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  • BD9109FVM

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Synchronous Buck Converter Integrated FET

  • Package/Case :
  • MSOP8
  • Product Categories :
  • Switching Regulators (190) ; Switching Regulators (Integrated FET) (167)
  • RoHs Status:
  • Lead free/RoHS Compliant
  • In-stock:
  • 16000


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BD9109FVM Product Details

ROHM's high efficiency step-down switching regulator (BD91) is a power supply designed to produce a low voltage including 1 volts from 5 / 3.3 volts power supply line. Offers high efficiency with our original pulse skip control technology and synchronous rectifier. Employs a current mode control system to provide faster transient response to sudden change in load.


  • 1ch Switching Regulator
  • Offers fast transient response with current mode PWM control system
  • Offers highly efficiency for all load range with synchronous rectifier (Nch / Pch FET) and SLLM™ (Simple Light Load Mode)
  • Incorporates soft-start function.
  • Incorporates thermal protection and ULVO functions.
  • Incorporates short-current protection circuit with time delay function
  • Incorporates shutdown function. Icc=0μA (Typ.)

BD9109FVM 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
  • Synchronous
  • Vin1 (Min.)[V]
  • 4.5
  • Vin1 (Max.)[V]
  • 5.5
  • Vout1 (Min.)[V]
  • 3.3
  • Vout1 (Max.)[V]
  • 3.3
  • Iout1 (Max.)[A]
  • 0.8
  • SW frequency (Max.)[MHz]
  • 1
  • Light Load mode
  • Yes
  • EN
  • Yes
  • No
  • Operating Temperature (Min.)[°C]
  • -25
  • Operating Temperature (Max.)[°C]
  • 85

BD9109FVM Documents

BD9109FVM Related Products

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Shipping More
Estimated Delivery Time: May 31 - Jun 05 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.We provide 90 days warranty.

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 BD9109FVM 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 BD9109FVM devices; we pay more attention to the channels and quality of BD9109FVM products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of BD9109FVM chips? Including ROHM original factory information, Switching Regulators (190) ; Switching Regulators (Integrated FET) (167) application, BD9109FVM 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 BD9109FVM 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 BD9109FVM, 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 BD9109FVM?
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 BD9109FVM we delivered, we will accept the replacement or return of the BD9109FVM 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 BD9109FVM.
(3)The BD9109FVM 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 BD9109FVM datasheet pdf, BD9109FVM 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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