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TPS54290 - TI introduces industry’s first 12-V dual-channel synchronous buck converter with integrated FETs

25th January 2010

Texas Instruments

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Datasheet

Texas Instruments today introduced its first dual-output fully synchronous SWIFT power management integrated circuit. The TPS54290 1.5-A/2.5-A converter simplifies power design in consumer electronics with a 12-V power supply, such as a set top box or digital TV.

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.

Key features and benefits of TPS54290:

· Dual output synchronous buck converter with four integrated MOSFETs provides fully synchronous conversion with 90 percent efficiency, while using 35 percent less board space compared to non-synchronous conversion solutions.

· Current mode control simplifies external compensation, giving the designer greater flexibility when choosing different types of output capacitors.

· 180º out-of-phase operation minimizes ripple current through the input capacitor. Input capacitance is reduced by up to 50 percent, which helps lessen electromagnetic interference.