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

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.

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.

About WEBENCH tools from Texas Instruments
The WEBENCH Designer and Architect component libraries include more than 40,000 components from 120 manufacturers. TI’s distribution partners update price and availability hourly for design optimization and production planning. Offered in eight languages, users can compare complete system designs and make supply-chain decisions in minutes. Start a cost-free design with the TPS543C20 in TI’s WEBENCH design environment.

Availability and pricing
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 and is priced in small reels at US$5.24 for 1,000-unit quantities.

Find out more about TI’s power portfolio

• Get more information on TI’s SWIFT portfolio of converters and all of TI’s power management products.
• See all of the power designs in TI’s reference design library.
• Search for solutions, get help and share knowledge in the TI E2E™ Community Power Management forum.

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