High-current PMBus converters integrate MOSFETs

Posted By : Nat Bowers
High-current PMBus converters integrate MOSFETs

Texas Instruments introduces the industry’s first 18-V, 20-A and 30-A synchronous DC/DC buck converters with PMBus interface. The SWIFT TPS544B20 and TPS544C20 converters feature small QFN packages and integrated MOSFETs 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.

The highly integrated converters feature 0.5 percent reference voltage accuracy and fully differential remote voltage sensing to meet voltage requirements of deep sub-micron processors. Selectable D-CAP or D-CAP2 adaptive on-time control mode is easy to use, provides very fast load transient response and reduces external component count.  Programmability, real-time monitoring of the output voltage, current and external temperature, and fault reporting via PMBus simplifies power supply design, increases reliability and reduces component count and system cost.

TPS544B20 and TPS544C20 key features and benefits:

  • Integrated power MOSFETs support 20-A and 30-A continuous output current.
  • On-chip PMBus interface and non-volatile memory simplify power supply design, provide voltage, current and temperature monitoring, and enable customisation of the power supply.
  • Selectable D-CAP or D-CAP2 adaptive on-time control mode eliminates output capacitors and requires no loop compensation, which minimises the external component count.
  • Other features include internal soft start, input under-voltage protection and thermal shutdown.

The SWIFT buck converters are available in volume now from TI and its authorised distributors. Packaged in a 40-pin, 5x7x1mm QFN package, the 20-A TPS544B20 is priced at $3.70 (USD) and the 30-A TPS544C20 is priced at $3.90 (USD) in 1,000 unit quantities. Order an evaluation module for the TPS544B20 and TPS544C20.


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