AAT3190

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), CCD Sensors, and 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 (V_POS) and a negative (V_NEG) output voltage. These outputs use external diode and capacitor multiplier stages (as many stages as required) to regulate output voltages up to *Plus-or-minus*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 shutdown feature disconnects the load from V_IN and reduces the quiescent current to less than 1.0A. The AAT3190 is available in an MSOP-8 or TSOPJW-12 package and is specified over a -40C to +85C operating temperature range.

The AAT3190 charge pump controller provides theregulated 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 .5V into two independent output voltages. The dual low-power charge pumps independently regulate a positive (V_POS ) and negative (V_NEG)out-put voltage. These outputs use external diode and capacitor multiplier stages (as many stages as required) to regulate output voltages up to ±25V uilt-in soft-start circuitry prevents excessive in- ush current during start-up. Ahigh switching fre- uency enables the use of small external capaci- ors. The device' shutdown feature disconnect he load from V_IN and reduces quiescent current to ess than 1.0|A.