RT3678BE datasheet(2/93 Pages) RICHTEK

2 / 93 page

RT3678BE

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS3678BE-00

March 2023

Ordering Information

Package Type

QW: WQFN-68L 8x8 (W-Type)

RT3678BE

Lead Plating System

G: Green (Halogen Free and Pb Free)

The configuration code identifier

for the register setting stored in

the internal NVM

Note:

Richtek products are:



RoHS compliant and compatible with the current

requirements of IPC/JEDEC J-STD-020.



Suitable for use in SnPb or Pb-free soldering processes.

Marking Information

RT3678BE

GQW

YMDNN

RT3678BEGQW: Product Code

YMDNN: Date Code

Pin Configuration

(TOP VIEW)

GND

VDDIO

SVC

SVD

SVTI

ADDR

PSYS

SVTO

VCC

DRVEN

PWMA1

PWMA2

PWMA3

PWMA4

PWMA5

PWMA7

PWMA6

RGNDA

IMONA

VREF

IMONB

PWRGDA

RESET_L

SDA

ISENA8P

ISENA8N

FBA

VSENA

SCL

OCP_L

PWRENA

PWRENB

COMPA

VR_HOT#

WQFN-68L 8x8

Functional Pin Description

Pin No.

Pin Name

Pin Function

ADDR

A resistor tied to ground sets I2C address. For soldering check, connect the ADDR

pin to 5V and pull the PWREN high. If the soldering is good, output voltage is 0.9V

for rail A, 1V for rail B.

PSYS

System input power monitor. Place the PSYS resistor as close to the IC as

possible.

VDDIO

Supply voltage input of SVI3 interface. This pin serves as the reference for SVC,

SVD, SVTI and SVTO.

SVTO

Serial VID Telemetry output. This pin is a push-pull output.

SVC

Serial VID Clock input. This pin is a push-pull signal which acts as a clock for SVD,

SVTI and SVTO.

SVD

Serial VID Data input. This pin is a push-pull signal which transmits commands

from the controller to the targets.

SVTI

Serial VID Telemetry input. This pin is driven by the next-furthest target on the

telemetry daisy-chain.

8, 52,

53, 63

No internal connection.

VCC

Controller power supply. Connect this pin to 5V and place an RC filter, R = 1Ω and

C = 2.2µF. The decoupling capacitor should be placed as close to PWM controller

as possible. The recommended size of RVCC is 0603.

DRVEN

External driver mode control. As PSI6 command is received, this pin is in low state.

The output high level is VCC.

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