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Texas Instruments TPS51225RUKT
- Part No.:
- TPS51225RUKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
TPS51225RUKT.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 20WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
TPS51225RUKT from Texas Instruments is a dual synchronous step-down controller for notebook and embedded system power rails. The device controls external MOSFET power stages to generate 5V and 3.3V supplies while integrating LDO support for bias and always-on rail functions.
As part of the TPS51225 product family, TPS51225RUKT combines D-CAP control, 4.5V to 24V input operation, 5V and 3.3V rail support, WQFN-20 packaging, enable-controlled sequencing, and suffix-defined light-load behavior. For engineers reviewing the TPS51225RUKT datasheet, TPS51225RUKT pinout, TPS51225RUKT application, or TPS51225RUKT equivalent, this device is widely used in notebook computers, tablet power systems, embedded computing boards, motherboard 5V and 3.3V rails, industrial PCs, and compact system-power modules.
Technical Context
In computing platforms, TPS51225RUKT operates as a two-channel buck controller that drives external MOSFETs for the main 5V and 3.3V system rails. External power stages allow the rail current and thermal behavior to be scaled to the motherboard design.
The D-CAP control architecture supports fast load-transient response without a traditional complex compensation network. The Auto-skip light-load mode behavior defines how the device manages light-load operation for efficiency and acoustic performance.
TPS51225RUKT is commonly used where a compact WQFN controller, integrated LDO support, EN1/EN2 rail control, VREG3 always-on function, and mini-reel production packing are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | Dual synchronous step-down controller with integrated LDO support. |
| Input Voltage Range | 4.5V to 24V input range. |
| Target Outputs | 5V and 3.3V system rails. |
| Control Mode | D-CAP control architecture. |
| Light-Load Mode | Auto-skip light-load mode |
| Always-On LDO | VREG3 always-on LDO function listed for this orderable option. |
| Package | 20-pin WQFN RUK package. |
| Packing | RUKT mini-reel quantity 250. |
Pinout & Package
The TPS51225RUKT pinout includes controller supply pins, high-side and low-side MOSFET gate-drive pins, switch-node sensing, feedback inputs, LDO outputs, enable pins, power-good/status functions, and ground pins.
For PCB design, MOSFET gate-drive loops and switch-node copper should be compact, feedback traces should be routed away from switching nodes, and LDO decoupling should be placed close to the controller.
| Pin / Function | PCB Design and Circuit Role |
|---|---|
| VIN / VREG | Controller input and internal regulator supply functions. |
| UGATE / LGATE | Gate-drive outputs for external synchronous buck MOSFETs. |
| SW / LL | Switch-node and low-side sensing functions. |
| FB5 / FB3 | Feedback inputs for 5V and 3.3V rails. |
| EN1 / EN2 | Enable controls for rail sequencing. |
| VREG3 / VREG5 | Integrated LDO or bias regulator outputs. |
| PGOOD | Power-good status output. |
| GND / Exposed Pad | Ground and thermal return path. |
Key Features
- Dual controller architecture supports 5V and 3.3V rails.
- External MOSFETs allow scalable current design.
- D-CAP control supports fast transient response.
- Integrated LDO support reduces bias-regulator count.
- Enable pins support controlled startup sequencing.
- 20-pin WQFN package supports compact motherboard layouts.
