Unique DC/DC converter combines true fixed frequency and ultra-fast transient response with integrated compensation

TI’s stackable 16-V input, 40-A SWIFT™ DC/DC buck converter features innovative control topology

Texas Instruments (TI) (NASDAQ: TXN) today 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. For more information, samples and an evaluation module, see www.ti.com/tps543c20-pr-eu.

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. Read the blog post, “Lightning-fast internally compensated ACM topology – what can it do for you?” and the “Control-Mode Quick Reference Guide” to understand the difference between TI’s various control modes.

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.

TPS543C20 support and tools

• Download the 1V, 20A Highly Integrated Synchronous Buck Converter Reference Design and speed up your design process with TI’s WEBENCH^® online design tools.
• Order the 40-A TPS543C20EVM-799 or stacked 80-A TPS543C20EVM-869 evaluation modules.

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.