Texas Instruments Inc. (TI) introduces 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 to 18 V input supply voltage, and supports output voltages as low as 0.8 V with a 90% 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 include a dual output synchronous buck converter with four integrated MOSFETs that provides fully synchronous conversion with 90% efficiency, while using 35% 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; and 180º out-of-phase operation minimizes ripple current through the input capacitor. Input capacitance is reduced by up to 50%, which helps lessen electromagnetic interference.
For more information, contact Texas Instruments Inc., 12500 TI Blvd., Dallas, TX 75243. Phone: 972-644-5580.