RT9742
®
DS9742-07 June 2017 www.richtek.com
1
©
Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Simplified Application Circuit
Applications
USB Peripherals
Notebook PCs
70m
ΩΩ
ΩΩ
Ω/55m
ΩΩ
ΩΩ
Ω, 3A/2.5A/2A/1.5A/1A/0.5A High-Side Power
Switches with Flag
General Description
The RT9742 is a cost-effective, low-voltage, single
N-MOSFET high-side Power Switch IC for USB application.
Low switch-on resistance and low supply current are
realized in this IC.
The RT9742 integrates an over-current protection circuit,
a short fold back circuit, a thermal shutdown circuit and
an under-voltage lockout circuit for overall protection.
Besides, a flag output is available to indicate fault
conditions to the local USB controller. Furthermore, the
chip also integrates an embedded delay function to prevent
miss-operation from happening due to inrush-current. The
RT9742 is an ideal solution for USB power supply and
can support flexible applications since it is available in
TSOT-23-5, TSOT-23-5 (FC) and SOT-23-3 package.
Pin Configuration
(TOP VIEW)
GND
VOUT
RT9742
C
OUT
V
BUS
D+
D-
GND
Data
+
Supply Voltage
2.7V to 6V
VIN
Over-Current
USB Controller
FLG
C
IN
Chip Enable
EN/EN
Features
70m
ΩΩ
ΩΩ
Ω/55m
ΩΩ
ΩΩ
Ω (typ.) N-MOSFET Switch
Operating Range : 2.7V to 6V
Reverse Blocking Current
Under Voltage Lockout
Deglitched Fault Report (FLG)
Thermal Protection with Fold-back
Over Current Protection
Short Circuit Protection
UL Approved
E219878
Nemko Approved-NO87949
VOUT GND
VIN
4
23
5
FLG
EN/EN
VOUT GND VIN
VOUT EN
4
23
5
EN GND
VOUT
4
23
5
FLG
VIN
VIN VOUT
GND
2
3
TSOT-23-5 /
TSOT-23-5 (FC)
TSOT-23-5
For RT9742M only
TSOT-23-5
For RT9742U only
SOT-23-3
RT9742
2
DS9742-07 June 2017www.richtek.com
©
Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Ordering and Marking Information
Version
Product
Code
Current
Discharge
Function
EN Function Package
Active
High
Active
Low
Internal
Pull High
TSOT-23-5
(FC)
TSOT-23-5 SOT-23-3
RT9742AGJ5F 07= 3A Yes V V
RT9742BGJ5F 06= 3A Yes V V
RT9742ANGJ5F 0F= 3A No V V
RT9742BNGJ5F 0E= 3A No V V
RT9742CGJ5F 05= 2A Yes V V
RT9742DGJ5F 04= 2A Yes V V
RT9742CNGJ5F 0D= 2A No V V
RT9742DNGJ5F 0C= 2A No V V
RT9742CGJ5 0K= 2A Yes V V
RT9742DGJ5 0J= 2A Yes V V
RT9742CNGJ5 11= 2A No V V
RT9742DNGJ5 10= 2A No V V
RT9742JNGV 6A= 2A No V V
RT9742EGJ5F 03= 1.5A Yes V V
RT9742FGJ5F 02= 1.5A Yes V V
RT9742ENGJ5F 0B= 1.5A No V V
RT9742FNGJ5F 0A= 1.5A No V V
RT9742EGJ5 0H= 1.5A Yes V V
RT9742FGJ5 0G= 1.5A Yes V V
RT9742ENGJ5 0Z= 1.5A No V V
RT9742FNGJ5 0Y= 1.5A No V V
RT9742KNGV 69= 1.5A No V V
RT9742GGJ5F 01= 1A Yes V V
RT9742HGJ5F 00= 1A Yes V V
RT9742GNGJ5F 09= 1A No V V
RT9742HNGJ5F 08= 1A No V V
RT9742GGJ5 0F= 1A Yes V V
RT9742HGJ5 0E= 1A Yes V V
RT9742GNGJ5 0X= 1A No V V
RT9742HNGJ5 0W= 1A No V V
RT9742LNGV 68= 1A No V V
RT9742MGJ5 14= 1.5A Yes V V
RT9742MNGJ5 15= 1.5A No V V
RT9742NGJ5F 43= 2.5A Yes V V
RT9742PGJ5F DD= 2.5A Yes V V
RT9742NNGJ5F 42= 2.5A No V V
RT9742PNGJ5F CC= 2.5A No V V
RT9742NGJ5 9H 2.5A Yes V V
RT9742QGJ5 47= 0.5A Yes V V
RT9742RGJ5 45= 0.5A Yes V V
RT9742QNGJ5 46= 0.5A No V V
RT9742RNGJ5 44= 0.5A No V V
RT9742SNGV 6V= 0.5A No V V
RT9742UNGJ5 9F= 1.5A No V V
RT9742
3
DS9742-07 June 2017 www.richtek.com
©
Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Functional Pin Description
Pin Name Pin Function
VOUT Output voltage.
GND Ground.
FLG
Fault FLAG output.
EN/EN
Chip enable (Active High/Low).
VIN Power input voltage.
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.
Functional Block Diagram
TSOT-23-5 / TSOT-23-5 (FC) Package
Gate
Control
Output Voltage
Detection
Delay
Oscillator
UVLO
Charge
Pump
Bias
Thermal
Protection
Current
Limiting
VOUT
VIN
GND
EN/EN
FLG
Auto Discharge
SOT-23-3 Package
Output Voltage
Detection
Gate
Control
VOUT
Charge
Pump
VIN
Bias
GND
Current
Limiting
Auto
Discharge
UVLO
Thermal
Protection
Oscillator

RT9742DGJ5

Mfr. #:
Manufacturer:
Description:
IC USB POWER SWITCH TSOT23-5
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union