TPS54331DR Texas Instruments 28V/3A Step-Down DC-DC Converter Eco-mode 570kHz SOIC-8

TPS54331DR Product Overview

The TPS54331DR is a 28V, 3A non‑synchronous buck DC-DC converter from Texas Instruments, integrating a low RDS(on) high‑side MOSFET. The TPS54331DR supports a wide input voltage range of 3.5V to 28V with an adjustable output voltage down to 0.8V and continuous output current up to 3A. The TPS54331DR features a fixed 570kHz switching frequency that allows the use of small external components while maintaining high efficiency. Housed in a standard 8‑pin SOIC package, the TPS54331DR is suitable for set‑top boxes, CPE equipment, LCD displays, industrial power supplies, car audio power, and 5V/12V/24V distributed power systems.

TPS54331DR Core Features

The TPS54331DR integrates an 80mΩ high‑side MOSFET supporting 3A continuous output current, with a 3.5V to 28V wide input voltage range compatible with 5V, 12V, and 24V power bus systems.

The TPS54331DR built‑in pulse‑skipping Eco‑mode is automatically activated under light‑load conditions, improving conversion efficiency at low output currents. The TPS54331DR fixed 570kHz switching frequency allows the use of smaller inductors and output capacitors, reducing overall solution size.

The TPS54331DR features current‑mode control with internal slope compensation, simplifying external compensation network design and supporting ceramic output capacitors. The TPS54331DR typical shutdown quiescent current is only 1μA, making it suitable for battery‑powered applications.

The TPS54331DR protection features include adjustable slow‑start for inrush current limiting, programmable UVLO threshold, overvoltage transient protection, cycle‑by‑cycle current limiting, frequency foldback, and thermal shutdown, providing comprehensive protection for the device and load under overload conditions.

TPS54331DR Applications

The TPS54331DR is widely used in consumer electronics such as set‑top boxes, CPE equipment, LCD displays, and peripherals. In the industrial sector, the TPS54331DR is suitable for industrial power supplies and car audio power. The TPS54331DR is also commonly used in 5V, 12V, and 24V distributed power systems. Battery charger applications benefit from the TPS54331DR 1μA shutdown current low‑power characteristic.

TPS54331DR Key Advantages

The TPS54331DR‘s wide input voltage range (3.5V–28V) and 3A output capability cover a variety of power system requirements from 5V to 24V. The TPS54331DR 570kHz high switching frequency, combined with current‑mode control, allows the use of small ceramic output capacitors, reducing external component count and PCB area. The TPS54331DR Eco‑mode pulse‑skipping feature improves light‑load efficiency, while the 1μA shutdown current supports battery‑powered scenarios. The TPS54331DR integrates cycle‑by‑cycle current limiting, frequency foldback, and thermal shutdown protection to ensure system safety under abnormal conditions such as overload. The TPS54331DR SOIC-8 standard package is easy to solder and suitable for automated production, making it a cost‑effective buck converter solution for consumer electronics, industrial, and automotive power applications.

Why Choose QIXINWEI

Years of experience in the electronics industry. Trusted by global customers.

Massive In-Stock Inventory – Ready to ship promptly

BOM Matching Service – One-stop solution, save time

PCBA Customization – Professional engineering team creates tailor-made solutions based on your needs

Cost-Effective & Efficient – Better channel, better cost

A dedicated team makes your procurement smoother.

Contact us for BOM quotes or PCBA inquiries

FAQ

1. What is TPS54331DR?
The TPS54331DR is a 28V, 3A nonsynchronous buck converter from Texas Instruments, integrating a low RDS(on) (80mΩ) high-side MOSFET. The TPS54331DR belongs to TI's SWIFT™ series of DC-DC converters and comes in an SOIC-8 package, designed for applications requiring a wide input voltage range and high output current.

