AIC AIC1652GSTR

The AIC1652 is a high performance inverting DC/DC controller, 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. A pulse frequency modulation scheme is employed to maintain high efficiency conversion under wide input voltage range. Quiescent current is about 80μA and can be reduced to 0.7μA in shutdown mode. Switching frequency being around 70KHz to 160KHz range, small size switching components are ideal for battery powered portable equipments, like notebook and palmtop computers.

• 2.4V to 7V Input Voltage Operation.
• Adjustable Output Voltage up to -40V.
• Low Quiescent Current at 80μA.
• Pulse Frequency Modulation Maintains High Efficiency (87%).
• 70KHz to 160KHz Switching Frequency.
• Power-Saving Shutdown Mode (0.7μA Typical).
• High Efficiency with Low Cost External PNP Bipolar Transistor.

• Negative LCD Contrast Bias for Notebook & Palmtop Computers.
• Negative LCD Contrast Bias for Pen-Based Data System.
• Negative LCD Contrast Bias for Portable Data Collection Terminals.
• Negative LCD Contrast Bias for Personal Digital Assistants.
• Negative Voltage Supply.