TPS65138A

www.ti.com TPS65138 TPS65138A SLVSAV3C – APRIL 2011 – REVISED MAY 2012 Dual output AMOLED Display Power Supply Check for Samples: TPS65138, TPS65138A FEATURES 1 2.9V to 4.5V Input Voltage Range 0.8% Output Voltage Accuracy VPOS Excellent Line Transient Regulation 300mA Output Current Fixed 4.62V Positive Output Voltage Digitally Programmable VNEG – TPS65138: -2.2V to -6.2V – TPS65138A: -2.2V to -5.2V -4.9V Default Value for VNEG Short Circuit Protection Thermal Hhutdown 3-mm × 3-mm QFN Package APPLICATIONS Active Matrix OLED DESCRIPTION The TPS65138 is designed to drive AMOLED displays (Active Matrix Organic Light Emitting Diode) requiring positive and negative supply rails. The device integrates boost converter and inverting buck boost converter designed suitable for battery operated products. The digital control pin (CTRL) allows programming the negative output voltage in digital steps. The TPS65138 uses a novel technology enabling excellent line and load regulation. This is required to avoid disturbance of the AMOLED display by the input voltage disturbances occurring during transmit periods in mobile phones. TYPICAL APPLICATION SCHEMATIC VIN 2.9V to 4.5V C1 10PFx2 Enable and Program VNEG C4 100nF L1 4.7PH PVIN TPS65138 SWP PGND CTRL OUTP OUTN CT GND SWN VL C5 100nF L2 4.7PH VPOS 4.62V/300mA C2 10PF VNEG -4.9V/300mA C3 10PF x 2 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical ...