GL3522-22 Datasheet

© 2014 Genesys Logic, Inc. - All rights reserved.

Page 14

GLI Confidential

Note: Analog circuits are quite sensitive to power and ground noise. PCB layout must take care the power

routing and the ground plane. For detailed information, please refer to

USB 3.0 Hub Design Guide.

Notation:

Type

O

Output

I

Input

B

Bi-directional

P

Power / Ground

A

Analog

pu

Internal pull up

pd

Internal pull down

GL3522-22 Unspecified

Pin Name

QFN 76 / LGA 76

Type

Description

FB

2

A

Switcher Feedback Voltage. This pin is the inverting input of the error

amplifier. VOUT senses the switcher output through an external

resistor divider network. For the fixed voltage version, connect this

pin to the output voltage.

LX

1

A

Internal Switches Output. Connect this pin to the output inductor.