TI Unveils TPS65120 Power Management IC

Texas Instruments Inc. (TI, Dallas, TX) announced an advanced power conversion integrated circuit for portable, small form factor color displays. The new single-inductor, quadruple-output dc-dc powers amorphous silicon and low-temperature poly-silicon displays used in smart phones, PDAs, portable DVD players, digital cameras and other portable applications.

Available in a 3 mm x 3 mm QFN package, the new TPS65120 converter supports input voltages from 2.5 V to 5.5 V. The flexible device uses a single inductor to generate three display voltages, including an adjustable main output voltage range of 3 V to 5.6 V with load current up to 25 mA. The output is post-regulated to provide a low ripple source drive voltage for the LCD display. The TPS65120 can achieve a positive gate voltage as high as 20 V at 2 mA and a negative gate voltage as low as -18 V at 2 mA to support the gate drive of the LCD panel. A pulse-width modulation control scheme is used to time-multiplex the inductor between the three outputs.

The TPS65120 provides fast transient response and maintains up to 83% power conversion efficiency for extended battery life. The high switching frequency allows the use of ultra-thin 8.2 µH or 10 µH inductors, allowing a 1 mm component profile solution. In addition, the circuit integrates internal current limiting for high reliability under fault conditions. The TPS65120 also features automatic or programmable power sequencing. A linear voltage regulator with a fixed 1.8 V or 3.3 V output is available to supply adequate power to the logic circuitry of the LCD panel.

The TPS65120 LCD power converter family is available now. The devices comes in a 16-pin, 3 mm x 3 mm, QFN package. Pricing in quantities of 1,000 is $2.25.