19 Sep 2017

DC/DC buck converter features innovative control topology

Texas Instruments has introduced the first 16-V input, 40-A synchronous DC/DC buck converter with an internally compensated advanced-current-mode (ACM) control topology supporting frequency synchronization.

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 80 A 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 unique 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.

TPS543C20 key features and benefits - Provides greater than 90 percent efficiency at a 40-A peak-load current.

  • Maintains 0.5 percent reference-voltage accuracy over temperature and full differential remote-voltage sensing to meet the voltage-accuracy requirements of deep submicron processors.

  • Provides up to 80 A 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.

For similar applications at 25 A, TI offers the TPS543B20 in a pin-to-pin-compatible PowerStack QFN package. For those applications requiring PMBus to support telemetry, TI offers the stackable 35-A TPS546C23 SWIFT synchronous buck converter.

Available now from through the TI store and authorized distributors, the TPS543C20 is offered in a 40-pin, 5-mm-by-7-mm-by-1.5-mm PowerStack QFN package .

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