RT9741

®

DS9741-01 March 2015

www.richtek.com

1

©

Copyright 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

100m

Ω

Ω

Ω

Ω

Ω, 1.5A/0.7A High-Side Power Switches

General Description

The RT9741 is a cost-effective, low-voltage, single N-

MOSFET high-side Power Switch IC for USB application.

Low switch-on resistance (typ. 100m

Ω) and low supply

current (typ. 50

μA) are realized in this IC.

The RT9741 integrates an over-current protection circuit,

a short fold back circuit, a thermal shutdown circuit and

an under-voltage lockout circuit for overall protection.

Furthermore, the chip also integrates an embedded delay

function to prevent miss-operation from happening due to

inrush-current. The RT9741 is an ideal solution for USB

power supply and can support flexible applications since

it is available in the SOT-23-3 package.

Ordering Information

Features











100m

Ω

Ω

Ω

Ω

Ω (typ.) N-MOSFET Switch











Operating Range : 2.7V to 5.5V











Reverse Blocking Current











Under-Voltage Lockout











Thermal Protection with Foldback











Over-Current Protection











Short-Circuit Protection







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RoHS Compliant and Halogen Free

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.

Marking Information

Simplified Application Circuit

VIN

GND

VOUT

RT9741

Supply Voltage

2.7V to 5.5V

D+

D-

GND

Data

FB

FB

Applications



USB Peripherals



Notebook PCs

4F=DNN

4F= : Product Code

DNN : Date Code

RT9741AGV

4D=DNN

4D= : Product Code

DNN : Date Code

RT9741CGV

RT9741

Package Type

V : SOT-23-3

Lead Plating System

G : Green (Halogen Free and Pb Free)

Output Current

A : 1.5A

C : 0.7A