TPS65120RGTR

The TPS65120RGTR is a DC to DC Converter that supplies all three voltages required by amorphous-silicon (a-Si) and low-temperature poly-silicon (LTPS) TFT-LCD displays. The compact layout of the device uses a single inductor to generate independently-regulated positive and negative outputs. A free-running variable peak current PWM control scheme time-multiplexes the inductor between outputs. This control architecture operates at a pseudo-fixed-frequency to provide fast response to line and load transients while maintaining a relatively constant switching frequency and high efficiency over a wide range of input and output voltages. The main output, VMAIN, is post-regulated to provide a low-ripple source drive voltage for the LCD display. The device has internal current limiting for high reliability under fault conditions. Additionally, the device offers a fixed output linear regulator for the LCD logic circuitry.

• 3 to 5.6V/25mA Adjustable main output
• Post-regulated main output for low ripple (5mVPP)
• Positive output - Adjustable voltage up to 20V/2mA and ±3% typical Accuracy
• Negative output - VGL Adjustable voltage down to -18V/2mA and ±3% typical Accuracy
• Auxiliary 1.8V/3.3V Linear regulator