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  • BD9327EFJ

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Simple Step-down Switching Regulators with Built-in Power MOSFET

Manufacturer : ROHM Semiconductor
Package/Case : TSOP8
Product Categories : Switching Regulators (190) ; Switching Regulators (Integrated FET) (167)
Datasheet: BD9327EFJ Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
In-stock: 12727


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BD9327EFJ Product Details

The BD9327EFJ is step-down regulators that integrate a low resistance high side N-channel achieves 4A continuous output current over a wide input supply range. Current mode operation provides fast transient response and easy phase compensation.


  • Wide operating INPUT Range 4.75V to 18V
  • Selectable4A Output Current
  • Selectable 0.1Ω / 0.15Ω Internal MOSFET Switch
  • Low ESR Output Ceramic Capacitors are Available
  • Low Standby Current during Shutdown Mode
  • 380kHz Operating Frequency
  • Feedback voltage 0.9V ±1.5% Accuracy
  • Protection circuit : Undervoltage lockout protection circuit
  • Thermal shutdown circuit
  • Overcurrent protection circuit

BD9327EFJ Block Diagram
(Picture: Diagram)

Technical Parameters

  • Grade
  • Standard
  • Common Standard
  • -
  • DC/DC Designer
  • D_Button
  • ch
  • 1
  • Integrated FET / Controller
  • Integrated FET
  • Buck / Boost / Buck Boost / Inverting
  • Buck
  • Synchronous / Nonsynchronous
  • Non-synchronous
  • Vin1 (Min.)[V]
  • 4.75
  • Vin1 (Max.)[V]
  • 18
  • Vout1 (Min.)[V]
  • 0.9
  • Vout1 (Max.)[V]
  • 14.4
  • Iout1 (Max.)[A]
  • 4
  • SW frequency (Max.)[MHz]
  • 0.38
  • Light Load mode
  • No
  • EN
  • Yes
  • No
  • Operating Temperature (Min.)[°C]
  • -40
  • Operating Temperature (Max.)[°C]
  • 85

BD9327EFJ Datasheet

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Estimated Delivery Time: Jun 16 - Jun 21 days (choose Expedited at checkout).

Shipping & Payment


  • Shipping Type
  • Ship Fee
  • Lead Time
  • $20.00-$40.00 (0.50 KG)
  • 2-5 days
  • $20.00-$40.00 (0.50 KG)
  • 3-7 days
  • $20.00-$45.00 (0.50 KG)
  • 2-5 days
  • $25.00-$65.00 (0.50 KG)
  • 2-5 days
  • $25.00-$45.00 (0.50 KG)
  • 5-14 days
  • $2.00-$3.00 (0.10 KG)
  • 7-30 days

Processing Time:Shipping fee depend on different zone and country.


  • Terms of payment
  • Hand Fee
  • Payment Site
  • charge US$30.00 banking fee.
  • charge 4.0% service fee.
  • charge 3.5% service fee.
  • charge US$0.00 banking fee.
  • charge US$0.00 banking fee.

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

  • We have rich products, can meet your various needs.

    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 BD9327EFJ is the original manufacturer or agent of ROHM?
We have a professional business development department to strictly test and verify the qualifications of ROHM original manufacturers and agents. All ROHM suppliers must pass the qualification review before they can publish their BD9327EFJ devices; we pay more attention to the channels and quality of BD9327EFJ products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of BD9327EFJ chips? Including ROHM original factory information, Switching Regulators (190) ; Switching Regulators (Integrated FET) (167) application, BD9327EFJ pictures?
You can use Jotrin's intelligent search engine, or filter by Switching Regulators (190) ; Switching Regulators (Integrated FET) (167) category, or find it through ROHM Semiconductor Information page.
Q: Are the ROHM's BD9327EFJ price and stock displayed on the platform accurate?
The ROHM's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for BD9327EFJ, 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 BD9327EFJ?
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 BD9327EFJ we delivered, we will accept the replacement or return of the BD9327EFJ 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 BD9327EFJ.
(3)The BD9327EFJ 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 BD9327EFJ datasheet pdf, BD9327EFJ pin diagram?
Need any After-Sales service, please feel free contact us:

ROHM Semiconductor

ROHM was founded in Kyoto, Japan in 1958. ROHM designs and manufactures semiconductors, integrated circuits and other electronic components. These components have a place in the rapidly changing and growing wireless, computer, automotive and consumer electronics markets. Some of the most innovati...
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