TPS65120

www.ti.com TPS65120, TPS65121, TPS65123, TPS65124 SLVS531A – JUNE 2004 – REVISED MARCH 2005 SINGLE-INDUCTOR QUADRUPLE-OUTPUT TFT LCD POWER SUPPLY FEATURES Main Output, VMAIN – Adjustable Voltage, 3.0 V to 5.6 V/25 mA – Post-Regulated for Low Ripple (5mVPP) – ±0.8% Typical Accuracy – Efficiency up to 83% Positive Output, VGH – Adjustable Voltage up to 20 V/2 mA – ±3% Typical Accuracy Negative Output, VGL – Adjustable Voltage down to -18 V/2 mA – ±3% Typical Accuracy Auxiliary 1.8 V/3.3 V Linear Regulator Automatic or Programmable Power Sequencing Complete 1 mm Component Profile Solution 2.5 V to 5.5 V Input Voltage Range Output Short Circuit Protected 16-Pin QFN Package (3 × 3 × 0,9 mm) APPLICATIONS Small Form Factor a-Si and LTPS TFT LCD Cell Phones, Smart Phones PDAs, Pocket PCs Portable DVD Digital-Still Cameras, Camcorders Handheld Instruments Portable GPS Car Navigation Systems DESCRIPTION The TPS6512x DC-DC converter supplies all three voltages required by amorphous-silicon (a-Si) and low-temperature poly-silicon (LTPS) TFT-LCD displays. The compact layout of the TPS6512x 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...