AS3709 datasheet(65/74 Pages) AMSCO

65 / 74 page

ams Datasheet, Confidential: 2013-Aug [1-02]

AS3709 – 65

Ap pl ication I n f o rmation

PCB with minimum 4 layers is recommended.

Figure 89:

Layout Guidelines 2/2

Layout Guidelines 2/2: Layout Guidelines 2/2: This figure shows the recommended layout and placement of the external components for the 1 x 2A & 1 x 3A application

circuit. Red lines and areas are connections on TOP layer. Grey lines and areas are GND and PVSS connections on TOP layer. Light blue lines and areas are connections on

an inner layer or BOTTOM layer. Black round dots are vias. VSUP areas should be connected to an inner VSUP plane via vias. GND and PVSS areas should be connected to

an inner GND plane via vias. A PCB with minimum 4 layers is recommended.

AS3709

QFN 32-pin 4x4mm

Exposed Pad: GND

LX_SD5

LX_SD4

VSUP_SD3

LX_SD3

VSUP_SD2

FB_SD1

PVSS_SD1

LX_SD1

FB_SD3

PVSS_SD4

SD3 & SD4 & SD5

SD1 & SD1

VSUP

SD4+SD5

CIN_SD1

COUT_SD1/2

CIN_SD2

COUT_SD3/4/5

CIN_SD5

CIN_SD4

CIN_SD3

VSUP_SD1

LX_SD1

FB_SD1

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