Products > Integrated Circuits (ICs) > Power Management ICs > IR3447MTRPBF

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Conv DC-DC 5V to 21V Synchronous Step Down Single-Out 0.6V to 18.06V 25A T/R

  • Package/Case :
  • PQFN(5x6mm)
  • Product Categories :
  • DC-DC Converters
  • RoHs Status:
  • Lead free / RoHS Compliant
  • Marking Code:
  • 3447
  • In-stock:
  • 1814


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IR3447MTRPBF Product Details


  • Single 5V to 21V application
  • Wide Input Voltage Range from 1.5V to 21V with external Vcc
  • Output Voltage Range: 0.6V to 0.86*PVin
  • 0.5% accurate Reference Voltage
  • Enhanced line/load regulation with Feed-Forward
  • Programmable Switching Frequency up to 1.5MHz
  • Internal Digital Soft-Start
  • Enable input with Voltage Monitoring Capability
  • Remote Sense Amplifier with True Differential Voltage Sensing
  • Thermally compensated current limit and Hiccup Mode Over Current Protection
  • Smart LDO to load efficiency
  • External synchronization with Smooth Clocking
  • Dedicated output voltage sensing for power good indication and overvoltage protection which remains active even when Enable is low.
  • Enhanced Pre-Bias Start up
  • Body Braking to improve transient
  • Integrated MOSFET drivers and Bootstrap diode
  • Thermal Shut Down
  • Post Package trimmed rising edge dead-time
  • Programmable Power Good Output
  • Small Size 5mm x 6mm PQFN
  • Operating Junction Temp: -40°C where Tj is < 125°C
  • Lead-free, Halogen-free and RoHS Compliant


  • Desktop and Workstations
  • Graphic Boards
  • Netcom and Telecom
  • Point of Load
  • Servers and Storage

IR3447MTRPBF Block Diagram
(Picture: Diagram)

Technical Parameters

  • Function
  • Step-Down
  • Output Configuration
  • Positive
  • Topology
  • Buck
  • Output Type
  • Adjustable
  • Number of Outputs
  • 1
  • Voltage Input (Min)
  • 5V
  • Voltage Input (Max)
  • 21V
  • Voltage Output (Min/Fixed)
  • 0.6V
  • Voltage Output (Max)
  • 18.06V
  • Current Output
  • 25A
  • Frequency Switching
  • 300kHz ~ 1.5MHz
  • Synchronous Rectifier
  • Yes
  • Operating Temperature
  • -40??C ~ 125??C (TJ)
  • Mounting Type
  • Surface Mount
  • Package / Case
  • 33-PowerVQFN
  • Supplier Device Package
  • PQFN (5x6)

IR3447MTRPBF Documents

IR3447MTRPBF Related Products

Ratings and Reviews (1)

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    Perfect thankyou A+++

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Estimated Delivery Time: Oct 21 - Oct 26 days (choose Expedited at checkout).

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  • Hand Fee
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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

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    Step3: Anti-Static Bag

  • Step4:Individual packaging

    Step4: Individual Packaging

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    Step5: Packaging Boxes

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    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 IR3447MTRPBF is the original manufacturer or agent of INFINEON?
We have a professional business development department to strictly test and verify the qualifications of INFINEON original manufacturers and agents. All INFINEON suppliers must pass the qualification review before they can publish their IR3447MTRPBF devices; we pay more attention to the channels and quality of IR3447MTRPBF products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of IR3447MTRPBF chips? Including INFINEON original factory information, DC-DC Converters application, IR3447MTRPBF pictures?
You can use Jotrin's intelligent search engine, or filter by Power ; DC-DC Converters ; Integrated POL Voltage Regulators category, or find it through Infineon Technologies Corporation Information page.
Q: Are the INFINEON's IR3447MTRPBF price and stock displayed on the platform accurate?
The INFINEON's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for IR3447MTRPBF, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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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.
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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 IR3447MTRPBF?
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 IR3447MTRPBF we delivered, we will accept the replacement or return of the IR3447MTRPBF 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 IR3447MTRPBF.
(3)The IR3447MTRPBF 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 IR3447MTRPBF datasheet pdf, IR3447M pin diagram?
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Infineon Technologies Corporation

Infineon is a leading global designer, manufacturer and supplier of a broad range of semiconductors used in various microelectronic applications. Infineon's product portfolio consists of logic products, including digital, mixed-signal, and analog integrated circuits, as well as discrete semiconducto...
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