RT9746

®

DS9746-00 March 2016

www.richtek.com

1

©

Copyright 2016 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Applications

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Cellular Phone



Smart Handheld Device

VBUS OVP with a PTVS Diode

General Description

The RT9746 is an overvoltage protection devices feature a

low 35m

Ω (typ) RON internal FET with PTVS diode. The

When the input voltage exceeds the overvoltage threshold,

the internal FET is turned off to prevent damage to the

protected down stream components.

The internal Over Voltage Thresholds (OVP) are preset to

6.8V typical. The RT9746 also feature an over-current

protection and up to 4.5A.

The RT9746 is offered in a small WL-CSP-12B (BSC)

package provides small PCB area applications.

Marking Information

Features

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PTVS Diode Embedded for VBUS Surge Protection



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Warning Indicator for OVP or UVP

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28V Maximum Rating for DC Adapter

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Integrated Over-Voltage and Over Current

Protection FET on VBUS for Fault Isolation

Ordering Information

Note :

Richtek products are :



RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.



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

Pin Configurations

(TOP VIEW)

WL-CSP-12B 1.92x1.27 (BSC)

GND_

PTVS

VOUT

GND

VOUT

WRNB

GND_

PTVS

VOUT

VIN

VIN

OVPFB

VIN

GND_

PTVS

A3

A4

A1

A2

B3

B4

B1

B2

C3

C4

C1

C2

3CW

3C : Product Code

W : Date Code

RT9746WSC

Package Type

WSC : WL-CSP-12B 1.92x1.27

RT9746

OVP Threshold Option

Default : 6.8V

A : 11.5V

B : 14.5V

C : 6.2V

RT9746

VOUT

GND_PTVS

VIN

WRNB

OVPFB

R2

R1

Adaptor

Charger

Processor

VDDIO

GND

R3

Simplified Application Circuit