MAX749CPA

Power Management - Specialized Overview

The MAX749CPA is a specialized power management IC designed to generate negative LCD-bias contrast voltages from input supplies ranging from +2.0V to +6.0V. It utilizes an internal digital-to-analog converter to scale the full-scale output voltage, which can reach -100V or greater, in 64 equal steps. The device operates with a maximum quiescent current of 60µA and features a shutdown mode with a maximum current of 15µA. It is housed in an 8-pin Plastic DIP package and supports operation across temperature ranges suitable for portable computing applications.

Power Management - Specialized Feature Summary

• Digitally adjustable LCD bias supply generation using an internal DAC
• Flexible control options including digital potentiometer adjustment and PWM signals
• Low power consumption with minimal quiescent and shutdown currents
• Compact design requiring only seven external surface-mount components

Power Management - Specialized Applications

• Notebook Computers
• Laptop Computers
• Palmtop Computers
• Personal Digital Assistants
• Portable Data-Collection Terminals

Power Management - Specialized Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific ordering suffixes against official Analog Devices documentation. Check for obsolete status indicators as this part may be discontinued. Ensure storage conditions meet semiconductor handling standards to prevent damage prior to assembly.

Power Management - Specialized Selection Notes

Select this component for designs requiring precise negative voltage generation for LCD contrast control within low-power portable systems. Evaluate the input voltage range compatibility with the system's battery or power source. Consider the packaging constraints and thermal requirements associated with the 8-pin DIP format. Verify that the external component count aligns with space limitations on the printed circuit board layout.

Power Management - Specialized Part Context

The MAX749 belongs to the Maxim Integrated family of display drivers and controllers focused on power management for liquid crystal displays. It addresses the need for efficient bias generation in mobile devices where power efficiency and board space are critical constraints. The series supports various interface methods for voltage adjustment, catering to different system architecture requirements for portable electronics.

Power Management - Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The MAX749CPA is listed as obsolete and no longer manufactured by Analog Devices/Maxim Integrated. Designers should consult official replacement guides or contact the manufacturer directly for end-of-life transition support.