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Step-down converter eases power design in consumer electronics

Dallas, Tex.—Texas Instruments Inc. has introduced its first dual-output fully synchronous SWIFT power management IC, a 1.5-A/2.5-A converter that simplifies power design in consumer electronics with a 12-V power supply, such as a set top box or digital TV.

Dubbed TPS54290, the SWIFT device operates from a 4.5-V to 18-V input supply voltage, and supports output voltages as low as 0.8 V with a 90 percent power efficiency rating. The TPS54290 is set at a fixed frequency of 300 kHz. Two other family members, the TPS54291 and TPS54292, provide switching frequencies of 600 kHz and 1.2 MHz, further reducing the DC/DC solution size.

The TPS54290 features a dual output synchronous buck converter with four integrated MOSFETs that provides fully synchronous conversion with 90 percent efficiency, while using 35 percent less board space compared to non-synchronous conversion products, TI said.

It also includes a current mode control that simplifies external compensation, giving the designer greater flexibility when choosing different types of output capacitors.

Pricing: $2.95 in 1,000-unit quantities.
Availability: Now.
Datasheet: click here.

Texas Instruments, www.ti.com

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