Products > Integrated Circuits (ICs) > RT8248AGQW
  • RT8248AGQW

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Complete DDR Memory Power Supply Controller

  • Package/Case :
  • QFN20
  • Product Categories :
  • Switching Regulators ; Single-Phase Step-Down Controller
  • RoHs Status:
  • Lead free/RoHS Compliant
  • In-stock:
  • 1091


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RT8248AGQW Product Details

The RT8248AGQW provides a complete power supply for DDR2/ DDR3/DDR3L/LPDDR3/DDR4 memory systems. It integrates a synchronous PWM Buck controller with a 1.5A sink/source tracking linear regulator and buffered low noise reference.

The PWM controller provides the low quiescent current, high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage chipset RAM supplies in notebook computers. The constant on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency.

The RT8248AGQW achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs. The Buck conversion allows this device to directly step down high- voltage batteries for the highest possible efficiency.

The 1.5A sink/source LDO maintains fast transient response only requiring a 10μF ceramic output capacitor. In addition, the LDO supply input is available externally to significantly reduce the total power losses. The IC supports all of the sleep state controls placing VTT at high -Z in S3 and discharging VDDQ, VTT and VTTREF (soft-off) in  S4/S5.

The RT8248AGQW provides protections including OVP, UVP, and thermal shutdown and available in the WQFN-20L 3x3  package.


PWM Controller

  • Adjustable Current Limit with Low-Side RDS(ON) Sensing 
  • Low Quiescent Supply Current 
  • Quick Load-Step Response within 100ns 
  • 1% VVDDQ Accuracy Over Line and Load 
  • Adjustable 0.675V to 3.3V Output Range for 1.8V (DDR2) , 1.5V (DDR3), 1.35V (DDR3L), 1.2V (LPDDR3) and 1.2V (DDR4) 
  • 4.5V to 26V Battery Input Range 
  • Resistor Adjustable Frequency 
  • Over-/Under-Voltage Protection 
  • Internal Voltage Ramp Soft- Start 
  • Drives Large Synchronous Rectifier MOSFETs 
  • Power Good Indicator

1.5A LDO (VTT), Buffered Reference (VTTREF)

  • Capable to Sink and Source Up to 1.5A 
  • LDO Input Available to Optimize Power Losses 
  • Requires Only 10μF Ceramic Output Capacitor 
  • Integrated Divider Tracks 1/2 VDDQ for both VTT and VTTREF 
  • Integrated Divider Tracks 1/2 VDDQ for both VTT and VTTREF
  • Accuracy ±20mV for both VTTREF and VTT 
  • Supports High -Z in S3 and Soft-Off in S4/S5


  • PWM Controller► Adjustable Current Limit with Low-Side RDS(ON) Sensing► Low Quiescent Supply Current► Quick Load-Step Response within 100ns► 1% VVDDQ Accuracy Over Line and Load► Adjustable 0.675V to 3.3V Output Range for 1.8V (DDR2), 1.5V (DDR3), 1.35V (DDR3L), 1.2V (LPDDR3), 1.2V (DDR4) and 1.1V (LPDDR4)► 4.5V to 26V Battery Input Range► Resistor Adjustable Frequency► Over-/Under-Voltage Protection► Internal Voltage Ramp Soft-Start ► Drives Large Synchronous Rectifier MOSFETs► Power Good Indicator
  • 1.5A LDO (VTT), Buffered Reference (VTTREF)► Capable to Sink and Source Up to 1.5A► LDO Input Available to Optimize Power Losses► Requires Only 10μF Ceramic Output Capacitor► Integrated Divider Tracks 1/2 VDDQ for both VTT and VTTREF► Accuracy ±20mV for both VTTREF and VTT► Supports High-Z in S3 and Soft-Off in S4/S5


  • DDR2/DDR3/DDR3L/LPDDR3/DDR4/LPDDR4 Memory Power Supplies
  • Notebook computers
  • SSTL18, SSTL15 and HSTL bus termination

RT8248AGQW Block Diagram
(Picture: Diagram)

Technical Parameters

  • Status
  • Active
  • Vs (typ) (V)
  • 5
  • Vin (min) (V)
  • 4.5
  • Vin (max) (V)
  • 26
  • Vout (min) (V)
  • 0.675
  • Vout (max) (V)
  • 3.3
  • Output Adj. Method
  • Resistor
  • Accuracy (+/ %)
  • 1
  • Freq (min) (kHz)
  • 260
  • Freq (max) (kHz)
  • 1500
  • Iq (typ) (mA)
  • 0.135
  • Features
  • Adjustable Current Limit;Adjustable Frequency;Diode Emulation Mode;Enable Input;Fast Transient Response;OCP;OVP;PSM;Power Good;UVP
  • Package Type
  • WQFN3x3-20

RT8248AGQW Documents

RT8248AGQW Related Products

Ratings and Reviews (1)

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  • **ndre***

    alles ok, top Verkäufer.

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Estimated Delivery Time: Dec 14 - Dec 19 days (choose Expedited at checkout).

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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.

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    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

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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 RT8248AGQW 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 RT8248AGQW devices; we pay more attention to the channels and quality of RT8248AGQW products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of RT8248AGQW chips? Including RICHTEK original factory information, Switching Regulators ; Single-Phase Step-Down Controller application, RT8248AGQW 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 RT8248AGQW 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 RT8248AGQW, 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 RT8248AGQW?
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 RT8248AGQW we delivered, we will accept the replacement or return of the RT8248AGQW 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 RT8248AGQW.
(3)The RT8248AGQW 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 RT8248AGQW datasheet pdf, RT8248A 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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