Power

DC/DC buck converter features innovative control topology

20th September 2017
Lanna Cooper

Texas Instruments has introduced the 16V input, 40A synchronous DC/DC buck converter with an internally compensated Advanced-Current-Mode (ACM) control topology supporting frequency synchronisation. TI’s TPS543C20 SWIFT converter provides enhanced efficiency by integrating its latest generation of low resistance high and low side MOSFETs into a thermally efficient small-footprint package.

Designers can stack two converters side by side to drive loads up to 80A for processors in space-constrained and power-dense applications in various markets, including wired and wireless communications, enterprise and cloud computing, and data storage systems.

The internally compensated ACM control topology with fast transient response maintains stability over a wide range of input and output voltages.

What makes ACM different is that it is an emulated peak-current-mode control topology that internally generates a ramp with the ability to dynamically adjust for stability over a wide range of operating switching frequencies.

This provides the best of both traditional fixed frequency for low noise operation and Constant On-Time (COT) control for fast transient without external compensation.

To understand the difference between TI's various control modes, read the blog post - 'Lightning-fast internally compensated ACM topology - what can it do for you?' and the 'Control-Mode Quick Reference Guide'.

TPS543C20 key features and benefits

  • Provides greater than 90% efficiency at a 40A peak-load current
  • Maintains 0.5% reference-voltage accuracy over temperature and full differential remote-voltage sensing to meet the voltage-accuracy requirements of deep submicron processors
  • Provides up to 80A at point-of-load when stacking two converters
  • Offers very high power density and the PowerStack Quad Flat No-leads (QFN) package enables easy heat sinking from the single ground pad

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