RT9285C

Preliminary

10

DS9285C-00

August 2007

www.richtek.com

} The output capacitor C2 should be connected directly from the Pin 5 to ground rather than across the LEDs. (*3)

} FB node copper area should be minimized and keep far away from noise sources (Pin 1, Pin 5, Pin 6). (*4)

} The Inductor is far away receiver and microphone.

} The voice trace is far away RT9285C.

} The embedded antenna is far away and different side RT9285C.

} R1 should be placed as close as RT9285C.

} The through hole of RT9285C's GND pin is recommended as large and many as possible.

Figure 8. Bottom

Figure 7. TOP

LX

GND

FB

EN

VOUT

VDD

4

2

3

5

6

1

EN

C1

L1

WLEDs

GND

C2

VIN

*1

*2

*3

*4