Industry’s first high-current PMBus converters with frequency synchronization reduce EMI

DALLAS (August 3, 2015) – Texas Instruments (TI) (NASDAQ: TXN) today introduced the industry’s first 20-A and 30-A synchronous DC/DC buck converters with frequency synchronization for low-noise and reduced EMI/EMC and a PMBus interface for adaptive voltage scaling (AVS). TI’s SWIFT™ 20-A TPS544B25 and 30-A TPS544C25 converters integrate MOSFETs and feature small PowerStack™ QFN packages to drive ASICs in space-constrained and power-dense applications in various markets, including wired and wireless communications, enterprise and cloud computing, and data storage systems. Used in conjunction with TI’s award-winning WEBENCH^® online design tools, the converters simplify power conversion and speed the power supply design process. For more information, samples and an evaluation module, visit www.ti.com/PMBusSWIFT-pr.

The highly integrated converters feature 0.5 percent reference-voltage accuracy and full differential remote-voltage sensing to meet the voltage requirements of deep sub-micron processors. Frequency synchronization to an external clock eliminates beat noise and reduces EMI. Additionally, the TPS544B25 and TPS544C25 offer pin-strapping that enables the devices to start up without PMBus commands to an output voltage set by a single resistor. Programmability, real-time monitoring of the output voltage, current and external temperature, and fault reporting via PMBus simplify power-supply design, increase reliability, and reduce component count and system cost. Read a blog post on “Selecting the correct PMBus POL solution for your application.”

For applications such as enterprise Ethernet switches, TI also offers the UCD90240 24-rail PMBus power sequencer and power manager. Together, the TPS544C25 and UCD90240 provide a complete PMBus point-of-load (POL) and sequencing solution. Download the Complete PMBus Power System for Enterprise Ethernet Switches TI Designs reference design.

TPS544B25 and TPS544C25 key features and benefits

Integrated power MOSFETs support 20-A and 30-A of continuous output current.
On-chip PMBus interface and non-volatile memory simplify power-supply design and enable customization. Read a blog post on “PMBus – what is the value anyway?”
Voltage-control mode with input feed-forward improves noise margin and responds instantly to input voltage changes. Watch a video on the benefits of adaptive voltage scaling.
Other features include internal soft start, input under-voltage protection, thermal shutdown and a reset function.

About SWIFT products from Texas Instruments

Part of TI’s portfolio of industry-leading DC/DC converters, the SWIFT product line includes more than 130 converters with integrated MOSFETs supporting input voltage ranges from 3 V to 28 V. SWIFT products provide high density and performance; power DSPs, FPGAs and other processors; and are fully functional in TI’s WEBENCH Power Design tools. Get more information about TI’s SWIFT DC/DC converters.

About WEBENCH tools from Texas Instruments

The WEBENCH Designer and Architect component libraries include more than 40,000 components from 120 manufacturers. TI’s distribution partners update price and availability hourly for design optimization and production planning. Offered in eight languages, users can compare complete system designs and make supply-chain decisions in minutes. Start a cost-free design in TI’s WEBENCH design environment.

Availability, packaging and pricing

SWIFT buck converters are available in volume now from TI and its authorized distributors. Packaged in a 40-pin, 5-mm by 7-mm by 1-mm PowerStack QFN package, the 20-A TPS544B25 is priced at US$4.08 and the 30-A TPS544C25 is priced at US$4.49 in 1,000-unit quantities. Order an evaluation module for the TPS544B25 and TPS544C25.

Find out more about TI’s power portfolio:

Download the Complete PMBus Power System for Enterprise Ethernet Switches TI Designs reference design. See all of the power designs in TI’s reference design library.
Review the guide to TI’s extensive portfolio of PMBus product solutions, design tools and technical resources.
Read the white paper, “How to Select Digital Power ICs.”
Search for solutions, get help and share knowledge in the TI E2E™ Community Power Management forum.

About Texas Instruments

Texas Instruments Incorporated (TI) is a global semiconductor design and manufacturing company that develops analog ICs and embedded processors. By employing the world’s brightest minds, TI creates innovations that shape the future of technology. TI is helping more than 100,000 customers transform the future, today. Learn more at www.ti.com.