DESCRIPTION

The AIC1652 is a high performance inverting DC/DC converter, designed to drive an external power switch to generate programmable negative voltages. In the particularly suitable LCD bias contrast application, efficiency of 87 can be achieved with low cost PNP bipolar transistor drivers. Output voltage can be scaled to -40V or greater by two external resistors.

FEATURES

● 2.4V to 7V Input Voltage Operation.

● Adjustable Output Voltage up to -40V.

● Low Quiescent Current at 80mA.

● Pulse Frequency Modulation Maintains High Efficiency (87).

● 70KHz to 160KHz Switching Frequency.

● Power-Saving Shutdown Mode (0.7mA Typical).

● High Efficiency with Low Cost External PNP Bipolar Transistor.

APPLICATIONS

● Negative LCD Contrast Bias for

1. Notebook & Palmtop Computers.

2. Pen-Based Data System.

3. Portable Data Collection Terminals.

4. Personal Digital Assistants.

● Negative Voltage Supply.