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TPS65138
TPS65138A
www.ti.com SLVSAV3C – APRIL 2011 – REVISED MAY 2012 Dual output AMOLED Display Power Supply
Check for Samples: TPS65138, TPS65138A FEATURES APPLICATIONS 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 Г— 3-mm QFN Package 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
L1
4.7PH VPOS …