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TI power IC makes swift move to 9A

Posted: 24 May 2002 ?? ?Print Version ?Bookmark and Share

Keywords:tps54910? synchronous buck converter? dc voltage converter? voltage converter ic? voltage conversion?

Texas Instruments Inc. says its TPS54910 synchronous-buck (non-isolated) dc/dc converter chip can provide a continuous 9A at voltages down to <1V (adjustable).

The devicethe newest member of the company's Swift (switcher with integrated FET technology) familyis intended for point-of-load regulation in nominal 3.3V bus systems for optical networking, DSP, FPGA and microcomputer applications.

It integrates 12A power MOSFETs and control circuitry in a 28-pin package that is said to enable dc/dc converter designs with as little as 0.7 inch2 of board space.

"As processor core voltages drop, the 3.3V bus is becoming more popular at higher current levels," said Rich Nowakowski, product-marketing manager at TI Power Management Products.

Interactive software accessible from the company Web site lets designers speed development from basic design through component selection.

The software provides a bill of materials, a reference schematic, loop response graphs and an efficiency curve based on the designer's inputs. The designer chooses the external inductors and capacitors from the tool's database of components. Users can also add their favorite components to the database.

The TPS54910 includes integrated protection features, such as power good, overcurrent protection, thermal shutdown and undervoltage lockout. Its integrated synchronous rectifier and the low on-resistance (15 milliohms) of its power MOSFETs enable the device to achieve efficiencies >95 percent.

To address an application's switching noise sensitivity, the switching frequency can be one of two preset values or can be adjusted anywhere between the range of 280kHz and 700kHz, according to the manufacturer.

Additionally, the company's PowerPAD package is said to enable up to three times the thermal performance of other packaging without the need for bulky heat sinks.

The Swift software development tool is available free and can be downloaded from TI's power management Web site.

To further help system developers with power supply solution design, TI offers evaluation modules, reference designs and other support collateral.

Samples of the TPS54910 are available now; volume production of the converter chip is planned for this month. Suggested resale pricing is $5.69 each in quantities of 1,000.

EE Times

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