Products > Integrated Circuits (ICs) > Power Management ICs > RT9742CGJ5

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Power Load Distribution Switch IC, Active High, 1 Output, 6 V in, 2.2 A, 0.07 ohm, TSOT-23-5

Manufacturer : Richtek Technology Corporation
Package/Case : SOT23-5L
Product Categories : Logic ICs
Datasheet: RT9742CGJ5 Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
In-stock: 5480


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RT9742CGJ5 Product Details

The RT9742CGJ5 is a cost effective, low voltage, single N-MOSFET high side power switch IC with flag output for USB application in 5 pin TSOT-23 package. It provides low switch on-resistance and low supply current. The RT9742 integrates an overcurrent protection circuit, short fold back circuit, thermal shutdown circuit and an undervoltage lockout circuit for overall protection. A flag output is available to indicate fault conditions to local USB controller. The chip also integrates an embedded delay function to prevent miss operation from happening due to inrush current. The device is an ideal solution for self powered and bus powered USB applications. It is equipped with a charge pump circuitry to drive the internal N-MOSFET switch. The RT9742 continuously monitors the output current for overcurrent protection to protect system power, power switch and load from damage during output short circuit. It has 140°C thermal shutdown protection and 20°C thermal shutdown hysteresis.



  • Operating voltage range from 2.7V to 6V and enable (EN) voltage range from 0V to 6V
  • Reverse blocking current and deglitched fault report (active-low FLG)
  • 10 ohm active-low FLG output resistance, 0.01µA FLG off current and 10ms FLG delay time
  • UL E219878 approved and Nemko NO87949 approved
  • Output current of 2A and current limit of 2.2A at VOUT = 1V
  • Discharge function and active-high enable function
  • Input quiescent current of 30µA and input shutdown current of 0.1µA
  • Switch on-resistance of 70mohm and over current trip threshold of 2.8A at VIN = 5V, 100A/s
  • Ambient temperature range from -40°C to 85°C


Power Management, Consumer Electronics, Portable Devices

RT9742CGJ5 Block Diagram
(Picture: Diagram)

Technical Parameters

  • Switch Type
  • USB Switch
  • Number of Outputs
  • 1
  • Ratio Input:Output
  • 1:1
  • Output Configuration
  • High Side
  • Output Type
  • N-Channel
  • Interface
  • On/Off
  • Voltage Load
  • 2.7V ~ 6V
  • Voltage Supply (Vcc/Vdd)
  • Not Required
  • Current Output (Max)
  • 2A
  • Rds On (Typ)
  • 70mOhm
  • Input Type
  • Non-Inverting
  • Features
  • Load Discharge, Status Flag
  • Fault Protection
  • Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
  • Operating Temperature
  • -40??C ~ 85??C (TA)
  • Package / Case
  • SOT-23-5 Thin, TSOT-23-5
  • Supplier Device Package
  • TSOT-23-5

RT9742CGJ5 Datasheet

RT9742CGJ5 Related Products

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Estimated Delivery Time: Dec 06 - Dec 11 days (choose Expedited at checkout).

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  • $2.00-$3.00 (0.10 KG)
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Processing Time:Shipping fee depend on different zone and country.


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  • Hand Fee
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We provide high quality products, thoughtful service and after sale guarantee

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    We have rich products, can meet your various needs.

  • Minimum order quantity starts from 1pcs.

    Minimum order quantity starts from 1pcs.

  • Lowest international shipping fee starts from US$2.00.

    Lowest international shipping fee starts from US$2.00.

  • 90 days quality guarantee for all products.

    90 days quality guarantee for all products.


  • Step1:Product

    Step1: Products

  • Step2:Vacuum packaging

    Step2: Vacuum Packaging

  • Step3:Anti-static bag

    Step3: Anti-Static Bag

  • Step4:Individual packaging

    Step4: Individual Packaging

  • Step5:Packaging boxes

    Step5: Packaging Boxes

  • Step6:bar-code shipping tag

    Step6: Bar-Code Shipping Tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

Jotrin ESD packing


1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


Q: How does Jotrin guarantee that RT9742CGJ5 is the original manufacturer or agent of RICHTEK?
We have a professional business development department to strictly test and verify the qualifications of RICHTEK original manufacturers and agents. All RICHTEK suppliers must pass the qualification review before they can publish their RT9742CGJ5 devices; we pay more attention to the channels and quality of RT9742CGJ5 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of RT9742CGJ5 chips? Including RICHTEK original factory information, Logic ICs application, RT9742CGJ5 pictures?
You can use Jotrin's intelligent search engine, or filter by Power Switch category, or find it through Richtek Technology Corporation Information page.
Q: Are the RICHTEK's RT9742CGJ5 price and stock displayed on the platform accurate?
The RICHTEK's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for RT9742CGJ5, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
Q: Can I place an order offline?
Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
Q: What forms of payment can I use in Jotrin?
TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
Q: How is the shipping arranged and track my package?
Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of RT9742CGJ5?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the RT9742CGJ5 we delivered, we will accept the replacement or return of the RT9742CGJ5 only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of RT9742CGJ5.
(3)The RT9742CGJ5 is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as RT9742CGJ5 datasheet pdf, RT9742C pin diagram?
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Richtek Technology Corporation

Richtek is an international analog IC design company specializing in providing customers with diverse and competitive products and complete power management solutions. Since its establishment, Richtek has focused on integrating technical capabilities, adhering to quality and positive customer ser...

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