2. What are the key specifications of TPS54331DR?
Key specifications of the TPS54331DR are as follows:

• Input Voltage Range: The TPS54331DR supports 3.5V to 28V

• Output Voltage Range: The TPS54331DR provides 0.8V to 25V (adjustable)

• Output Current: The TPS54331DR delivers up to 3A

• Switching Frequency: The TPS54331DR operates at 570kHz (fixed)

• Operating Temperature: The TPS54331DR works from -40°C to +150°C (junction)

• Quiescent Current (Iq): The TPS54331DR has a typical 110μA

• Shutdown Current: The TPS54331DR features 1μA typical

3. What package does TPS54331DR use?
The TPS54331DR uses the SOIC-8 package (Small Outline Integrated Circuit, 8 pins), measuring 3.90mm × 4.90mm. The TPS54331DR is also available in a thermally enhanced SO PowerPAD™ package.

4. What applications is TPS54331DR suitable for?
The TPS54331DR is widely used in consumer applications such as set-top boxes, CPE equipment, LCD monitors, peripherals, and battery chargers; industrial and automotive audio power supplies; and 5V, 12V, and 24V distributed power systems. With a 1μA shutdown current, the TPS54331DR is also well-suited for battery-powered applications.

5. What development tools support TPS54331DR?
TI provides the WEBENCH Power Designer online tool for quickly generating complete power supply designs for the TPS54331DR. Additionally, TI's website offers extensive datasheets, application notes, and user guides for the TPS54331DR.

6. What is the operating temperature range of TPS54331DR?
The TPS54331DR junction temperature (TJ) operating range is -40°C to +150°C.

7. What are the key features of TPS54331DR?
The TPS54331DR integrates a rich set of features:

• Eco-mode™ pulse skipping: The TPS54331DR automatically activates under light-load conditions to improve efficiency

• Current mode control: The TPS54331DR features internal slope compensation, simplifying external compensation design

• Programmable UVLO: The TPS54331DR undervoltage lockout threshold set via resistor divider

• Adjustable soft start: The TPS54331DR limits inrush current during startup

• Overvoltage transient protection: The TPS54331DR limits voltage overshoot during startup and transients

• Cycle-by-cycle current limiting, frequency foldback, and thermal shutdown: The TPS54331DR protects device and load under overload conditions

8. What are the alternative models for TPS54331DR?
In the same series as the TPS54331DR, TPS54231DR is the 2A output current version. Additionally, SCT9330STER from SCT can serve as an alternative to the TPS54331DR (3A synchronous buck, 30V input). TPS62933 is TI's recommended next-generation device for the TPS54331DR with higher frequency, lower IQ, and improved EMI performance.

9. What peripheral interfaces does TPS54331DR support?
The TPS54331DR connects to external circuits through the following 8 pins:

• VIN (Pin 1) : Input power pin of the TPS54331DR, requires ceramic bypass capacitor to GND

• EN (Pin 2) : Enable pin of the TPS54331DR, can program UVLO threshold via resistor divider

• BOOT (Pin 3) : High-side MOSFET driver pin of the TPS54331DR

• PH/EN (Pin 4) : Phase/Enable control of the TPS54331DR

• COMP (Pin 5) : Compensation pin of the TPS54331DR, connects to external compensation network

• FB (Pin 6) : Feedback pin of the TPS54331DR, sets output voltage via resistor divider

• SS/TR (Pin 7) : Soft-start/Tracking pin of the TPS54331DR

• SW (Pin 8) : Switching node of the TPS54331DR, connects to inductor

10. What are the design considerations when using TPS54331DR?
Key design considerations for the TPS54331DR include:

• Input voltage: For the TPS54331DR, ensure it stays within the 3.5V to 28V range; exceeding may damage the chip

• Output load: Current and voltage must remain within specified limits for the TPS54331DR

• External components: For the TPS54331DR, follow the datasheet recommendations for input/output filter capacitors, inductor, feedback resistors, and compensation network

• Thermal management: The TPS54331DR SOIC-8 package has limited heat dissipation; proper PCB thermal design is critical for high output current operation