AAT3190 Positive/Negative Charge Pump for Voltage Bias

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. The dual low-power charge pumps independently regulate a positive (VPOS) and negative (VNEG) output voltage. These outputs use external diode and capacitor multiplier stages (as many stages as required) to regulate output voltages up to ±25V. Built-in soft-start circuitry prevents excessive in-rush current during start-up. A high switching frequency enables the use of small external capacitors. The device’s shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1.0μA. The AAT3190 is available in a Pb-free MSOP-8 or TSOPJW-12 package and is specified over the -40°C to +85°C operating temperature range.

技术特性

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

应用领域 APPLICATION

CCD Sensor Voltage Bias
OLEDs
Passive-Matrix Displays
Personal Digital Assistants (PDAs)
TFT Active-Matrix LCDs

订购信息 Ordering Information

AAT3190

AAT3190 典型应用

应用技术支持与电子电路设计开发资源下载	版本信息	大小
AAT3190 数据资料DataSheet下载:pdf	Rev.V2	2 页