Applications
| Notebook Computers | Tablet Systems |
|---|---|
|
Use Scenario: Used in main system-power rails. IC Role: Controls 5V and 3.3V buck stages. Use Value: Supports efficient motherboard power conversion. |
Use Scenario: Used in compact computing platforms. IC Role: Generates regulated system rails. Use Value: Improves power-tree density. |
| Embedded Computing | Motherboard Power |
|
Use Scenario: Used in industrial PCs and modules. IC Role: Provides dual rail control with LDO support. Use Value: Supports scalable power stages. |
Use Scenario: Used around chipset and peripheral rails. IC Role: Coordinates dual buck control. Use Value: Improves system rail supervision. |
Equivalent & Alternatives
When evaluating a TPS51225RUKT equivalent, engineers should compare dual-rail support, light-load behavior, always-on LDO configuration, package, gate-drive requirements, and control architecture.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS51275RUKT | Texas Instruments dual 5V/3.3V synchronous controller family with different feature set and light-load behavior. | Used in notebook system-power rails. | Compare LDO support, skip mode, pinout, and power architecture. |
| TPS51125RGER | Texas Instruments notebook dual synchronous buck controller with different package and control details. | Used in 5V/3.3V notebook rails. | Compare package, enable behavior, LDO functions, and board compatibility. |
Compared with TPS51275RUKT, TPS51225RUKT should be selected when the TPS51225 family pinout and Auto-skip light-load mode behavior match the motherboard design. TPS51225RUKT vs TPS51125RGER selection depends on LDO configuration, package, power-good behavior, and existing PCB layout.
Quality
TPS51225RUKT should be sourced as original Texas Instruments components through traceable supply channels. Quality checks may include WQFN package inspection, top-mark validation, solderability testing, output-voltage verification, and regulator load testing.
Production validation should include startup behavior, load transients, thermal performance, protection response, output ripple, and PCB layout review for the switching and linear regulator sections.
Availability
TPS51225RUKT available at Aetrix Electronics and is suitable for notebook, tablet, embedded computing, and motherboard 5V/3.3V rail systems requiring stable power-management component supply support.
Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.
For production builds, confirming package, output-voltage option, rail-current budget, lifecycle status, lead time, and sourcing continuity helps reduce procurement risk.
Manufacturer
Texas Instruments is a global semiconductor manufacturer specializing in analog ICs, embedded processors, power-management devices, interface products, sensing solutions, and industrial semiconductor technologies.
The TPS51225 product family is a Texas Instruments dual synchronous step-down controller series for notebook 5V and 3.3V system rails with integrated LDO support.
FAQ
What is TPS51225RUKT used for?
TPS51225RUKT is used for notebook computers, tablets, embedded computing boards, industrial PCs, and motherboard 5V/3.3V system rails.
Where can I find the TPS51225RUKT datasheet download?
The TPS51225RUKT datasheet is available through Mouser and Texas Instruments documentation and includes electrical ratings, package information, and application circuits.
What should be considered in TPS51225RUKT pinout design?
Designers should keep MOSFET gate-drive loops compact, route feedback away from switch nodes, and place LDO decoupling close to the IC.
Does TPS51225RUKT include LDO support?
Yes. The TPS51225 family includes 5V/3.3V LDO support depending on the orderable option.
What are common TPS51225RUKT equivalent solutions?
Common candidates include TPS51275RUKT and TPS51125RGER depending on rail requirements, package, LDO behavior, and control mode.
TPS51225RUKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP™
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (2), Linear (LDO) (2)
- Number of Outputs:
- 4
- Frequency - Switching:
- 300kHz, 355kHz
- Voltage/Current - Output 1:
- Controller
- Voltage/Current - Output 2:
- Controller
- Voltage/Current - Output 3:
- 3V, 100mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 5.5V ~ 24V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WQFN (3x3)
TPS51225RUKT FAQ
1.How can I place an order for TPS51225RUKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51225RUKT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS51225RUKT reliable?
The price and inventory of TPS51225RUKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51225RUKT is usually 5 days.
3.What payment methods are accepted for TPS51225RUKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51225RUKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51225RUKT?
TPS51225RUKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51225RUKT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS51225RUKT?
For technical support, including TPS51225RUKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51225RUKT requirements.
6.How does Aetrix verify that TPS51225RUKT is sourced from the original manufacturer or authorized distributors?
All TPS51225RUKT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS51225RUKT meets industry standards.
7.What is the process for return or replacement of TPS51225RUKT?
All TPS51225RUKT units undergo pre-shipment inspection (PSI). If there is an issue with TPS51225RUKT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS51225RUKT part is unused and in its original packaging.
Return procedure for TPS51225RUKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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