Reduce EMI With SWIFT Converters In Space Constrained And Power-Dense Applications


TI unveiled the all new SWIFT converters (integrates MOSFETs and supports input voltage ranges from 3V-28V) that are designed 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. As claimed by the company, the newly launched synchronous DC/DC buck converters are the industry’s first high-current PMBus interface for adaptive voltage scaling (AVS) converters with frequency synchronisation reduce EMI. AVS is a closed-loop dynamic power minimisation technique that reduces power based on the actual operating conditions of the chip , i.e., the power consumption is continuously adjusted during the run time of the chip.

TI SWIFT 01The synchronous DC/DC buck converters TPS544B25 and TPS544C25 is capable of delivering a 20A or 30A current output from a 5mm x 7mm package. According to the press release, the highly integrated converters feature 0.5 per cent reference-voltage accuracy and full differential remote-voltage sensing to meet the voltage requirements of deep sub-micron processors. Frequency synchronisation 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.

SWIFT buck converters is globally available in a 40-pin PowerStack QFN package in 1000 unit quantities is priced at US$ 4.08 for 20-A TPS544B25 and US$ 4.49 for 30-A TPS544C25 according to the company release. The converters can be ordered through company authorised distributor.

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The TPS544B25 and TPS544C25 key features and benefits are as highlighted below:

  • Integrated power MOSFETs support 20A and 30A of continuous output current
  • On-chip PMBus interface and non-volatile memory simplify power-supply design and enable customisation
  • Voltage-control mode with input feed-forward improves noise margin and responds instantly to input voltage changes
  • Other features include internal soft start, input under-voltage protection, thermal shutdown and a reset function


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