MAX1779EUE+

Overview

The MAX1779EUE+ is a low-power triple-output TFT LCD DC-DC converter designed for small active matrix thin-film transistor liquid-crystal displays. It integrates one high-power boost regulator and two low-power charge pumps to generate three independent regulated voltages from a +2.7V to +5.5V input supply. The primary converter delivers up to +13V with ±1% accuracy, while the charge pumps provide positive and negative outputs adjustable up to +40V and down to -40V respectively. Operating at a 250kHz switching frequency, it achieves efficiency up to 91% with internal power MOSFETs. The device features internal supply sequencing, soft-start, and ultra-low shutdown current of 0.1µA, housed in an ultra-thin 16-TSSOP package.

Feature Summary

• Integrates a high-power 250kHz PWM boost regulator and dual charge pumps for complete TFT LCD bias generation
• Provides internal supply sequencing and soft-start functionality to ensure reliable system startup
• Features ultra-low power consumption with 0.1µA shutdown current and 0.5mA quiescent current
• Utilizes proprietary regulation algorithm to minimize output ripple and reduce external capacitor requirements

Applications

• Small active matrix thin-film transistor (TFT) liquid-crystal displays (LCDs)
• Portable electronic devices requiring efficient multi-rail power supplies
• Battery-powered systems needing low-quiescent current regulators

Procurement Notes

Verify the specific suffix against the manufacturer's official ordering guide to confirm pinout compatibility and thermal pad configuration. Ensure the selected variant matches the required input voltage range and output current specifications for the target application. Cross-reference the datasheet revision date to confirm availability of updated electrical characteristics and mechanical drawings before finalizing the design.

Selection Notes

Select this component when designing power systems for small TFT LCD panels that require integrated boost and charge pump capabilities. It is suitable for applications demanding high efficiency up to 91% and minimal external component count. Consider the 16-TSSOP package constraints for thermal management and board space limitations compared to discrete solutions.

Part Context

The MAX1779 belongs to Maxim Integrated's family of specialized power management ICs for display applications. It consolidates multiple power stages into a single ultra-thin package, reducing solution size significantly. This integration supports the trend toward miniaturization in portable consumer electronics while maintaining the stability and noise performance required for sensitive display drivers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.