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General Description

The AAT3190 charge pump controller provides the regulated positive and negative voltage biases required by active matrix thin-film transistor (TFT) liquid-crystal displays (LCDs), charge-coupled device (CCD) sensors, and organic light emitting diodes (OLEDs). Two low-power charge pumps convert input supply voltages ranging from 2.7V to 5.5V into two independent output voltages.

Features

? VIN Range: 2.7V to 5.5V

? Adjustable ± Dual Charge Pump

? Positive Supply Output Up to +25V

? Negative Supply Output Down to -25V

? Up to 30mA Output Current

? 1.0MHz Switching Frequency

? <1.0?A Shutdown Current

? Internal Power MOSFETs

? Internally Controlled Soft Start

? Fast Transient Response

? Ultra-Thin Solution (No Inductors)

? -40°C to +85°C Temperature Range

? Available in 8-Pin MSOP or 12-Pin TSOPJW Package

Applications

? CCD Sensor Voltage Bias

? OLEDs

? Passive-Matrix Displays

? Personal Digital Assistants (PDAs)

? TFT Active-Matrix LCDs