Products > Integrated Circuits (ICs) > RT9259A
  • RT9259A

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  • Package/Case :
  • SOP-14
  • Product Categories :
  • Switching Regulators ; Single-Phase Step-Down Controller
  • RoHs Status:
  • Lead free/RoHS Compliant
  • In-stock:
  • 196


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RT9259A Product Details

The RT9259A is a dual-channel DC/DC controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a synchronous buck controller and an LDO controller. The synchronous buck controller integrates MOSFET drivers that support 12V+12V bootstrapped voltage for high efficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count. The LDO controller drives an external N-MOSFET for lower power requirement.Other features include adjustable operation frequency, internal soft start, under voltage protection, over current protection and shut down function. With the above functions, this part provides customers a compact, high efficiency, well-protected and cost-effective solution. This part comes to VQFN-16L 4x4, SOP14 and SSOP-16 packages.


  • Single 12V Bias Supply
  • Support Dual Channel Power Conversion  ♦ One Synchronous Rectified Buck PWM Controller  ♦ One Linear Controller
  • Both Controllers Drive Low Cost N-MOSFETs
  • Adjustable Frequency from 150kHz to 1MHz and Free-Run Frequency at 230kHz
  • Small External Component Count
  • Output Voltage Regulation  ♦ PWM Controller : ±1% Accuracy  ♦ LDO Controller : ±2% Accuracy
  • Two Internal VREF Power Support Lower to 0.8V
  • Adjustable External Compensation
  • Linear Controller Drives N-MOSFET Pass Transistor
  • Fully-Adjustable Outputs
  • Under Voltage Protection for Both Outputs
  • Over Current Fault Monitor on MOSFET; No Current Sense Resistor is Required.
  • RoHS Compliant and 100% Lead (Pb)-Free


  • Graphic Card GPU, Memory Core Power
  • Graphic Card Interface Power
  • Motherboard, Desktop and Servers Chipset and Memory Core Power
  • IA Equipments
  • Telecomm Equipments
  • High Power DC-DC Regulators

RT9259A Block Diagram
(Picture: Diagram)

Technical Parameters

  • Status
  • Active
  • Vs (typ) (V)
  • 12
  • Vin (min) (V)
  • 3.3
  • Vin (max) (V)
  • 12
  • Vout (min) (V)
  • 0.8
  • Vout (max) (V)
  • 5
  • Output Adj. Method
  • Resistor
  • Accuracy (+/ %)
  • 1
  • Freq (typ) (kHz)
  • 300
  • Freq (min) (kHz)
  • 150
  • Freq (max) (kHz)
  • 1000
  • Iq (typ) (mA)
  • 3
  • Ext Sync
  • No
  • Features
  • Adjustable Frequency;Built-in Bootstrap Switch;Force PWM;OCP;SCP;UVP;Voltage Mode Control
  • Package Type
  • SOP-14

RT9259A Documents

RT9259A Related Products

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Shipping More
Estimated Delivery Time: May 28 - Jun 02 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 RT9259A 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 RT9259A devices; we pay more attention to the channels and quality of RT9259A products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of RT9259A chips? Including RICHTEK original factory information, Switching Regulators ; Single-Phase Step-Down Controller application, RT9259A pictures?
You can use Jotrin's intelligent search engine, or filter by Switching Regulators ; Single-Phase Step-Down Controller category, or find it through Richtek Technology Corporation Information page.
Q: Are the RICHTEK's RT9259A 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 RT9259A, 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 RT9259A?
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 RT9259A we delivered, we will accept the replacement or return of the RT9259A 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 RT9259A.
(3)The RT9259A 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 RT9259A datasheet pdf, RT9259 pin diagram?
Need any After-Sales service, please feel free contact us:

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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