Texas Instruments Introduces Unique SWIFT DC/DC Converter with Integrated Switching Frequency Compensation

Texas Instruments (TI) introduced the industry's 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.

The new TPS543C20 SWIFT converter provides greater than 90 percent efficiency at a 40-A peak-load current, while maintaining 0.5 percent reference-voltage accuracy over temperature and full differential remote-voltage sensing to meet the voltage-accuracy requirements of deep submicron processors. It also offers very high power density and the PowerStack quad flat no-leads (QFN) package enables easy heat sinking from the single ground pad.

TI offers the 40-A TPS543C20EVM-799 or stacked 80-A TPS543C20EVM-869 evaluation modules, a 1V, 20A Highly Integrated Synchronous Buck Converter Reference Design, and its WEBENCH online design tools to accelerate the design process. 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.

The TPS543C20 is now available, offered in a 40-pin, 5-mm-by-7-mm-by-1.5-mm PowerStack QFN package and is priced in small reels at US$5.24 for 1,000-unit quantities.
www.ti.com