At the 2011 Applied Power Electronics Conference (APEC), Texas Instruments introduced what it believes are the industry’s smallest, most efficient step-down regulators with integrated FETs to support up to 25 A for telecommunications, networking and other applications.
The 25 A, 14 V, TPS56221 synchronous SWIFT switcher with integrated NexFET MOSFETs achieves a power density greater than 12,2 W/cm³ with greater than 90% efficiency at high loads from a 12 V input to a 1,3 V output, delivering up to 25 A of continuous output current at 500 kHz switching frequency. The TPS56121, on the other hand, is a 15 A, 14 V switcher.
Both devices come in a thermally enhanced 5 x 6 mm QFN package, and achieve a total solution size of 315 mm². They are the first switchers to integrate TI’s NexFET technology, providing increased thermal performance, protection, efficiency and reliability. The ICs offer three selectable frequencies of 300 kHz, 500 kHz and 1 MHz, and support input voltages of 4,5 V to 14 V.
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