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

08/21/2015

Texas Instruments 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.

Find more details on www.ti.com.