RT6908

5

DS6908-01

March 2013

www.richtek.com

Copyright

2013 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

©

Pin No.

Pin Name

Pin Function

28

DHB2

High Side Gate Driver Output for Buck2 Converter.

29

LXB2

Buck2 Converter Switch node Between High Side MOSFET and Low Side

MOSFET.

30

BOOT2

N-MOSFET Gate Drive Voltage for Buck2 Converter. Connect a capacitor

from the switch node LXB2 to this pin.

31

EN_I2C

Enable for I

2

C Control. AVDD, VGL, VGH enabled by I

2

C Control.

32

EN

Chip Enable (Active High). Tie to VL to enable the device.

33

VL

Internal Logic Regulator Output. Connect this pin with a decoupling

capacitor.

34

AGND

Analog Ground.

35

AVIN

Analog Input Voltage of the Device. This is the input for the analog circuits.

Connect this pin with a decoupling capacitor.

36

VINB1

38

BOOT1

N-MOSFET Gate Drive Voltage for Buck1. Connect a capacitor from the

switch node LXB1 to this pin.

39

LXB1

Buck1 Switch node Between High Side MOSFET and Low Side MOSFET.

40

LXB1

Buck1 Switch node Between High Side MOSFET and Low Side MOSFET.

Function Block Diagram

Internal

Regulator

Sync.

Buck1

AVIN

VL

BOOT1

VINB1

LXB1

FBB1

BOOST

LXI

GD

AVDD

COMP

LX

Sequence

Control

EN_I2C

DC/DC

DAC

REG

I

2

C

Interface

SDA

SCL

A0

VDET

VGL

Regulator

VL

DRVN

VGH

Regulator

DRVP

VGH

DHB2

PGND

AGND

Voltage

Detector

EN

RSTB

CRST

Sync.

Buck2

LXB2

DLB2

FBB2

COMP2

ILIMIT2

BOOT2

VL

VGL

COMP1