TI unveils industry's highest power density 12-V, 10-A, 10-MHz DC/DC converter

Ultra-small SWIFT™ step-down converter features unique topology to achieve four times higher current density

Texas Instruments (TI) introduced the industry's first 12-V, 10-A, 10-MHz series-capacitor buck converter that achieves more than 50 A/cm³ in current density, which is four times higher than any other 12 V power management component or solution available today. The unique topology of the TPS54A20 SWIFT synchronous DC/DC converter enables high-frequency operation at up to 5 MHz per phase without special magnetics or compound semiconductors, which designers can use for 8-V to 14-V input and 10-A output applications. By using the step-down converter together with TI's WEBENCH® Power Design tool, engineers can get their space- and height-constrained point-of-load (POL) telecom and networking power-supply designs to market faster.

The TPS54A20 features a unique two-phase, series-capacitor DC/DC buck topology that merges a switched-capacitor circuit with a multiphase buck converter. This capacitive conversion technology enables efficient, high-frequency operation and measures as much as seven times smaller than conventional converters.

The TPS54A20 typical application circuit.

TPS54A20 key features and benefits

• Tiny solution:
  Small HotRod™ quad flat no-lead (QFN) packaging and inexpensive, tiny 2- to 5-MHz inductors enable a 131-mm² solution size that consumes 50 percent less area than similar 500-kHz DC/DC converter designs.
   
• Low profile:
  Measuring less than 2 mm in height, the reduced size, weight and bill of materials (BOM) allows placement of tiny 10-A voltage regulators on the back side of a printed circuit board (PCB), enabling engineers to take advantage of the small size that the TPS54A20 offers for industrial servers or other space-constrained applications.
   
• Multi-megahertz operation:
  A 14-ns minimum on-time allows for 4-/7-/10-MHz operation without compromising efficiency or electromagnetic interference (EMI) performance.

HotRod QFN structure and die attachment.

Availability, packaging and pricing

The new DC/DC converter is available in volume now from TI and its authorized distributors. Offered in a 20-pin, 3.5-mm-by-4-mm-by-1-mm thermally enhanced HotRod QFN package, the TPS54A20 is priced at US$3.25 in 1,000-unit quantities. Order the 4-MHz, 10-A TPS54A20EVM-770 synchronous dual-phase converter evaluation module and download the PSpice transient models.

The TPS54A20EVM-770 synchronous dual-phase converter evaluation module.