RT9712

®

DS9712-04 November 2012

www.richtek.com

1

©

Copyright 2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

90m

Ω

Ω

Ω

Ω

Ω, 1A/1.5A High-Side Dual Power Switches with Flag

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

SOP-8/MSOP-8

(TOP VIEW)

RT9712A/C

RT9712B/D

Features

90m

Ω

Ω

Ω

Ω

Ω N-MOSFET Switch

Operating Voltage Range : 2.7V to 5.5V

Reverse Blocking Current

Under Voltage Lockout

Deglitched Fault Report (FLGx)

Thermal Protection with Foldback

Over Current Protection

Short Circuit Protection

UL Approved

Nemko Approved-NO49352

RoHS Compliant and Halogen Free

GND

VIN

VOUT2

VOUT1

EN1

EN2

2

3

4

5

8

7

6

FLG2

FLG1

GND

VIN

VOUT2

VOUT1

EN1

EN2

2

3

4

5

8

7

6

FLG2

FLG1

Applications

USB Peripherals

Notebook PCs

RT9712

Package Type

S : SOP-8

F : MSOP-8

Lead Plating System

G : Green (Halogen Free and Pb Free)

Output Current/ENx Function

A : 1.5A/Active High

B : 1.5A/Active Low

C : 1A/Active High

D : 1A/Active Low

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

General Description

The RT9712 power-distribution switches are designed to

fulfill the applications in heavy capacitive loads and short-

circuit situations. The device incorporates two 90m

Ω N-

MOSFET power switches to fit power distribution systems

requiring multiple power switches in a single package.

During switching process, an internal charge pump is

designed to provide the gate drive for the purpose of power-

switch rise times and fall times controlling to minimize

the current surges. The charge pump can operate in supply

voltage as low as 2.7V and needs no external

components.

If the output load exceeds the current-limit threshold or a

short-circuit occurs.The RT9712 series pull the overcurrent

(FLGx) logic output low by switching into the constant-

current mode to maintain the output current in a safe level,

A thermal protection circuit turns off the switch to prevent

the device from damage when power dissipation is

increased by continuous heavy overloads and short-circuits

in the switch and finally cause the rise of the junction

temperature. The device automatically recovers when it

has sufficiently cooled down. The RT9712A/B are designed

for the current limit at typically 2A and RT9712C/D are

designed for the current limit at typically 1.5A. Internal

circuitry controls the switch to remain off until valid input

voltage is presented.