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

• <1.0µA 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