek Technology Corporation