40A DC-DC converter combines true fixed frequency with integrated compensation
The 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 internally compensated ACM control topology with fast transient response maintains stability over a wide range of input and output voltages. This emulates a 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 and so 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 TPS543C20 provides greater than 90 percent efficiency at a 40-A peak-load current and 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.
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 and is priced in small reels at US$5.24 for 1,000-unit quantities.
For more information, samples and an evaluation module, see www.ti.com
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